/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 15:27:06,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 15:27:06,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 15:27:06,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 15:27:06,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 15:27:06,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 15:27:06,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 15:27:06,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 15:27:06,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 15:27:06,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 15:27:06,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 15:27:06,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-12 15:27:06,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 15:27:06,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 15:27:06,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 15:27:06,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 15:27:06,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 15:27:06,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 15:27:06,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 15:27:06,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 15:27:06,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 15:27:06,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 15:27:06,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 15:27:06,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 15:27:06,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-12 15:27:06,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-12 15:27:06,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-12 15:27:06,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-12 15:27:06,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-12 15:27:06,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-06-12 15:27:06,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 15:27:06,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 15:27:06,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 15:27:06,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 15:27:06,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 15:27:06,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 15:27:06,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 15:27:06,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 15:27:06,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 15:27:06,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 15:27:06,481 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 15:27:06,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 15:27:06,481 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 15:27:06,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 15:27:06,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 15:27:06,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 15:27:06,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 15:27:06,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 15:27:06,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 15:27:06,482 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 15:27:06,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 15:27:06,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 15:27:06,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 15:27:06,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 15:27:06,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 15:27:06,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 15:27:06,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 15:27:06,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:27:06,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 15:27:06,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 15:27:06,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 15:27:06,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 15:27:06,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 15:27:06,499 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 15:27:06,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 15:27:06,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 15:27:06,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 15:27:06,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 15:27:06,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 15:27:06,783 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-12 15:27:06,785 INFO L275 PluginConnector]: CDTParser initialized [2021-06-12 15:27:06,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-06-12 15:27:06,838 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71ba89b0a/50788a5926f140469bf0d28ada174672/FLAG21c5ff315 [2021-06-12 15:27:07,258 INFO L306 CDTParser]: Found 1 translation units. [2021-06-12 15:27:07,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-06-12 15:27:07,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71ba89b0a/50788a5926f140469bf0d28ada174672/FLAG21c5ff315 [2021-06-12 15:27:07,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71ba89b0a/50788a5926f140469bf0d28ada174672 [2021-06-12 15:27:07,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 15:27:07,615 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-12 15:27:07,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-12 15:27:07,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-12 15:27:07,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-12 15:27:07,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:27:07" (1/1) ... [2021-06-12 15:27:07,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17746357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:07, skipping insertion in model container [2021-06-12 15:27:07,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:27:07" (1/1) ... [2021-06-12 15:27:07,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-12 15:27:07,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-12 15:27:07,955 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2021-06-12 15:27:07,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:27:07,962 INFO L203 MainTranslator]: Completed pre-run [2021-06-12 15:27:08,006 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2021-06-12 15:27:08,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:27:08,058 INFO L208 MainTranslator]: Completed translation [2021-06-12 15:27:08,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08 WrapperNode [2021-06-12 15:27:08,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-12 15:27:08,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 15:27:08,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 15:27:08,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 15:27:08,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (1/1) ... [2021-06-12 15:27:08,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (1/1) ... [2021-06-12 15:27:08,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 15:27:08,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 15:27:08,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 15:27:08,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 15:27:08,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (1/1) ... [2021-06-12 15:27:08,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (1/1) ... [2021-06-12 15:27:08,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (1/1) ... [2021-06-12 15:27:08,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (1/1) ... [2021-06-12 15:27:08,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (1/1) ... [2021-06-12 15:27:08,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (1/1) ... [2021-06-12 15:27:08,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (1/1) ... [2021-06-12 15:27:08,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 15:27:08,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 15:27:08,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 15:27:08,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 15:27:08,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:27:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-12 15:27:08,172 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-12 15:27:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-12 15:27:08,173 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-12 15:27:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-12 15:27:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-12 15:27:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-12 15:27:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-12 15:27:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-12 15:27:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-12 15:27:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 15:27:08,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 15:27:08,174 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 15:27:08,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 15:27:08,389 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-12 15:27:08,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:27:08 BoogieIcfgContainer [2021-06-12 15:27:08,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 15:27:08,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 15:27:08,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 15:27:08,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 15:27:08,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.06 03:27:07" (1/3) ... [2021-06-12 15:27:08,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f173e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:27:08, skipping insertion in model container [2021-06-12 15:27:08,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:27:08" (2/3) ... [2021-06-12 15:27:08,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f173e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:27:08, skipping insertion in model container [2021-06-12 15:27:08,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:27:08" (3/3) ... [2021-06-12 15:27:08,397 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-06-12 15:27:08,401 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 15:27:08,401 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 15:27:08,402 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 15:27:08,402 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 15:27:08,422 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,422 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,422 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,422 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,423 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,423 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,423 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,423 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,423 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,423 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,423 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,424 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,424 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,424 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,424 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,424 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,424 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,425 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,425 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,425 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,425 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,425 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,425 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,425 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,426 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,426 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,426 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,426 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,428 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,428 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,428 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,428 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,429 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,429 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,429 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,429 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,429 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,429 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,429 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,429 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,430 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,430 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,430 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,431 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,431 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,443 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,443 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,443 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,443 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,443 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,443 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:27:08,455 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-12 15:27:08,469 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 15:27:08,481 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:27:08,481 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:27:08,481 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:27:08,481 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:27:08,481 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:27:08,481 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:27:08,481 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:27:08,481 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 15:27:08,488 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-12 15:27:08,539 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 15:27:08,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:08,555 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:08,556 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:08,562 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-12 15:27:08,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:08,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765487812] [2021-06-12 15:27:08,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:08,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:08,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765487812] [2021-06-12 15:27:08,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765487812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:27:08,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:27:08,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:27:08,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902985757] [2021-06-12 15:27:08,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:27:08,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:08,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:27:08,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:27:08,933 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:09,080 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-12 15:27:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 15:27:09,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 15:27:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:09,103 INFO L225 Difference]: With dead ends: 3294 [2021-06-12 15:27:09,104 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 15:27:09,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:27:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 15:27:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-12 15:27:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-12 15:27:09,188 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-12 15:27:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:09,188 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-12 15:27:09,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-12 15:27:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 15:27:09,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:09,195 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:09,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 15:27:09,195 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:09,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:09,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-12 15:27:09,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:09,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668315168] [2021-06-12 15:27:09,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:09,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:09,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668315168] [2021-06-12 15:27:09,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668315168] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:27:09,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:27:09,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:27:09,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734625524] [2021-06-12 15:27:09,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:27:09,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:09,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:27:09,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:27:09,317 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:09,427 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-12 15:27:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 15:27:09,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 15:27:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:09,432 INFO L225 Difference]: With dead ends: 1302 [2021-06-12 15:27:09,432 INFO L226 Difference]: Without dead ends: 920 [2021-06-12 15:27:09,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:27:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-12 15:27:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-12 15:27:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-12 15:27:09,463 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-12 15:27:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:09,464 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-12 15:27:09,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-12 15:27:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:27:09,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:09,466 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:09,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 15:27:09,466 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash 93608864, now seen corresponding path program 1 times [2021-06-12 15:27:09,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:09,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352884931] [2021-06-12 15:27:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:09,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:09,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352884931] [2021-06-12 15:27:09,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352884931] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:27:09,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:27:09,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:27:09,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401924912] [2021-06-12 15:27:09,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:27:09,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:09,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:27:09,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:27:09,550 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:09,633 INFO L93 Difference]: Finished difference Result 1332 states and 3512 transitions. [2021-06-12 15:27:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 15:27:09,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-12 15:27:09,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:09,638 INFO L225 Difference]: With dead ends: 1332 [2021-06-12 15:27:09,638 INFO L226 Difference]: Without dead ends: 1072 [2021-06-12 15:27:09,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:27:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-12 15:27:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-06-12 15:27:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-12 15:27:09,658 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-12 15:27:09,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:09,658 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-12 15:27:09,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,658 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-12 15:27:09,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:27:09,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:09,659 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:09,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 15:27:09,660 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:09,660 INFO L82 PathProgramCache]: Analyzing trace with hash -466628886, now seen corresponding path program 2 times [2021-06-12 15:27:09,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:09,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375440277] [2021-06-12 15:27:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:09,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:09,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375440277] [2021-06-12 15:27:09,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375440277] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:27:09,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:27:09,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:27:09,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311063298] [2021-06-12 15:27:09,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:27:09,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:09,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:27:09,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:27:09,731 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:09,852 INFO L93 Difference]: Finished difference Result 1836 states and 4872 transitions. [2021-06-12 15:27:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 15:27:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-12 15:27:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:09,857 INFO L225 Difference]: With dead ends: 1836 [2021-06-12 15:27:09,858 INFO L226 Difference]: Without dead ends: 1505 [2021-06-12 15:27:09,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:09,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-12 15:27:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-12 15:27:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-12 15:27:09,879 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-12 15:27:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:09,880 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-12 15:27:09,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-12 15:27:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:27:09,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:09,881 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:09,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 15:27:09,881 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:09,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:09,882 INFO L82 PathProgramCache]: Analyzing trace with hash -78750066, now seen corresponding path program 3 times [2021-06-12 15:27:09,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:09,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668732590] [2021-06-12 15:27:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:09,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:09,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668732590] [2021-06-12 15:27:09,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668732590] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:27:09,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:27:09,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:27:09,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316444485] [2021-06-12 15:27:09,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:27:09,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:09,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:27:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:27:09,976 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:10,065 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-12 15:27:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:27:10,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-12 15:27:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:10,072 INFO L225 Difference]: With dead ends: 2211 [2021-06-12 15:27:10,072 INFO L226 Difference]: Without dead ends: 1944 [2021-06-12 15:27:10,073 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-12 15:27:10,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-12 15:27:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-12 15:27:10,100 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-12 15:27:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:10,100 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-12 15:27:10,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-12 15:27:10,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:27:10,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:10,102 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:10,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 15:27:10,102 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:10,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:10,103 INFO L82 PathProgramCache]: Analyzing trace with hash -56406816, now seen corresponding path program 4 times [2021-06-12 15:27:10,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:10,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849611259] [2021-06-12 15:27:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:10,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:10,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849611259] [2021-06-12 15:27:10,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849611259] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:27:10,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:27:10,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:27:10,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129497705] [2021-06-12 15:27:10,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:27:10,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:10,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:27:10,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:27:10,185 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:10,304 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-06-12 15:27:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 15:27:10,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-12 15:27:10,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:10,309 INFO L225 Difference]: With dead ends: 1671 [2021-06-12 15:27:10,309 INFO L226 Difference]: Without dead ends: 1173 [2021-06-12 15:27:10,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:10,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-12 15:27:10,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-06-12 15:27:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-06-12 15:27:10,326 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-06-12 15:27:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:10,328 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-06-12 15:27:10,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-06-12 15:27:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:27:10,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:10,330 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:10,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 15:27:10,330 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:10,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:10,330 INFO L82 PathProgramCache]: Analyzing trace with hash -709715269, now seen corresponding path program 1 times [2021-06-12 15:27:10,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:10,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132073335] [2021-06-12 15:27:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:10,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:10,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132073335] [2021-06-12 15:27:10,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132073335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:10,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645325157] [2021-06-12 15:27:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:10,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:27:10,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:10,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645325157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:10,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:10,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:27:10,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754530804] [2021-06-12 15:27:10,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:27:10,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:27:10,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:27:10,644 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:10,779 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-06-12 15:27:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 15:27:10,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 15:27:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:10,784 INFO L225 Difference]: With dead ends: 1526 [2021-06-12 15:27:10,784 INFO L226 Difference]: Without dead ends: 1256 [2021-06-12 15:27:10,784 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:10,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-12 15:27:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-06-12 15:27:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.741007194244604) internal successors, (3048), 1112 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-06-12 15:27:10,808 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-06-12 15:27:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:10,808 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-06-12 15:27:10,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-06-12 15:27:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:27:10,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:10,809 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:11,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 15:27:11,029 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:11,030 INFO L82 PathProgramCache]: Analyzing trace with hash -321836449, now seen corresponding path program 2 times [2021-06-12 15:27:11,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:11,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195257788] [2021-06-12 15:27:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:11,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:11,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195257788] [2021-06-12 15:27:11,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195257788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:11,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701341056] [2021-06-12 15:27:11,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:11,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:27:11,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:11,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701341056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:11,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:11,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 15:27:11,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249859683] [2021-06-12 15:27:11,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:27:11,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:27:11,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:27:11,251 INFO L87 Difference]: Start difference. First operand 1113 states and 3048 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:11,369 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-06-12 15:27:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:27:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 15:27:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:11,376 INFO L225 Difference]: With dead ends: 2408 [2021-06-12 15:27:11,376 INFO L226 Difference]: Without dead ends: 2138 [2021-06-12 15:27:11,376 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-12 15:27:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-06-12 15:27:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.791795665634675) internal successors, (3607), 1292 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:11,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-06-12 15:27:11,401 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-06-12 15:27:11,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:11,401 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-06-12 15:27:11,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:11,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-06-12 15:27:11,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:27:11,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:11,403 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:11,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:11,621 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:11,621 INFO L82 PathProgramCache]: Analyzing trace with hash -299493199, now seen corresponding path program 3 times [2021-06-12 15:27:11,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:11,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608704484] [2021-06-12 15:27:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:11,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:11,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608704484] [2021-06-12 15:27:11,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608704484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:11,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236020297] [2021-06-12 15:27:11,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:11,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 15:27:11,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:11,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:27:11,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:11,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236020297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:11,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:11,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:27:11,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631121526] [2021-06-12 15:27:11,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:27:11,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:11,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:27:11,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:27:11,819 INFO L87 Difference]: Start difference. First operand 1293 states and 3607 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:12,041 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-06-12 15:27:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:27:12,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 15:27:12,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:12,046 INFO L225 Difference]: With dead ends: 2196 [2021-06-12 15:27:12,046 INFO L226 Difference]: Without dead ends: 1621 [2021-06-12 15:27:12,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-12 15:27:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-06-12 15:27:12,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-06-12 15:27:12,079 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-06-12 15:27:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:12,079 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-06-12 15:27:12,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-06-12 15:27:12,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:27:12,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:12,081 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:12,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:12,297 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1925374875, now seen corresponding path program 1 times [2021-06-12 15:27:12,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:12,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375997733] [2021-06-12 15:27:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:12,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:12,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375997733] [2021-06-12 15:27:12,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375997733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:12,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996961129] [2021-06-12 15:27:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:12,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:27:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:12,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996961129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:12,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:12,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:27:12,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158350831] [2021-06-12 15:27:12,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:27:12,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:12,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:27:12,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:12,642 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:12,790 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-06-12 15:27:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:27:12,790 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 15:27:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:12,796 INFO L225 Difference]: With dead ends: 2068 [2021-06-12 15:27:12,796 INFO L226 Difference]: Without dead ends: 1734 [2021-06-12 15:27:12,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-12 15:27:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-06-12 15:27:12,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.7287535410764874) internal successors, (3853), 1412 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-06-12 15:27:12,821 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-06-12 15:27:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:12,821 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-06-12 15:27:12,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-06-12 15:27:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:27:12,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:12,823 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:13,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:13,037 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash -558025153, now seen corresponding path program 2 times [2021-06-12 15:27:13,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:13,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085958705] [2021-06-12 15:27:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:13,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:13,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085958705] [2021-06-12 15:27:13,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085958705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:13,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039902182] [2021-06-12 15:27:13,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:13,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:13,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:13,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:27:13,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:13,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039902182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:13,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:13,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 15:27:13,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045586128] [2021-06-12 15:27:13,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:27:13,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:13,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:27:13,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:27:13,248 INFO L87 Difference]: Start difference. First operand 1413 states and 3853 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:13,342 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-06-12 15:27:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 15:27:13,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 15:27:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:13,353 INFO L225 Difference]: With dead ends: 2061 [2021-06-12 15:27:13,353 INFO L226 Difference]: Without dead ends: 1791 [2021-06-12 15:27:13,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-12 15:27:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-06-12 15:27:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.721093202522775) internal successors, (3883), 1427 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-06-12 15:27:13,377 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-06-12 15:27:13,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:13,377 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-06-12 15:27:13,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:13,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-06-12 15:27:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:27:13,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:13,379 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:13,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 15:27:13,593 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:13,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:13,593 INFO L82 PathProgramCache]: Analyzing trace with hash -128271569, now seen corresponding path program 3 times [2021-06-12 15:27:13,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:13,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309547911] [2021-06-12 15:27:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:13,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309547911] [2021-06-12 15:27:13,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309547911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318156791] [2021-06-12 15:27:13,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:13,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:27:13,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:13,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:27:13,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:13,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318156791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:13,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:13,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 15:27:13,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405687681] [2021-06-12 15:27:13,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:27:13,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:13,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:27:13,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:27:13,838 INFO L87 Difference]: Start difference. First operand 1428 states and 3883 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:13,981 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-06-12 15:27:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:27:13,982 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 15:27:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:13,985 INFO L225 Difference]: With dead ends: 2006 [2021-06-12 15:27:13,985 INFO L226 Difference]: Without dead ends: 1736 [2021-06-12 15:27:13,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-12 15:27:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-06-12 15:27:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.7245970567624385) internal successors, (3888), 1427 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-06-12 15:27:14,007 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-06-12 15:27:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:14,007 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-06-12 15:27:14,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-06-12 15:27:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:27:14,008 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:14,008 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:14,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:14,227 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:14,228 INFO L82 PathProgramCache]: Analyzing trace with hash -186005699, now seen corresponding path program 4 times [2021-06-12 15:27:14,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:14,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039698007] [2021-06-12 15:27:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:14,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:14,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039698007] [2021-06-12 15:27:14,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039698007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:14,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635794277] [2021-06-12 15:27:14,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:14,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:14,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:27:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:14,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635794277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:14,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:14,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 15:27:14,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448205799] [2021-06-12 15:27:14,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:27:14,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:14,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:27:14,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:27:14,417 INFO L87 Difference]: Start difference. First operand 1428 states and 3888 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:14,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:14,535 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-06-12 15:27:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 15:27:14,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 15:27:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:14,542 INFO L225 Difference]: With dead ends: 2798 [2021-06-12 15:27:14,543 INFO L226 Difference]: Without dead ends: 2528 [2021-06-12 15:27:14,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-12 15:27:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-06-12 15:27:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.7672682016179215) internal successors, (4447), 1607 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-06-12 15:27:14,571 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-06-12 15:27:14,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:14,571 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-06-12 15:27:14,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:14,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-06-12 15:27:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:27:14,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:14,573 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:14,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:14,791 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:14,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash -163662449, now seen corresponding path program 5 times [2021-06-12 15:27:14,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:14,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338319245] [2021-06-12 15:27:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:14,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:14,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338319245] [2021-06-12 15:27:14,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338319245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:14,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682992563] [2021-06-12 15:27:14,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:14,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 15:27:14,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:14,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:27:14,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:14,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682992563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:14,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:14,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 15:27:14,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242303727] [2021-06-12 15:27:14,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:27:14,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:27:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:27:14,987 INFO L87 Difference]: Start difference. First operand 1608 states and 4447 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:15,165 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-06-12 15:27:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:27:15,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 15:27:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:15,168 INFO L225 Difference]: With dead ends: 2285 [2021-06-12 15:27:15,169 INFO L226 Difference]: Without dead ends: 1706 [2021-06-12 15:27:15,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:15,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-06-12 15:27:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-06-12 15:27:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.7271341463414633) internal successors, (3578), 1312 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-06-12 15:27:15,192 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-06-12 15:27:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:15,192 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-06-12 15:27:15,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-06-12 15:27:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:27:15,201 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:15,203 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:15,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 15:27:15,417 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1043607760, now seen corresponding path program 6 times [2021-06-12 15:27:15,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:15,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742092630] [2021-06-12 15:27:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:15,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:15,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742092630] [2021-06-12 15:27:15,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742092630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:15,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896633202] [2021-06-12 15:27:15,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:15,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 15:27:15,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:27:15,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:15,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896633202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:15,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:15,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:27:15,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176511613] [2021-06-12 15:27:15,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:27:15,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:15,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:27:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:27:15,639 INFO L87 Difference]: Start difference. First operand 1313 states and 3578 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:15,775 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-06-12 15:27:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:27:15,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:27:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:15,778 INFO L225 Difference]: With dead ends: 1931 [2021-06-12 15:27:15,779 INFO L226 Difference]: Without dead ends: 1661 [2021-06-12 15:27:15,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-12 15:27:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-06-12 15:27:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.741888968997837) internal successors, (3803), 1387 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-06-12 15:27:15,801 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-06-12 15:27:15,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:15,801 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-06-12 15:27:15,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-06-12 15:27:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:27:15,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:15,803 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:16,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 15:27:16,013 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:16,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1473361344, now seen corresponding path program 7 times [2021-06-12 15:27:16,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:16,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211684756] [2021-06-12 15:27:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:16,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:16,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211684756] [2021-06-12 15:27:16,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211684756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:16,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313249493] [2021-06-12 15:27:16,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:16,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:27:16,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:16,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313249493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:16,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:16,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:27:16,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925447093] [2021-06-12 15:27:16,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:27:16,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:27:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:16,226 INFO L87 Difference]: Start difference. First operand 1388 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:16,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:16,450 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-06-12 15:27:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:27:16,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:27:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:16,453 INFO L225 Difference]: With dead ends: 2111 [2021-06-12 15:27:16,453 INFO L226 Difference]: Without dead ends: 1841 [2021-06-12 15:27:16,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:27:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-12 15:27:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-06-12 15:27:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7688098495212037) internal successors, (4048), 1462 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-06-12 15:27:16,476 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-06-12 15:27:16,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:16,476 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-06-12 15:27:16,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-06-12 15:27:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:27:16,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:16,478 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:16,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 15:27:16,697 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1415627214, now seen corresponding path program 8 times [2021-06-12 15:27:16,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:16,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953754274] [2021-06-12 15:27:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:16,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:16,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953754274] [2021-06-12 15:27:16,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953754274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:16,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815997336] [2021-06-12 15:27:16,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:16,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:16,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:16,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:16,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:16,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815997336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:16,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:16,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:27:16,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585124599] [2021-06-12 15:27:16,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:27:16,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:16,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:27:16,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:27:16,899 INFO L87 Difference]: Start difference. First operand 1463 states and 4048 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:17,074 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-06-12 15:27:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:27:17,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:27:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:17,078 INFO L225 Difference]: With dead ends: 2858 [2021-06-12 15:27:17,078 INFO L226 Difference]: Without dead ends: 2588 [2021-06-12 15:27:17,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:27:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-12 15:27:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-06-12 15:27:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.805724725943971) internal successors, (4607), 1642 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-06-12 15:27:17,105 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-06-12 15:27:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:17,106 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-06-12 15:27:17,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:17,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-06-12 15:27:17,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:27:17,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:17,107 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:17,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 15:27:17,321 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:17,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1437970464, now seen corresponding path program 9 times [2021-06-12 15:27:17,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:17,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96897133] [2021-06-12 15:27:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:17,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:17,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96897133] [2021-06-12 15:27:17,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96897133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:17,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811300542] [2021-06-12 15:27:17,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:17,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:27:17,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:17,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:17,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:17,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811300542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:17,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:17,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:27:17,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070030779] [2021-06-12 15:27:17,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:27:17,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:17,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:27:17,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:17,520 INFO L87 Difference]: Start difference. First operand 1643 states and 4607 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:17,771 INFO L93 Difference]: Finished difference Result 2726 states and 7296 transitions. [2021-06-12 15:27:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:17,772 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:27:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:17,775 INFO L225 Difference]: With dead ends: 2726 [2021-06-12 15:27:17,775 INFO L226 Difference]: Without dead ends: 2151 [2021-06-12 15:27:17,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:27:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-12 15:27:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1678. [2021-06-12 15:27:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 2.7924865831842576) internal successors, (4683), 1677 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4683 transitions. [2021-06-12 15:27:17,802 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4683 transitions. Word has length 55 [2021-06-12 15:27:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:17,803 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4683 transitions. [2021-06-12 15:27:17,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4683 transitions. [2021-06-12 15:27:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:17,805 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:17,805 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:18,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 15:27:18,021 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:18,021 INFO L82 PathProgramCache]: Analyzing trace with hash -173240564, now seen corresponding path program 10 times [2021-06-12 15:27:18,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:18,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213656758] [2021-06-12 15:27:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:18,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:18,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213656758] [2021-06-12 15:27:18,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213656758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:18,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882277727] [2021-06-12 15:27:18,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:18,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:18,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:18,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:18,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:18,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882277727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:18,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:18,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-12 15:27:18,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352638614] [2021-06-12 15:27:18,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:18,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:18,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:18,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:18,286 INFO L87 Difference]: Start difference. First operand 1678 states and 4683 transitions. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:18,495 INFO L93 Difference]: Finished difference Result 2468 states and 6583 transitions. [2021-06-12 15:27:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:27:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:27:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:18,499 INFO L225 Difference]: With dead ends: 2468 [2021-06-12 15:27:18,499 INFO L226 Difference]: Without dead ends: 2134 [2021-06-12 15:27:18,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:27:18,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-06-12 15:27:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1763. [2021-06-12 15:27:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.754256526674234) internal successors, (4853), 1762 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4853 transitions. [2021-06-12 15:27:18,525 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4853 transitions. Word has length 60 [2021-06-12 15:27:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:18,525 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4853 transitions. [2021-06-12 15:27:18,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4853 transitions. [2021-06-12 15:27:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:18,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:18,527 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:18,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:18,734 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash -722803536, now seen corresponding path program 11 times [2021-06-12 15:27:18,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:18,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883395872] [2021-06-12 15:27:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:18,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883395872] [2021-06-12 15:27:18,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883395872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950394014] [2021-06-12 15:27:18,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:18,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:27:18,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:18,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:18,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950394014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:18,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:18,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:27:18,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092583246] [2021-06-12 15:27:18,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:27:18,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:27:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:18,962 INFO L87 Difference]: Start difference. First operand 1763 states and 4853 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:19,114 INFO L93 Difference]: Finished difference Result 2561 states and 6577 transitions. [2021-06-12 15:27:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:27:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:27:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:19,118 INFO L225 Difference]: With dead ends: 2561 [2021-06-12 15:27:19,118 INFO L226 Difference]: Without dead ends: 2291 [2021-06-12 15:27:19,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-06-12 15:27:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1778. [2021-06-12 15:27:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-12 15:27:19,147 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-12 15:27:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:19,147 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-12 15:27:19,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-12 15:27:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:19,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:19,149 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:19,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:19,367 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:19,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:19,367 INFO L82 PathProgramCache]: Analyzing trace with hash -790954592, now seen corresponding path program 12 times [2021-06-12 15:27:19,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:19,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867032229] [2021-06-12 15:27:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:19,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:19,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867032229] [2021-06-12 15:27:19,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867032229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:19,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801039088] [2021-06-12 15:27:19,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:19,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:27:19,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:19,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:19,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:19,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801039088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:19,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:19,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 15:27:19,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136244734] [2021-06-12 15:27:19,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:27:19,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:19,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:27:19,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:27:19,592 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:19,764 INFO L93 Difference]: Finished difference Result 2446 states and 6347 transitions. [2021-06-12 15:27:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:27:19,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:27:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:19,767 INFO L225 Difference]: With dead ends: 2446 [2021-06-12 15:27:19,767 INFO L226 Difference]: Without dead ends: 2176 [2021-06-12 15:27:19,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:27:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-12 15:27:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1778. [2021-06-12 15:27:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-12 15:27:19,790 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-12 15:27:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:19,790 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-12 15:27:19,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-12 15:27:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:19,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:19,792 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:20,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 15:27:20,011 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:20,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2087923666, now seen corresponding path program 13 times [2021-06-12 15:27:20,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:20,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276407796] [2021-06-12 15:27:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:20,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:20,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276407796] [2021-06-12 15:27:20,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276407796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:20,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869826304] [2021-06-12 15:27:20,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:20,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:20,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869826304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:20,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:20,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:27:20,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797346765] [2021-06-12 15:27:20,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:27:20,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:20,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:27:20,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:20,219 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:20,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:20,361 INFO L93 Difference]: Finished difference Result 2421 states and 6297 transitions. [2021-06-12 15:27:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:27:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:27:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:20,363 INFO L225 Difference]: With dead ends: 2421 [2021-06-12 15:27:20,363 INFO L226 Difference]: Without dead ends: 2151 [2021-06-12 15:27:20,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-12 15:27:20,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1778. [2021-06-12 15:27:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-12 15:27:20,386 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-12 15:27:20,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:20,387 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-12 15:27:20,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:20,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-12 15:27:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:20,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:20,388 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:20,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:20,602 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:20,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:20,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1658170082, now seen corresponding path program 14 times [2021-06-12 15:27:20,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:20,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074639350] [2021-06-12 15:27:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:20,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:20,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074639350] [2021-06-12 15:27:20,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074639350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:20,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546300464] [2021-06-12 15:27:20,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:20,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:20,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546300464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:20,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:20,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 15:27:20,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127550715] [2021-06-12 15:27:20,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:27:20,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:20,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:27:20,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:27:20,850 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:21,064 INFO L93 Difference]: Finished difference Result 2431 states and 6347 transitions. [2021-06-12 15:27:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:27:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:21,067 INFO L225 Difference]: With dead ends: 2431 [2021-06-12 15:27:21,067 INFO L226 Difference]: Without dead ends: 2161 [2021-06-12 15:27:21,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:27:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-12 15:27:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1778. [2021-06-12 15:27:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7507034327518287) internal successors, (4888), 1777 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4888 transitions. [2021-06-12 15:27:21,109 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4888 transitions. Word has length 60 [2021-06-12 15:27:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:21,109 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4888 transitions. [2021-06-12 15:27:21,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4888 transitions. [2021-06-12 15:27:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:21,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:21,111 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:21,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 15:27:21,325 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:21,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1715904212, now seen corresponding path program 15 times [2021-06-12 15:27:21,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:21,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222751797] [2021-06-12 15:27:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:21,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:21,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222751797] [2021-06-12 15:27:21,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222751797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:21,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657831362] [2021-06-12 15:27:21,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:21,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:27:21,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:21,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:21,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:21,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657831362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:21,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:21,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:27:21,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702823252] [2021-06-12 15:27:21,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:27:21,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:21,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:27:21,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:21,518 INFO L87 Difference]: Start difference. First operand 1778 states and 4888 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:21,690 INFO L93 Difference]: Finished difference Result 3198 states and 8521 transitions. [2021-06-12 15:27:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:27:21,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:27:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:21,694 INFO L225 Difference]: With dead ends: 3198 [2021-06-12 15:27:21,694 INFO L226 Difference]: Without dead ends: 2928 [2021-06-12 15:27:21,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:27:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-06-12 15:27:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 1958. [2021-06-12 15:27:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.783341849770056) internal successors, (5447), 1957 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5447 transitions. [2021-06-12 15:27:21,725 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5447 transitions. Word has length 60 [2021-06-12 15:27:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:21,725 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 5447 transitions. [2021-06-12 15:27:21,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5447 transitions. [2021-06-12 15:27:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:21,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:21,727 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:21,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 15:27:21,944 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:21,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:21,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1693560962, now seen corresponding path program 16 times [2021-06-12 15:27:21,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:21,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282915368] [2021-06-12 15:27:21,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:22,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:22,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282915368] [2021-06-12 15:27:22,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282915368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:22,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187114997] [2021-06-12 15:27:22,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:22,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:22,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:22,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187114997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:22,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:22,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 15:27:22,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743347629] [2021-06-12 15:27:22,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:27:22,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:22,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:27:22,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:27:22,148 INFO L87 Difference]: Start difference. First operand 1958 states and 5447 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:22,469 INFO L93 Difference]: Finished difference Result 3021 states and 8021 transitions. [2021-06-12 15:27:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:27:22,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:27:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:22,472 INFO L225 Difference]: With dead ends: 3021 [2021-06-12 15:27:22,472 INFO L226 Difference]: Without dead ends: 2446 [2021-06-12 15:27:22,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:27:22,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-12 15:27:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1603. [2021-06-12 15:27:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 2.7265917602996255) internal successors, (4368), 1602 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4368 transitions. [2021-06-12 15:27:22,495 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4368 transitions. Word has length 60 [2021-06-12 15:27:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:22,495 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 4368 transitions. [2021-06-12 15:27:22,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4368 transitions. [2021-06-12 15:27:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:22,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:22,497 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:22,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 15:27:22,716 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:22,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2063950335, now seen corresponding path program 17 times [2021-06-12 15:27:22,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:22,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651528344] [2021-06-12 15:27:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:22,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:22,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651528344] [2021-06-12 15:27:22,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651528344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:22,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126985700] [2021-06-12 15:27:22,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:22,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:27:22,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:22,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126985700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:22,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:22,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:27:22,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542846379] [2021-06-12 15:27:22,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:27:22,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:27:22,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:27:22,930 INFO L87 Difference]: Start difference. First operand 1603 states and 4368 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:23,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:23,086 INFO L93 Difference]: Finished difference Result 2321 states and 6007 transitions. [2021-06-12 15:27:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:27:23,086 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:27:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:23,088 INFO L225 Difference]: With dead ends: 2321 [2021-06-12 15:27:23,088 INFO L226 Difference]: Without dead ends: 2051 [2021-06-12 15:27:23,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:27:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-12 15:27:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1678. [2021-06-12 15:27:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 2.738819320214669) internal successors, (4593), 1677 states have internal predecessors, (4593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4593 transitions. [2021-06-12 15:27:23,108 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4593 transitions. Word has length 65 [2021-06-12 15:27:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:23,108 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4593 transitions. [2021-06-12 15:27:23,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4593 transitions. [2021-06-12 15:27:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:23,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:23,110 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:23,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 15:27:23,313 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2132101391, now seen corresponding path program 18 times [2021-06-12 15:27:23,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:23,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094764380] [2021-06-12 15:27:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:23,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:23,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094764380] [2021-06-12 15:27:23,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094764380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:23,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582448476] [2021-06-12 15:27:23,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:23,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:27:23,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:23,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:23,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:23,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582448476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:23,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:23,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:27:23,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096238070] [2021-06-12 15:27:23,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:23,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:23,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:23,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:23,570 INFO L87 Difference]: Start difference. First operand 1678 states and 4593 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:23,774 INFO L93 Difference]: Finished difference Result 2491 states and 6422 transitions. [2021-06-12 15:27:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:23,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:27:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:23,776 INFO L225 Difference]: With dead ends: 2491 [2021-06-12 15:27:23,776 INFO L226 Difference]: Without dead ends: 2221 [2021-06-12 15:27:23,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:27:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-06-12 15:27:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1753. [2021-06-12 15:27:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 2.75) internal successors, (4818), 1752 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4818 transitions. [2021-06-12 15:27:23,799 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4818 transitions. Word has length 65 [2021-06-12 15:27:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:23,799 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4818 transitions. [2021-06-12 15:27:23,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:23,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4818 transitions. [2021-06-12 15:27:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:23,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:23,801 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:24,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 15:27:24,017 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash 865896831, now seen corresponding path program 19 times [2021-06-12 15:27:24,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:24,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34306045] [2021-06-12 15:27:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:24,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:24,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34306045] [2021-06-12 15:27:24,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34306045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:24,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028617333] [2021-06-12 15:27:24,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:24,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028617333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:24,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:24,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:27:24,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538646143] [2021-06-12 15:27:24,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:27:24,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:24,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:27:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:27:24,235 INFO L87 Difference]: Start difference. First operand 1753 states and 4818 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:24,447 INFO L93 Difference]: Finished difference Result 2566 states and 6677 transitions. [2021-06-12 15:27:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:27:24,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:27:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:24,450 INFO L225 Difference]: With dead ends: 2566 [2021-06-12 15:27:24,450 INFO L226 Difference]: Without dead ends: 2296 [2021-06-12 15:27:24,450 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:27:24,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-12 15:27:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1828. [2021-06-12 15:27:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.768472906403941) internal successors, (5058), 1827 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 5058 transitions. [2021-06-12 15:27:24,474 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 5058 transitions. Word has length 65 [2021-06-12 15:27:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:24,474 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 5058 transitions. [2021-06-12 15:27:24,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 5058 transitions. [2021-06-12 15:27:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:24,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:24,476 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:24,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:24,693 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:24,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:24,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1295650415, now seen corresponding path program 20 times [2021-06-12 15:27:24,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:24,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92494093] [2021-06-12 15:27:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:24,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92494093] [2021-06-12 15:27:24,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92494093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654061611] [2021-06-12 15:27:24,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:24,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:24,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:24,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:24,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:24,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654061611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:24,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:24,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:27:24,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921469473] [2021-06-12 15:27:24,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:24,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:24,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:24,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:24,937 INFO L87 Difference]: Start difference. First operand 1828 states and 5058 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:25,223 INFO L93 Difference]: Finished difference Result 3144 states and 8303 transitions. [2021-06-12 15:27:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:25,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:27:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:25,226 INFO L225 Difference]: With dead ends: 3144 [2021-06-12 15:27:25,226 INFO L226 Difference]: Without dead ends: 2521 [2021-06-12 15:27:25,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:27:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-12 15:27:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1903. [2021-06-12 15:27:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 2.780231335436383) internal successors, (5288), 1902 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5288 transitions. [2021-06-12 15:27:25,267 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5288 transitions. Word has length 65 [2021-06-12 15:27:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:25,267 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5288 transitions. [2021-06-12 15:27:25,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5288 transitions. [2021-06-12 15:27:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:25,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:25,269 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:25,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 15:27:25,485 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:25,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1237916285, now seen corresponding path program 21 times [2021-06-12 15:27:25,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:25,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090253165] [2021-06-12 15:27:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:25,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:25,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090253165] [2021-06-12 15:27:25,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090253165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:25,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110781622] [2021-06-12 15:27:25,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:25,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:27:25,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:25,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:25,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:25,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110781622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:25,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:25,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:27:25,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541606132] [2021-06-12 15:27:25,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:27:25,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:25,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:27:25,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:27:25,681 INFO L87 Difference]: Start difference. First operand 1903 states and 5288 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:25,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:25,911 INFO L93 Difference]: Finished difference Result 3348 states and 8971 transitions. [2021-06-12 15:27:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:25,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:27:25,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:25,915 INFO L225 Difference]: With dead ends: 3348 [2021-06-12 15:27:25,915 INFO L226 Difference]: Without dead ends: 3078 [2021-06-12 15:27:25,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:27:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-12 15:27:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2083. [2021-06-12 15:27:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 2.80835734870317) internal successors, (5847), 2082 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5847 transitions. [2021-06-12 15:27:25,943 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5847 transitions. Word has length 65 [2021-06-12 15:27:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:25,943 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 5847 transitions. [2021-06-12 15:27:25,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5847 transitions. [2021-06-12 15:27:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:25,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:25,945 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:26,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:26,157 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:26,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1260259535, now seen corresponding path program 22 times [2021-06-12 15:27:26,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:26,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061077953] [2021-06-12 15:27:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:26,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:26,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061077953] [2021-06-12 15:27:26,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061077953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:26,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557723062] [2021-06-12 15:27:26,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:26,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:26,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:26,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:26,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:26,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557723062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:26,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:26,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:27:26,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142800302] [2021-06-12 15:27:26,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:26,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:26,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:26,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:26,404 INFO L87 Difference]: Start difference. First operand 2083 states and 5847 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:26,760 INFO L93 Difference]: Finished difference Result 3216 states and 8636 transitions. [2021-06-12 15:27:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:26,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:27:26,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:26,763 INFO L225 Difference]: With dead ends: 3216 [2021-06-12 15:27:26,763 INFO L226 Difference]: Without dead ends: 2641 [2021-06-12 15:27:26,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-06-12 15:27:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 1524. [2021-06-12 15:27:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 2.7288246881155613) internal successors, (4156), 1523 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4156 transitions. [2021-06-12 15:27:26,785 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4156 transitions. Word has length 65 [2021-06-12 15:27:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:26,785 INFO L482 AbstractCegarLoop]: Abstraction has 1524 states and 4156 transitions. [2021-06-12 15:27:26,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:26,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4156 transitions. [2021-06-12 15:27:26,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:26,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:26,786 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:27,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 15:27:27,001 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:27,001 INFO L82 PathProgramCache]: Analyzing trace with hash 632250685, now seen corresponding path program 23 times [2021-06-12 15:27:27,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:27,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728277680] [2021-06-12 15:27:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:27,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:27,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728277680] [2021-06-12 15:27:27,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728277680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:27,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696434284] [2021-06-12 15:27:27,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:27,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:27:27,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:27,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:27,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:27,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696434284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:27,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:27,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-12 15:27:27,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111560870] [2021-06-12 15:27:27,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:27,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:27,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:27,269 INFO L87 Difference]: Start difference. First operand 1524 states and 4156 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:27,469 INFO L93 Difference]: Finished difference Result 2364 states and 6156 transitions. [2021-06-12 15:27:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:27,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:27:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:27,471 INFO L225 Difference]: With dead ends: 2364 [2021-06-12 15:27:27,471 INFO L226 Difference]: Without dead ends: 2030 [2021-06-12 15:27:27,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:27:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2021-06-12 15:27:27,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1609. [2021-06-12 15:27:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.6902985074626864) internal successors, (4326), 1608 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4326 transitions. [2021-06-12 15:27:27,488 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4326 transitions. Word has length 70 [2021-06-12 15:27:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:27,489 INFO L482 AbstractCegarLoop]: Abstraction has 1609 states and 4326 transitions. [2021-06-12 15:27:27,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4326 transitions. [2021-06-12 15:27:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:27,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:27,490 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:27,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:27,691 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash -515245599, now seen corresponding path program 24 times [2021-06-12 15:27:27,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:27,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847149639] [2021-06-12 15:27:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:27,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:27,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847149639] [2021-06-12 15:27:27,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847149639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:27,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716101407] [2021-06-12 15:27:27,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:27,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:27:27,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:27,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:27,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:27,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716101407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:27,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:27,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:27:27,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951847269] [2021-06-12 15:27:27,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:27,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:27,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:27,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:27,939 INFO L87 Difference]: Start difference. First operand 1609 states and 4326 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:28,085 INFO L93 Difference]: Finished difference Result 2686 states and 6737 transitions. [2021-06-12 15:27:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:27:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:27:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:28,088 INFO L225 Difference]: With dead ends: 2686 [2021-06-12 15:27:28,088 INFO L226 Difference]: Without dead ends: 2416 [2021-06-12 15:27:28,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:27:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-12 15:27:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1753. [2021-06-12 15:27:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 2.7071917808219177) internal successors, (4743), 1752 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4743 transitions. [2021-06-12 15:27:28,108 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4743 transitions. Word has length 70 [2021-06-12 15:27:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:28,109 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4743 transitions. [2021-06-12 15:27:28,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4743 transitions. [2021-06-12 15:27:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:28,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:28,110 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:28,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 15:27:28,311 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:28,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:28,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1201428783, now seen corresponding path program 25 times [2021-06-12 15:27:28,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:28,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023003081] [2021-06-12 15:27:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:28,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:28,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023003081] [2021-06-12 15:27:28,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023003081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:28,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239093162] [2021-06-12 15:27:28,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:28,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:28,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:28,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239093162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:28,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:28,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:27:28,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222226296] [2021-06-12 15:27:28,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:28,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:28,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:28,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:28,566 INFO L87 Difference]: Start difference. First operand 1753 states and 4743 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:28,770 INFO L93 Difference]: Finished difference Result 2646 states and 6732 transitions. [2021-06-12 15:27:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:28,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:27:28,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:28,773 INFO L225 Difference]: With dead ends: 2646 [2021-06-12 15:27:28,773 INFO L226 Difference]: Without dead ends: 2376 [2021-06-12 15:27:28,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:27:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-06-12 15:27:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1828. [2021-06-12 15:27:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.7192118226600983) internal successors, (4968), 1827 states have internal predecessors, (4968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4968 transitions. [2021-06-12 15:27:28,794 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4968 transitions. Word has length 70 [2021-06-12 15:27:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:28,794 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 4968 transitions. [2021-06-12 15:27:28,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4968 transitions. [2021-06-12 15:27:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:28,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:28,796 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:29,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:29,005 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1286463521, now seen corresponding path program 26 times [2021-06-12 15:27:29,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:29,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296546975] [2021-06-12 15:27:29,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:29,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:29,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296546975] [2021-06-12 15:27:29,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296546975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:29,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289011017] [2021-06-12 15:27:29,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:29,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:29,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:29,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:29,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289011017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:29,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:29,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:27:29,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253853427] [2021-06-12 15:27:29,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:29,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:29,316 INFO L87 Difference]: Start difference. First operand 1828 states and 4968 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:29,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:29,495 INFO L93 Difference]: Finished difference Result 2696 states and 6907 transitions. [2021-06-12 15:27:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:27:29,495 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:27:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:29,497 INFO L225 Difference]: With dead ends: 2696 [2021-06-12 15:27:29,497 INFO L226 Difference]: Without dead ends: 2426 [2021-06-12 15:27:29,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:27:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-12 15:27:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1903. [2021-06-12 15:27:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 2.730283911671924) internal successors, (5193), 1902 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5193 transitions. [2021-06-12 15:27:29,521 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5193 transitions. Word has length 70 [2021-06-12 15:27:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:29,521 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5193 transitions. [2021-06-12 15:27:29,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:29,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5193 transitions. [2021-06-12 15:27:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:29,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:29,523 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:29,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 15:27:29,729 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1354614577, now seen corresponding path program 27 times [2021-06-12 15:27:29,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:29,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846719354] [2021-06-12 15:27:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:29,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:29,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846719354] [2021-06-12 15:27:29,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846719354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:29,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235014713] [2021-06-12 15:27:29,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:29,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:27:29,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:29,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:27:29,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:29,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235014713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:29,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:29,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:27:29,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251824000] [2021-06-12 15:27:29,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:29,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:29,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:29,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:29,977 INFO L87 Difference]: Start difference. First operand 1903 states and 5193 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:30,204 INFO L93 Difference]: Finished difference Result 2721 states and 7032 transitions. [2021-06-12 15:27:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:30,204 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:27:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:30,206 INFO L225 Difference]: With dead ends: 2721 [2021-06-12 15:27:30,206 INFO L226 Difference]: Without dead ends: 2451 [2021-06-12 15:27:30,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:27:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-12 15:27:30,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1978. [2021-06-12 15:27:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 2.74051593323217) internal successors, (5418), 1977 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5418 transitions. [2021-06-12 15:27:30,229 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5418 transitions. Word has length 70 [2021-06-12 15:27:30,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:30,229 INFO L482 AbstractCegarLoop]: Abstraction has 1978 states and 5418 transitions. [2021-06-12 15:27:30,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:30,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5418 transitions. [2021-06-12 15:27:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:30,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:30,231 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:30,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:30,442 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:30,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1643383645, now seen corresponding path program 28 times [2021-06-12 15:27:30,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:30,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187847642] [2021-06-12 15:27:30,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:30,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:30,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187847642] [2021-06-12 15:27:30,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187847642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:30,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815679751] [2021-06-12 15:27:30,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:30,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:30,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:30,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:30,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:30,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815679751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:30,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:30,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:27:30,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418013860] [2021-06-12 15:27:30,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:30,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:30,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:30,680 INFO L87 Difference]: Start difference. First operand 1978 states and 5418 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:30,881 INFO L93 Difference]: Finished difference Result 2791 states and 7277 transitions. [2021-06-12 15:27:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:27:30,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:27:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:30,884 INFO L225 Difference]: With dead ends: 2791 [2021-06-12 15:27:30,884 INFO L226 Difference]: Without dead ends: 2521 [2021-06-12 15:27:30,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:27:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-12 15:27:30,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2053. [2021-06-12 15:27:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.757309941520468) internal successors, (5658), 2052 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5658 transitions. [2021-06-12 15:27:30,908 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5658 transitions. Word has length 70 [2021-06-12 15:27:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:30,908 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5658 transitions. [2021-06-12 15:27:30,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5658 transitions. [2021-06-12 15:27:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:30,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:30,910 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:31,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 15:27:31,111 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:31,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2073137229, now seen corresponding path program 29 times [2021-06-12 15:27:31,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:31,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997705822] [2021-06-12 15:27:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:31,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:31,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997705822] [2021-06-12 15:27:31,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997705822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:31,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516362043] [2021-06-12 15:27:31,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:31,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:27:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:31,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:31,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:31,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516362043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:31,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:31,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:27:31,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511820215] [2021-06-12 15:27:31,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:31,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:31,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:31,362 INFO L87 Difference]: Start difference. First operand 2053 states and 5658 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:31,687 INFO L93 Difference]: Finished difference Result 3369 states and 8903 transitions. [2021-06-12 15:27:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:27:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:27:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:31,690 INFO L225 Difference]: With dead ends: 3369 [2021-06-12 15:27:31,690 INFO L226 Difference]: Without dead ends: 2746 [2021-06-12 15:27:31,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-06-12 15:27:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2128. [2021-06-12 15:27:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.768218147625764) internal successors, (5888), 2127 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-06-12 15:27:31,714 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-06-12 15:27:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:31,715 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-06-12 15:27:31,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:31,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-06-12 15:27:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:31,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:31,717 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:31,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 15:27:31,917 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2015403099, now seen corresponding path program 30 times [2021-06-12 15:27:31,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:31,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627792880] [2021-06-12 15:27:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:31,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627792880] [2021-06-12 15:27:31,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627792880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132806655] [2021-06-12 15:27:31,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:32,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:27:32,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:32,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:32,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:32,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132806655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:32,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:32,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:27:32,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295532163] [2021-06-12 15:27:32,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:32,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:32,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:32,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:32,129 INFO L87 Difference]: Start difference. First operand 2128 states and 5888 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:32,365 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-06-12 15:27:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:27:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:32,369 INFO L225 Difference]: With dead ends: 3598 [2021-06-12 15:27:32,369 INFO L226 Difference]: Without dead ends: 3328 [2021-06-12 15:27:32,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:27:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-12 15:27:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-06-12 15:27:32,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.7945383615084527) internal successors, (6447), 2307 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-06-12 15:27:32,400 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-06-12 15:27:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:32,400 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-06-12 15:27:32,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-06-12 15:27:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:32,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:32,402 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:32,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 15:27:32,617 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:32,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:32,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2037746349, now seen corresponding path program 31 times [2021-06-12 15:27:32,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:32,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584444066] [2021-06-12 15:27:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:32,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:32,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584444066] [2021-06-12 15:27:32,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584444066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:32,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141140324] [2021-06-12 15:27:32,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:32,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:32,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141140324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:32,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:32,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:27:32,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854403233] [2021-06-12 15:27:32,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:32,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:32,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:32,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:32,854 INFO L87 Difference]: Start difference. First operand 2308 states and 6447 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:33,220 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-06-12 15:27:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:27:33,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:27:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:33,223 INFO L225 Difference]: With dead ends: 3421 [2021-06-12 15:27:33,223 INFO L226 Difference]: Without dead ends: 2846 [2021-06-12 15:27:33,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-12 15:27:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-06-12 15:27:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.7291897891231964) internal successors, (4918), 1802 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-06-12 15:27:33,247 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-06-12 15:27:33,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:33,247 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-06-12 15:27:33,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-06-12 15:27:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:33,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:33,249 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:33,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 15:27:33,465 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:33,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1814233586, now seen corresponding path program 32 times [2021-06-12 15:27:33,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:33,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559123080] [2021-06-12 15:27:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:33,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:33,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559123080] [2021-06-12 15:27:33,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559123080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:33,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431045975] [2021-06-12 15:27:33,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:33,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:33,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:33,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:33,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431045975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:33,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:33,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:27:33,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200702991] [2021-06-12 15:27:33,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:33,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:33,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:33,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:33,728 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:33,919 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-06-12 15:27:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:27:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:33,921 INFO L225 Difference]: With dead ends: 2621 [2021-06-12 15:27:33,921 INFO L226 Difference]: Without dead ends: 2351 [2021-06-12 15:27:33,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:27:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-12 15:27:33,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-06-12 15:27:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.7400106553010124) internal successors, (5143), 1877 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-06-12 15:27:33,945 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-06-12 15:27:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:33,946 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-06-12 15:27:33,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-06-12 15:27:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:33,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:33,948 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:34,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:34,161 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1128050402, now seen corresponding path program 33 times [2021-06-12 15:27:34,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:34,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804942632] [2021-06-12 15:27:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:34,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804942632] [2021-06-12 15:27:34,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804942632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361495690] [2021-06-12 15:27:34,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:34,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:27:34,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:34,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:34,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:34,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361495690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:34,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:34,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:27:34,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412874063] [2021-06-12 15:27:34,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:34,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:34,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:34,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:34,402 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:34,636 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-06-12 15:27:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:27:34,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:27:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:34,639 INFO L225 Difference]: With dead ends: 2841 [2021-06-12 15:27:34,639 INFO L226 Difference]: Without dead ends: 2571 [2021-06-12 15:27:34,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:27:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-12 15:27:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-06-12 15:27:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.75) internal successors, (5368), 1952 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-06-12 15:27:34,662 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-06-12 15:27:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:34,662 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-06-12 15:27:34,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-06-12 15:27:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:34,664 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:34,664 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:34,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 15:27:34,873 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1043015664, now seen corresponding path program 34 times [2021-06-12 15:27:34,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:34,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535529732] [2021-06-12 15:27:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:34,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:34,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535529732] [2021-06-12 15:27:34,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535529732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:34,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735784765] [2021-06-12 15:27:34,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:35,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:35,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:35,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735784765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:35,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:35,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:27:35,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969371569] [2021-06-12 15:27:35,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:35,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:35,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:35,102 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:35,320 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-06-12 15:27:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:35,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:27:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:35,323 INFO L225 Difference]: With dead ends: 2871 [2021-06-12 15:27:35,323 INFO L226 Difference]: Without dead ends: 2601 [2021-06-12 15:27:35,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:27:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-12 15:27:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-06-12 15:27:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.759250123334978) internal successors, (5593), 2027 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-06-12 15:27:35,347 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-06-12 15:27:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:35,347 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-06-12 15:27:35,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-06-12 15:27:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:35,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:35,349 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:35,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 15:27:35,565 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:35,565 INFO L82 PathProgramCache]: Analyzing trace with hash 974864608, now seen corresponding path program 35 times [2021-06-12 15:27:35,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:35,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360920991] [2021-06-12 15:27:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:35,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:35,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360920991] [2021-06-12 15:27:35,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360920991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:35,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839829721] [2021-06-12 15:27:35,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:35,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:27:35,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:35,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:35,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839829721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:35,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:35,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:27:35,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140611201] [2021-06-12 15:27:35,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:35,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:35,809 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:36,084 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-06-12 15:27:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:36,084 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:27:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:36,087 INFO L225 Difference]: With dead ends: 2896 [2021-06-12 15:27:36,087 INFO L226 Difference]: Without dead ends: 2626 [2021-06-12 15:27:36,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:27:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-12 15:27:36,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-06-12 15:27:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7678401522359657) internal successors, (5818), 2102 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-06-12 15:27:36,111 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-06-12 15:27:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:36,111 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-06-12 15:27:36,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:36,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-06-12 15:27:36,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:36,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:36,113 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:36,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:36,313 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:36,314 INFO L82 PathProgramCache]: Analyzing trace with hash -322104466, now seen corresponding path program 36 times [2021-06-12 15:27:36,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:36,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848293986] [2021-06-12 15:27:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:36,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:36,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848293986] [2021-06-12 15:27:36,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848293986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:36,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668218744] [2021-06-12 15:27:36,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:36,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:27:36,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:36,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:36,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668218744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:36,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:36,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:27:36,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065475140] [2021-06-12 15:27:36,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:36,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:36,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:36,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:36,534 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:36,778 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-06-12 15:27:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:27:36,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:27:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:36,780 INFO L225 Difference]: With dead ends: 2966 [2021-06-12 15:27:36,780 INFO L226 Difference]: Without dead ends: 2696 [2021-06-12 15:27:36,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:27:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-12 15:27:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-06-12 15:27:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.782728525493799) internal successors, (6058), 2177 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-06-12 15:27:36,802 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-06-12 15:27:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:36,802 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-06-12 15:27:36,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-06-12 15:27:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:36,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:36,804 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:37,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 15:27:37,020 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:37,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:37,021 INFO L82 PathProgramCache]: Analyzing trace with hash 107649118, now seen corresponding path program 37 times [2021-06-12 15:27:37,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:37,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403676179] [2021-06-12 15:27:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:37,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:37,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403676179] [2021-06-12 15:27:37,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403676179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:37,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722065231] [2021-06-12 15:27:37,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:37,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:37,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722065231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:37,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:37,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:27:37,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588915491] [2021-06-12 15:27:37,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:37,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:37,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:37,244 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:37,606 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-06-12 15:27:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:37,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:27:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:37,609 INFO L225 Difference]: With dead ends: 3544 [2021-06-12 15:27:37,609 INFO L226 Difference]: Without dead ends: 2921 [2021-06-12 15:27:37,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:27:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-12 15:27:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-06-12 15:27:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-12 15:27:37,633 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-12 15:27:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:37,633 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-12 15:27:37,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-12 15:27:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:37,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:37,635 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:37,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:37,851 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:37,852 INFO L82 PathProgramCache]: Analyzing trace with hash 49914988, now seen corresponding path program 38 times [2021-06-12 15:27:37,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:37,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620817286] [2021-06-12 15:27:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:37,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:37,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620817286] [2021-06-12 15:27:37,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620817286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:37,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759417072] [2021-06-12 15:27:37,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:38,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:38,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:38,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:38,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:38,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759417072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:38,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:38,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:27:38,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051840391] [2021-06-12 15:27:38,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:38,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:38,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:38,075 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:38,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:38,347 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-12 15:27:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:38,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:27:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:38,351 INFO L225 Difference]: With dead ends: 3748 [2021-06-12 15:27:38,351 INFO L226 Difference]: Without dead ends: 3478 [2021-06-12 15:27:38,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:38,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-12 15:27:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-12 15:27:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-12 15:27:38,384 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-12 15:27:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:38,384 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-12 15:27:38,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-12 15:27:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:38,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:38,387 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:38,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 15:27:38,593 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash 72258238, now seen corresponding path program 39 times [2021-06-12 15:27:38,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:38,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80458736] [2021-06-12 15:27:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:38,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:38,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80458736] [2021-06-12 15:27:38,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80458736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:38,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649439429] [2021-06-12 15:27:38,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:38,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:27:38,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:38,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:38,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:38,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649439429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:38,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:38,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-12 15:27:38,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231909630] [2021-06-12 15:27:38,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:38,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:38,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:38,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:38,821 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:39,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:39,248 INFO L93 Difference]: Finished difference Result 3616 states and 9736 transitions. [2021-06-12 15:27:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:27:39,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:27:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:39,251 INFO L225 Difference]: With dead ends: 3616 [2021-06-12 15:27:39,251 INFO L226 Difference]: Without dead ends: 3041 [2021-06-12 15:27:39,251 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:27:39,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-06-12 15:27:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1724. [2021-06-12 15:27:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 2.731282646546721) internal successors, (4706), 1723 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4706 transitions. [2021-06-12 15:27:39,274 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4706 transitions. Word has length 75 [2021-06-12 15:27:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:39,274 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 4706 transitions. [2021-06-12 15:27:39,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4706 transitions. [2021-06-12 15:27:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:39,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:39,276 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:39,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:39,489 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -711333330, now seen corresponding path program 40 times [2021-06-12 15:27:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:39,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073727933] [2021-06-12 15:27:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:39,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:39,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073727933] [2021-06-12 15:27:39,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073727933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:39,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639629526] [2021-06-12 15:27:39,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:39,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:39,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:39,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:39,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639629526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:39,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:39,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-12 15:27:39,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818736639] [2021-06-12 15:27:39,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:27:39,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:27:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:27:39,784 INFO L87 Difference]: Start difference. First operand 1724 states and 4706 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:40,014 INFO L93 Difference]: Finished difference Result 2614 states and 6806 transitions. [2021-06-12 15:27:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:27:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:40,017 INFO L225 Difference]: With dead ends: 2614 [2021-06-12 15:27:40,017 INFO L226 Difference]: Without dead ends: 2280 [2021-06-12 15:27:40,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-12 15:27:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1809. [2021-06-12 15:27:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 2.6969026548672566) internal successors, (4876), 1808 states have internal predecessors, (4876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 4876 transitions. [2021-06-12 15:27:40,044 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 4876 transitions. Word has length 80 [2021-06-12 15:27:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:40,044 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 4876 transitions. [2021-06-12 15:27:40,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 4876 transitions. [2021-06-12 15:27:40,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:40,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:40,046 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:40,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 15:27:40,247 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:40,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:40,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2057763374, now seen corresponding path program 41 times [2021-06-12 15:27:40,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:40,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055981796] [2021-06-12 15:27:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:40,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:40,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055981796] [2021-06-12 15:27:40,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055981796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:40,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754262285] [2021-06-12 15:27:40,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:40,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:27:40,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:40,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:40,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:40,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754262285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:40,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:40,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:27:40,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663358112] [2021-06-12 15:27:40,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:40,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:40,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:40,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:40,510 INFO L87 Difference]: Start difference. First operand 1809 states and 4876 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:40,674 INFO L93 Difference]: Finished difference Result 3036 states and 7587 transitions. [2021-06-12 15:27:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:27:40,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:40,677 INFO L225 Difference]: With dead ends: 3036 [2021-06-12 15:27:40,677 INFO L226 Difference]: Without dead ends: 2766 [2021-06-12 15:27:40,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:27:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-12 15:27:40,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1953. [2021-06-12 15:27:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.711577868852459) internal successors, (5293), 1952 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:40,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5293 transitions. [2021-06-12 15:27:40,699 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5293 transitions. Word has length 80 [2021-06-12 15:27:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:40,700 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5293 transitions. [2021-06-12 15:27:40,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5293 transitions. [2021-06-12 15:27:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:40,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:40,704 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:40,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 15:27:40,913 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1337149122, now seen corresponding path program 42 times [2021-06-12 15:27:40,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:40,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329948538] [2021-06-12 15:27:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:41,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329948538] [2021-06-12 15:27:41,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329948538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112691998] [2021-06-12 15:27:41,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:41,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:27:41,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:41,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:41,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:41,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112691998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:41,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:41,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:27:41,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153961061] [2021-06-12 15:27:41,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:41,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:41,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:41,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:41,184 INFO L87 Difference]: Start difference. First operand 1953 states and 5293 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:41,422 INFO L93 Difference]: Finished difference Result 2996 states and 7582 transitions. [2021-06-12 15:27:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:27:41,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:41,425 INFO L225 Difference]: With dead ends: 2996 [2021-06-12 15:27:41,425 INFO L226 Difference]: Without dead ends: 2726 [2021-06-12 15:27:41,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:27:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-12 15:27:41,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2028. [2021-06-12 15:27:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.7222496299950665) internal successors, (5518), 2027 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5518 transitions. [2021-06-12 15:27:41,448 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5518 transitions. Word has length 80 [2021-06-12 15:27:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:41,448 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5518 transitions. [2021-06-12 15:27:41,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5518 transitions. [2021-06-12 15:27:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:41,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:41,450 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:41,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:41,652 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash 908084816, now seen corresponding path program 43 times [2021-06-12 15:27:41,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:41,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355010062] [2021-06-12 15:27:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:41,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:41,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355010062] [2021-06-12 15:27:41,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355010062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:41,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581248553] [2021-06-12 15:27:41,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:41,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:41,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:41,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581248553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:41,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:41,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:27:41,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042336868] [2021-06-12 15:27:41,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:41,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:41,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:41,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:41,904 INFO L87 Difference]: Start difference. First operand 2028 states and 5518 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:42,112 INFO L93 Difference]: Finished difference Result 3046 states and 7757 transitions. [2021-06-12 15:27:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:27:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:42,115 INFO L225 Difference]: With dead ends: 3046 [2021-06-12 15:27:42,115 INFO L226 Difference]: Without dead ends: 2776 [2021-06-12 15:27:42,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:27:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-12 15:27:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2103. [2021-06-12 15:27:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7321598477640343) internal successors, (5743), 2102 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5743 transitions. [2021-06-12 15:27:42,139 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5743 transitions. Word has length 80 [2021-06-12 15:27:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:42,139 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5743 transitions. [2021-06-12 15:27:42,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5743 transitions. [2021-06-12 15:27:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:42,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:42,141 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:42,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 15:27:42,341 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:42,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:42,342 INFO L82 PathProgramCache]: Analyzing trace with hash 221901632, now seen corresponding path program 44 times [2021-06-12 15:27:42,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:42,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205047184] [2021-06-12 15:27:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:42,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:42,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205047184] [2021-06-12 15:27:42,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205047184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:42,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775290229] [2021-06-12 15:27:42,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:42,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:42,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:42,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:42,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:42,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775290229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:42,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:42,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:27:42,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247089279] [2021-06-12 15:27:42,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:42,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:42,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:42,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:42,649 INFO L87 Difference]: Start difference. First operand 2103 states and 5743 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:42,922 INFO L93 Difference]: Finished difference Result 3071 states and 7882 transitions. [2021-06-12 15:27:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:42,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:42,925 INFO L225 Difference]: With dead ends: 3071 [2021-06-12 15:27:42,925 INFO L226 Difference]: Without dead ends: 2801 [2021-06-12 15:27:42,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:42,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-12 15:27:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2178. [2021-06-12 15:27:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.7413872301332107) internal successors, (5968), 2177 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 5968 transitions. [2021-06-12 15:27:42,952 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 5968 transitions. Word has length 80 [2021-06-12 15:27:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:42,952 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 5968 transitions. [2021-06-12 15:27:42,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 5968 transitions. [2021-06-12 15:27:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:42,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:42,953 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:43,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:43,165 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:43,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash 136866894, now seen corresponding path program 45 times [2021-06-12 15:27:43,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:43,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308277290] [2021-06-12 15:27:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:43,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308277290] [2021-06-12 15:27:43,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308277290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:43,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446801801] [2021-06-12 15:27:43,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:43,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:27:43,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:43,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:43,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:43,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446801801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:43,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:43,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:27:43,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363136954] [2021-06-12 15:27:43,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:43,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:43,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:43,422 INFO L87 Difference]: Start difference. First operand 2178 states and 5968 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:43,669 INFO L93 Difference]: Finished difference Result 3096 states and 8007 transitions. [2021-06-12 15:27:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:43,672 INFO L225 Difference]: With dead ends: 3096 [2021-06-12 15:27:43,672 INFO L226 Difference]: Without dead ends: 2826 [2021-06-12 15:27:43,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:27:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-12 15:27:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-06-12 15:27:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.75) internal successors, (6193), 2252 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6193 transitions. [2021-06-12 15:27:43,694 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6193 transitions. Word has length 80 [2021-06-12 15:27:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:43,695 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6193 transitions. [2021-06-12 15:27:43,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6193 transitions. [2021-06-12 15:27:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:43,696 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:43,696 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:43,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:43,897 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:43,897 INFO L82 PathProgramCache]: Analyzing trace with hash 68715838, now seen corresponding path program 46 times [2021-06-12 15:27:43,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:43,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629553744] [2021-06-12 15:27:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:43,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:43,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629553744] [2021-06-12 15:27:43,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629553744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:43,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433562827] [2021-06-12 15:27:43,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:44,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:44,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:44,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:44,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:44,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433562827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:44,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:44,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:27:44,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926202325] [2021-06-12 15:27:44,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:44,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:44,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:44,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:44,148 INFO L87 Difference]: Start difference. First operand 2253 states and 6193 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:44,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:44,482 INFO L93 Difference]: Finished difference Result 3121 states and 8132 transitions. [2021-06-12 15:27:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:27:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:44,484 INFO L225 Difference]: With dead ends: 3121 [2021-06-12 15:27:44,484 INFO L226 Difference]: Without dead ends: 2851 [2021-06-12 15:27:44,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:27:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-12 15:27:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2328. [2021-06-12 15:27:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.758057584873227) internal successors, (6418), 2327 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6418 transitions. [2021-06-12 15:27:44,506 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6418 transitions. Word has length 80 [2021-06-12 15:27:44,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:44,506 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6418 transitions. [2021-06-12 15:27:44,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6418 transitions. [2021-06-12 15:27:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:44,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:44,508 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:44,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 15:27:44,709 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1228253236, now seen corresponding path program 47 times [2021-06-12 15:27:44,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:44,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622177078] [2021-06-12 15:27:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:44,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:44,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622177078] [2021-06-12 15:27:44,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622177078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:44,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853527590] [2021-06-12 15:27:44,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:44,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:27:44,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:44,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:44,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853527590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:44,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:44,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:27:44,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781970383] [2021-06-12 15:27:44,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:44,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:44,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:44,946 INFO L87 Difference]: Start difference. First operand 2328 states and 6418 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:45,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:45,217 INFO L93 Difference]: Finished difference Result 3191 states and 8377 transitions. [2021-06-12 15:27:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:27:45,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:45,220 INFO L225 Difference]: With dead ends: 3191 [2021-06-12 15:27:45,221 INFO L226 Difference]: Without dead ends: 2921 [2021-06-12 15:27:45,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-12 15:27:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2403. [2021-06-12 15:27:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2402 states have (on average 2.7718567860116567) internal successors, (6658), 2402 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 6658 transitions. [2021-06-12 15:27:45,248 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 6658 transitions. Word has length 80 [2021-06-12 15:27:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:45,248 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 6658 transitions. [2021-06-12 15:27:45,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 6658 transitions. [2021-06-12 15:27:45,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:45,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:45,250 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:45,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:45,451 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:45,451 INFO L82 PathProgramCache]: Analyzing trace with hash -798499652, now seen corresponding path program 48 times [2021-06-12 15:27:45,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:45,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134786896] [2021-06-12 15:27:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:45,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:45,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134786896] [2021-06-12 15:27:45,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134786896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:45,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312864281] [2021-06-12 15:27:45,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:45,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:27:45,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:45,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:27:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:45,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312864281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:45,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:45,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:27:45,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603594186] [2021-06-12 15:27:45,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:45,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:45,714 INFO L87 Difference]: Start difference. First operand 2403 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:46,076 INFO L93 Difference]: Finished difference Result 3769 states and 10003 transitions. [2021-06-12 15:27:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:46,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:46,080 INFO L225 Difference]: With dead ends: 3769 [2021-06-12 15:27:46,080 INFO L226 Difference]: Without dead ends: 3146 [2021-06-12 15:27:46,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:27:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-06-12 15:27:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2478. [2021-06-12 15:27:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7807832054905126) internal successors, (6888), 2477 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6888 transitions. [2021-06-12 15:27:46,105 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6888 transitions. Word has length 80 [2021-06-12 15:27:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:46,105 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6888 transitions. [2021-06-12 15:27:46,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6888 transitions. [2021-06-12 15:27:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:46,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:46,107 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:46,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 15:27:46,308 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:46,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:46,308 INFO L82 PathProgramCache]: Analyzing trace with hash -856233782, now seen corresponding path program 49 times [2021-06-12 15:27:46,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:46,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602481385] [2021-06-12 15:27:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:46,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:46,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602481385] [2021-06-12 15:27:46,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602481385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:46,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910745127] [2021-06-12 15:27:46,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:46,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:46,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910745127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:46,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:46,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:27:46,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347249258] [2021-06-12 15:27:46,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:46,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:46,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:46,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:46,538 INFO L87 Difference]: Start difference. First operand 2478 states and 6888 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:46,865 INFO L93 Difference]: Finished difference Result 3998 states and 10721 transitions. [2021-06-12 15:27:46,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:46,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:46,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:46,869 INFO L225 Difference]: With dead ends: 3998 [2021-06-12 15:27:46,869 INFO L226 Difference]: Without dead ends: 3728 [2021-06-12 15:27:46,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:27:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-06-12 15:27:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2658. [2021-06-12 15:27:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2657 states have (on average 2.8027850959729017) internal successors, (7447), 2657 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 7447 transitions. [2021-06-12 15:27:46,899 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 7447 transitions. Word has length 80 [2021-06-12 15:27:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:46,899 INFO L482 AbstractCegarLoop]: Abstraction has 2658 states and 7447 transitions. [2021-06-12 15:27:46,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 7447 transitions. [2021-06-12 15:27:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:46,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:46,902 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:47,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 15:27:47,105 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash -833890532, now seen corresponding path program 50 times [2021-06-12 15:27:47,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:47,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908453852] [2021-06-12 15:27:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:47,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:47,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908453852] [2021-06-12 15:27:47,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908453852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:47,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532497575] [2021-06-12 15:27:47,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:47,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:47,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532497575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:47,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:47,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:27:47,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930422246] [2021-06-12 15:27:47,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:47,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:47,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:47,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:47,342 INFO L87 Difference]: Start difference. First operand 2658 states and 7447 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:47,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:47,783 INFO L93 Difference]: Finished difference Result 3821 states and 10221 transitions. [2021-06-12 15:27:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:27:47,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:27:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:47,786 INFO L225 Difference]: With dead ends: 3821 [2021-06-12 15:27:47,786 INFO L226 Difference]: Without dead ends: 3246 [2021-06-12 15:27:47,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:27:47,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-06-12 15:27:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 2003. [2021-06-12 15:27:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 2.7312687312687314) internal successors, (5468), 2002 states have internal predecessors, (5468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:47,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 5468 transitions. [2021-06-12 15:27:47,813 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 5468 transitions. Word has length 80 [2021-06-12 15:27:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:47,813 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 5468 transitions. [2021-06-12 15:27:47,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 5468 transitions. [2021-06-12 15:27:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:47,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:47,815 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:48,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 15:27:48,015 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:48,016 INFO L82 PathProgramCache]: Analyzing trace with hash 498592931, now seen corresponding path program 51 times [2021-06-12 15:27:48,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:48,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321876029] [2021-06-12 15:27:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:48,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:48,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321876029] [2021-06-12 15:27:48,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321876029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:48,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113998849] [2021-06-12 15:27:48,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:48,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:27:48,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:48,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:48,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113998849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:48,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:48,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:27:48,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642210682] [2021-06-12 15:27:48,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:48,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:48,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:48,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:48,296 INFO L87 Difference]: Start difference. First operand 2003 states and 5468 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:48,518 INFO L93 Difference]: Finished difference Result 2921 states and 7507 transitions. [2021-06-12 15:27:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:27:48,519 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:27:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:48,521 INFO L225 Difference]: With dead ends: 2921 [2021-06-12 15:27:48,521 INFO L226 Difference]: Without dead ends: 2651 [2021-06-12 15:27:48,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:27:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-12 15:27:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2078. [2021-06-12 15:27:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 2.740972556571979) internal successors, (5693), 2077 states have internal predecessors, (5693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 5693 transitions. [2021-06-12 15:27:48,542 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 5693 transitions. Word has length 85 [2021-06-12 15:27:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:48,542 INFO L482 AbstractCegarLoop]: Abstraction has 2078 states and 5693 transitions. [2021-06-12 15:27:48,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 5693 transitions. [2021-06-12 15:27:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:48,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:48,544 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:48,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 15:27:48,744 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:48,744 INFO L82 PathProgramCache]: Analyzing trace with hash -401461869, now seen corresponding path program 52 times [2021-06-12 15:27:48,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:48,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3021114] [2021-06-12 15:27:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:48,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:48,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3021114] [2021-06-12 15:27:48,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3021114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:48,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098655153] [2021-06-12 15:27:48,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:48,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:48,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:48,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:48,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:49,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098655153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:49,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:49,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:27:49,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583616683] [2021-06-12 15:27:49,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:49,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:49,042 INFO L87 Difference]: Start difference. First operand 2078 states and 5693 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:49,308 INFO L93 Difference]: Finished difference Result 3191 states and 8122 transitions. [2021-06-12 15:27:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:27:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:49,311 INFO L225 Difference]: With dead ends: 3191 [2021-06-12 15:27:49,311 INFO L226 Difference]: Without dead ends: 2921 [2021-06-12 15:27:49,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:27:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-12 15:27:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2153. [2021-06-12 15:27:49,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.75) internal successors, (5918), 2152 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5918 transitions. [2021-06-12 15:27:49,332 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5918 transitions. Word has length 85 [2021-06-12 15:27:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:49,332 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5918 transitions. [2021-06-12 15:27:49,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5918 transitions. [2021-06-12 15:27:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:49,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:49,334 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:49,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:49,534 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:49,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:49,534 INFO L82 PathProgramCache]: Analyzing trace with hash -830526175, now seen corresponding path program 53 times [2021-06-12 15:27:49,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:49,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269874727] [2021-06-12 15:27:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:49,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:49,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269874727] [2021-06-12 15:27:49,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269874727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:49,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640995409] [2021-06-12 15:27:49,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:49,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:27:49,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:49,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:49,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:49,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640995409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:49,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:49,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:27:49,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412624807] [2021-06-12 15:27:49,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:49,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:49,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:49,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:49,813 INFO L87 Difference]: Start difference. First operand 2153 states and 5918 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:50,068 INFO L93 Difference]: Finished difference Result 3221 states and 8257 transitions. [2021-06-12 15:27:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:27:50,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:27:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:50,071 INFO L225 Difference]: With dead ends: 3221 [2021-06-12 15:27:50,071 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 15:27:50,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:27:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 15:27:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2228. [2021-06-12 15:27:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.7584193982936687) internal successors, (6143), 2227 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6143 transitions. [2021-06-12 15:27:50,106 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6143 transitions. Word has length 85 [2021-06-12 15:27:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:50,106 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6143 transitions. [2021-06-12 15:27:50,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6143 transitions. [2021-06-12 15:27:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:50,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:50,108 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:50,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:50,309 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1516709359, now seen corresponding path program 54 times [2021-06-12 15:27:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:50,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90414119] [2021-06-12 15:27:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:50,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:50,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90414119] [2021-06-12 15:27:50,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90414119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:50,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78061284] [2021-06-12 15:27:50,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:50,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:27:50,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:50,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:50,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:50,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78061284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:50,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:50,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:27:50,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623762955] [2021-06-12 15:27:50,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:50,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:50,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:50,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:50,615 INFO L87 Difference]: Start difference. First operand 2228 states and 6143 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:50,936 INFO L93 Difference]: Finished difference Result 3246 states and 8382 transitions. [2021-06-12 15:27:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:27:50,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:27:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:50,939 INFO L225 Difference]: With dead ends: 3246 [2021-06-12 15:27:50,939 INFO L226 Difference]: Without dead ends: 2976 [2021-06-12 15:27:50,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-12 15:27:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2303. [2021-06-12 15:27:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7662901824500437) internal successors, (6368), 2302 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6368 transitions. [2021-06-12 15:27:50,964 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6368 transitions. Word has length 85 [2021-06-12 15:27:50,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:50,964 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6368 transitions. [2021-06-12 15:27:50,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6368 transitions. [2021-06-12 15:27:50,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:50,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:50,966 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:51,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:51,167 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:51,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:51,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1601744097, now seen corresponding path program 55 times [2021-06-12 15:27:51,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:51,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009741708] [2021-06-12 15:27:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:51,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:51,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009741708] [2021-06-12 15:27:51,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009741708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:51,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403454447] [2021-06-12 15:27:51,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:51,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:51,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403454447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:51,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:51,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:27:51,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503335547] [2021-06-12 15:27:51,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:51,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:51,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:51,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:51,436 INFO L87 Difference]: Start difference. First operand 2303 states and 6368 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:51,719 INFO L93 Difference]: Finished difference Result 3271 states and 8507 transitions. [2021-06-12 15:27:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:51,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:27:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:51,722 INFO L225 Difference]: With dead ends: 3271 [2021-06-12 15:27:51,722 INFO L226 Difference]: Without dead ends: 3001 [2021-06-12 15:27:51,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-12 15:27:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2378. [2021-06-12 15:27:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7736642827092974) internal successors, (6593), 2377 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:51,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6593 transitions. [2021-06-12 15:27:51,749 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6593 transitions. Word has length 85 [2021-06-12 15:27:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:51,749 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6593 transitions. [2021-06-12 15:27:51,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6593 transitions. [2021-06-12 15:27:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:51,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:51,751 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:51,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 15:27:51,951 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:51,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1669895153, now seen corresponding path program 56 times [2021-06-12 15:27:51,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:51,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463676922] [2021-06-12 15:27:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:52,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:52,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463676922] [2021-06-12 15:27:52,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463676922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:52,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028360286] [2021-06-12 15:27:52,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:52,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:52,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:52,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:52,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:52,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028360286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:52,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:52,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:27:52,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301750144] [2021-06-12 15:27:52,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:52,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:52,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:52,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:52,213 INFO L87 Difference]: Start difference. First operand 2378 states and 6593 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:52,562 INFO L93 Difference]: Finished difference Result 3296 states and 8632 transitions. [2021-06-12 15:27:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:52,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:27:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:52,565 INFO L225 Difference]: With dead ends: 3296 [2021-06-12 15:27:52,565 INFO L226 Difference]: Without dead ends: 3026 [2021-06-12 15:27:52,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:27:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-06-12 15:27:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2453. [2021-06-12 15:27:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.7805872756933114) internal successors, (6818), 2452 states have internal predecessors, (6818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6818 transitions. [2021-06-12 15:27:52,590 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6818 transitions. Word has length 85 [2021-06-12 15:27:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:52,590 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6818 transitions. [2021-06-12 15:27:52,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6818 transitions. [2021-06-12 15:27:52,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:52,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:52,592 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:52,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:52,792 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:52,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:52,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1328103069, now seen corresponding path program 57 times [2021-06-12 15:27:52,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:52,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271231560] [2021-06-12 15:27:52,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:52,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:52,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271231560] [2021-06-12 15:27:52,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271231560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:52,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112418540] [2021-06-12 15:27:52,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:52,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:27:52,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:52,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:52,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:53,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112418540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:53,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:53,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:27:53,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785431834] [2021-06-12 15:27:53,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:53,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:53,047 INFO L87 Difference]: Start difference. First operand 2453 states and 6818 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:53,350 INFO L93 Difference]: Finished difference Result 3366 states and 8877 transitions. [2021-06-12 15:27:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:27:53,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:27:53,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:53,354 INFO L225 Difference]: With dead ends: 3366 [2021-06-12 15:27:53,354 INFO L226 Difference]: Without dead ends: 3096 [2021-06-12 15:27:53,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:27:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-06-12 15:27:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2528. [2021-06-12 15:27:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7930352196280173) internal successors, (7058), 2527 states have internal predecessors, (7058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 7058 transitions. [2021-06-12 15:27:53,383 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 7058 transitions. Word has length 85 [2021-06-12 15:27:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:53,383 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 7058 transitions. [2021-06-12 15:27:53,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 7058 transitions. [2021-06-12 15:27:53,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:53,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:53,385 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:53,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 15:27:53,586 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:53,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1757856653, now seen corresponding path program 58 times [2021-06-12 15:27:53,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:53,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26971067] [2021-06-12 15:27:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:53,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:53,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26971067] [2021-06-12 15:27:53,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26971067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:53,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781739438] [2021-06-12 15:27:53,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:53,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:53,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:53,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:53,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:53,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781739438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:53,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:53,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:27:53,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800265031] [2021-06-12 15:27:53,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:53,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:53,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:53,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:53,861 INFO L87 Difference]: Start difference. First operand 2528 states and 7058 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:54,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:54,325 INFO L93 Difference]: Finished difference Result 3944 states and 10503 transitions. [2021-06-12 15:27:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:27:54,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:27:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:54,328 INFO L225 Difference]: With dead ends: 3944 [2021-06-12 15:27:54,329 INFO L226 Difference]: Without dead ends: 3321 [2021-06-12 15:27:54,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:27:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-12 15:27:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2603. [2021-06-12 15:27:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.800922367409685) internal successors, (7288), 2602 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-12 15:27:54,354 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-12 15:27:54,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:54,354 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-12 15:27:54,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-12 15:27:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:54,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:54,356 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:54,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:54,557 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:54,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1700122523, now seen corresponding path program 59 times [2021-06-12 15:27:54,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:54,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605815732] [2021-06-12 15:27:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:54,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:54,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605815732] [2021-06-12 15:27:54,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605815732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:54,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413013524] [2021-06-12 15:27:54,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:54,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:27:54,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:54,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:54,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:54,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413013524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:54,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:54,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:27:54,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084297301] [2021-06-12 15:27:54,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:54,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:54,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:54,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:54,817 INFO L87 Difference]: Start difference. First operand 2603 states and 7288 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:55,136 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-12 15:27:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:27:55,137 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:27:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:55,140 INFO L225 Difference]: With dead ends: 4148 [2021-06-12 15:27:55,141 INFO L226 Difference]: Without dead ends: 3878 [2021-06-12 15:27:55,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:27:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-12 15:27:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-12 15:27:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.8206326383896476) internal successors, (7847), 2782 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-12 15:27:55,169 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-12 15:27:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:55,169 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-12 15:27:55,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-12 15:27:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:55,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:55,171 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:55,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 15:27:55,371 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:55,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1722465773, now seen corresponding path program 60 times [2021-06-12 15:27:55,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:55,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518936797] [2021-06-12 15:27:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:55,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:55,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518936797] [2021-06-12 15:27:55,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518936797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:55,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257939695] [2021-06-12 15:27:55,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:55,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:27:55,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:55,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:55,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:55,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257939695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:55,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:55,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:27:55,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680084838] [2021-06-12 15:27:55,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:55,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:55,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:55,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:55,655 INFO L87 Difference]: Start difference. First operand 2783 states and 7847 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:56,127 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-12 15:27:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:27:56,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:27:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:56,131 INFO L225 Difference]: With dead ends: 4016 [2021-06-12 15:27:56,131 INFO L226 Difference]: Without dead ends: 3441 [2021-06-12 15:27:56,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 410.2ms TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:27:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-12 15:27:56,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-12 15:27:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-12 15:27:56,156 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-12 15:27:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:56,156 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-12 15:27:56,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-12 15:27:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:56,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:56,158 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:56,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:56,359 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:56,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:56,359 INFO L82 PathProgramCache]: Analyzing trace with hash -750339617, now seen corresponding path program 61 times [2021-06-12 15:27:56,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:56,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320320565] [2021-06-12 15:27:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:56,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320320565] [2021-06-12 15:27:56,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320320565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053993706] [2021-06-12 15:27:56,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:56,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:27:56,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:56,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053993706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:56,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:56,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-12 15:27:56,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361711424] [2021-06-12 15:27:56,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:27:56,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:56,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:27:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:56,701 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:56,988 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-12 15:27:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:27:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:56,990 INFO L225 Difference]: With dead ends: 2864 [2021-06-12 15:27:56,991 INFO L226 Difference]: Without dead ends: 2530 [2021-06-12 15:27:56,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-12 15:27:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-12 15:27:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.702191235059761) internal successors, (5426), 2008 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-12 15:27:57,011 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-12 15:27:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:57,012 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-12 15:27:57,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-12 15:27:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:57,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:57,013 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:57,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 15:27:57,229 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:57,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1583179645, now seen corresponding path program 62 times [2021-06-12 15:27:57,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:57,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373457870] [2021-06-12 15:27:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:57,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:57,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373457870] [2021-06-12 15:27:57,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373457870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:57,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316373461] [2021-06-12 15:27:57,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:57,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:57,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:57,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:57,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:57,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316373461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:57,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:57,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:27:57,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6525166] [2021-06-12 15:27:57,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:57,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:57,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:57,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:57,516 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:57,727 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-12 15:27:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:57,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:27:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:57,730 INFO L225 Difference]: With dead ends: 3386 [2021-06-12 15:27:57,730 INFO L226 Difference]: Without dead ends: 3116 [2021-06-12 15:27:57,731 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:27:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-12 15:27:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-12 15:27:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.715148698884758) internal successors, (5843), 2152 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:57,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-12 15:27:57,754 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-12 15:27:57,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:57,754 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-12 15:27:57,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:57,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-12 15:27:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:57,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:57,767 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:57,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-12 15:27:57,967 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:57,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:57,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2037093005, now seen corresponding path program 63 times [2021-06-12 15:27:57,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:57,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593145650] [2021-06-12 15:27:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:58,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:58,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593145650] [2021-06-12 15:27:58,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593145650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:58,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505744443] [2021-06-12 15:27:58,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:58,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:27:58,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:58,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:58,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:58,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505744443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:58,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:58,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:27:58,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195591544] [2021-06-12 15:27:58,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:58,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:58,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:58,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:58,322 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:58,598 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-12 15:27:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:58,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:27:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:58,601 INFO L225 Difference]: With dead ends: 3346 [2021-06-12 15:27:58,601 INFO L226 Difference]: Without dead ends: 3076 [2021-06-12 15:27:58,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:27:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-12 15:27:58,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-12 15:27:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.724741805118994) internal successors, (6068), 2227 states have internal predecessors, (6068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-12 15:27:58,626 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-12 15:27:58,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:58,626 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-12 15:27:58,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:58,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-12 15:27:58,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:58,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:58,628 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:58,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:58,841 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:58,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1159081087, now seen corresponding path program 64 times [2021-06-12 15:27:58,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:58,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083077532] [2021-06-12 15:27:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:58,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:58,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083077532] [2021-06-12 15:27:58,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083077532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:58,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57220847] [2021-06-12 15:27:58,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:59,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:59,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:59,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:59,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57220847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:59,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:59,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:27:59,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799778961] [2021-06-12 15:27:59,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:59,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:59,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:59,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:59,122 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:59,385 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-12 15:27:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:59,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:27:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:59,388 INFO L225 Difference]: With dead ends: 3396 [2021-06-12 15:27:59,388 INFO L226 Difference]: Without dead ends: 3126 [2021-06-12 15:27:59,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:27:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-12 15:27:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-12 15:27:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7337098175499563) internal successors, (6293), 2302 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-12 15:27:59,429 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-12 15:27:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:59,429 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-12 15:27:59,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-12 15:27:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:59,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:59,432 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:27:59,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:59,633 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:59,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:59,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2059135887, now seen corresponding path program 65 times [2021-06-12 15:27:59,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:59,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938998523] [2021-06-12 15:27:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:59,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:59,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938998523] [2021-06-12 15:27:59,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938998523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:59,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681834180] [2021-06-12 15:27:59,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:59,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:27:59,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:59,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681834180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:59,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:59,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:27:59,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466295610] [2021-06-12 15:27:59,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:59,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:59,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:59,921 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:00,298 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-12 15:28:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:28:00,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:28:00,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:00,301 INFO L225 Difference]: With dead ends: 3421 [2021-06-12 15:28:00,301 INFO L226 Difference]: Without dead ends: 3151 [2021-06-12 15:28:00,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:28:00,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-12 15:28:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-12 15:28:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7421119057635677) internal successors, (6518), 2377 states have internal predecessors, (6518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-12 15:28:00,328 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-12 15:28:00,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:00,328 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-12 15:28:00,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-12 15:28:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:28:00,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:00,330 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:00,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 15:28:00,530 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:00,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1806767103, now seen corresponding path program 66 times [2021-06-12 15:28:00,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:00,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977932490] [2021-06-12 15:28:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:00,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:00,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977932490] [2021-06-12 15:28:00,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977932490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:00,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658414193] [2021-06-12 15:28:00,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:00,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:28:00,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:00,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:28:00,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:00,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658414193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:00,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:00,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:28:00,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898163890] [2021-06-12 15:28:00,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:28:00,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:00,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:28:00,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:28:00,784 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:01,085 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-12 15:28:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:28:01,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:28:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:01,088 INFO L225 Difference]: With dead ends: 3446 [2021-06-12 15:28:01,088 INFO L226 Difference]: Without dead ends: 3176 [2021-06-12 15:28:01,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:28:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-12 15:28:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-12 15:28:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.75) internal successors, (6743), 2452 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-12 15:28:01,118 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-12 15:28:01,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:01,118 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-12 15:28:01,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-12 15:28:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:28:01,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:01,120 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:01,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:01,320 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:01,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1120583919, now seen corresponding path program 67 times [2021-06-12 15:28:01,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:01,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956033211] [2021-06-12 15:28:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:01,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:01,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956033211] [2021-06-12 15:28:01,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956033211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:01,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360669959] [2021-06-12 15:28:01,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:28:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:01,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360669959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:01,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:01,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:28:01,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131982116] [2021-06-12 15:28:01,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:01,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:01,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:01,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:01,597 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:01,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:01,978 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-12 15:28:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:01,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:28:01,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:01,981 INFO L225 Difference]: With dead ends: 3471 [2021-06-12 15:28:01,981 INFO L226 Difference]: Without dead ends: 3201 [2021-06-12 15:28:01,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:28:01,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-12 15:28:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-12 15:28:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7574198654531066) internal successors, (6968), 2527 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-12 15:28:02,005 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-12 15:28:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:02,006 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-12 15:28:02,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-12 15:28:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:28:02,008 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:02,008 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:02,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 15:28:02,224 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:02,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:02,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1035549181, now seen corresponding path program 68 times [2021-06-12 15:28:02,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:02,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266292095] [2021-06-12 15:28:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:02,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:02,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266292095] [2021-06-12 15:28:02,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266292095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:02,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172165325] [2021-06-12 15:28:02,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:02,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:02,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:28:02,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:02,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172165325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:02,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:02,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:28:02,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838671024] [2021-06-12 15:28:02,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:28:02,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:28:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:28:02,496 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:02,797 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-12 15:28:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:28:02,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:28:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:02,800 INFO L225 Difference]: With dead ends: 3496 [2021-06-12 15:28:02,800 INFO L226 Difference]: Without dead ends: 3226 [2021-06-12 15:28:02,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:28:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-12 15:28:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-12 15:28:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.764411990776326) internal successors, (7193), 2602 states have internal predecessors, (7193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-12 15:28:02,830 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-12 15:28:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:02,830 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-12 15:28:02,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-12 15:28:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:28:02,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:02,832 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:03,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:03,049 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash 967398125, now seen corresponding path program 69 times [2021-06-12 15:28:03,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:03,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827576802] [2021-06-12 15:28:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:03,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:03,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827576802] [2021-06-12 15:28:03,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827576802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:03,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002656740] [2021-06-12 15:28:03,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:03,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:28:03,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:03,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:28:03,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:03,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002656740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:03,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:03,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:28:03,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181936686] [2021-06-12 15:28:03,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:03,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:03,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:03,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:03,334 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:03,722 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-12 15:28:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:03,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:28:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:03,725 INFO L225 Difference]: With dead ends: 3521 [2021-06-12 15:28:03,725 INFO L226 Difference]: Without dead ends: 3251 [2021-06-12 15:28:03,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:28:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-12 15:28:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-12 15:28:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.771012327231976) internal successors, (7418), 2677 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-12 15:28:03,755 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-12 15:28:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:03,755 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-12 15:28:03,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-12 15:28:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:28:03,757 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:03,758 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:03,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 15:28:03,965 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:03,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:03,965 INFO L82 PathProgramCache]: Analyzing trace with hash -329570949, now seen corresponding path program 70 times [2021-06-12 15:28:03,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:03,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577729614] [2021-06-12 15:28:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:04,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:04,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577729614] [2021-06-12 15:28:04,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577729614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:04,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828637499] [2021-06-12 15:28:04,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:04,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:04,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:04,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:28:04,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:04,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828637499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:04,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:04,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:28:04,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961935455] [2021-06-12 15:28:04,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:28:04,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:28:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:28:04,261 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:04,590 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-12 15:28:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:28:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:28:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:04,594 INFO L225 Difference]: With dead ends: 3591 [2021-06-12 15:28:04,594 INFO L226 Difference]: Without dead ends: 3321 [2021-06-12 15:28:04,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:28:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-12 15:28:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-12 15:28:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.782703488372093) internal successors, (7658), 2752 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-12 15:28:04,625 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-12 15:28:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:04,625 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-12 15:28:04,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-12 15:28:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:28:04,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:04,628 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:04,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:04,837 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash 100182635, now seen corresponding path program 71 times [2021-06-12 15:28:04,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:04,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423778219] [2021-06-12 15:28:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:04,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:04,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423778219] [2021-06-12 15:28:04,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423778219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:04,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745868014] [2021-06-12 15:28:04,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:04,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:28:04,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:04,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:28:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:05,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745868014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:05,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:05,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:28:05,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868402999] [2021-06-12 15:28:05,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:05,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:05,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:05,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:05,084 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:05,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:05,566 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-12 15:28:05,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:28:05,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:28:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:05,571 INFO L225 Difference]: With dead ends: 4169 [2021-06-12 15:28:05,571 INFO L226 Difference]: Without dead ends: 3546 [2021-06-12 15:28:05,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 424.7ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:05,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-12 15:28:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-12 15:28:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.790237000353732) internal successors, (7888), 2827 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-12 15:28:05,610 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-12 15:28:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:05,610 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-12 15:28:05,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-12 15:28:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:28:05,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:05,613 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:05,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 15:28:05,813 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash 42448505, now seen corresponding path program 72 times [2021-06-12 15:28:05,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:05,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059242547] [2021-06-12 15:28:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:05,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:05,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059242547] [2021-06-12 15:28:05,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059242547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:05,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849136123] [2021-06-12 15:28:05,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:05,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:28:05,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:05,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:05,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:06,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849136123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:06,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:06,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:28:06,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541623627] [2021-06-12 15:28:06,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:28:06,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:06,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:28:06,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:28:06,062 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:06,423 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-12 15:28:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:06,423 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:28:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:06,427 INFO L225 Difference]: With dead ends: 4398 [2021-06-12 15:28:06,427 INFO L226 Difference]: Without dead ends: 4128 [2021-06-12 15:28:06,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:28:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-12 15:28:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-12 15:28:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.809112071832391) internal successors, (8447), 3007 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-12 15:28:06,463 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-12 15:28:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:06,463 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-12 15:28:06,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-12 15:28:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:28:06,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:06,466 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:06,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:06,666 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:06,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:06,666 INFO L82 PathProgramCache]: Analyzing trace with hash 64791755, now seen corresponding path program 73 times [2021-06-12 15:28:06,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:06,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387160272] [2021-06-12 15:28:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:06,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:06,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387160272] [2021-06-12 15:28:06,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387160272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:06,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725259905] [2021-06-12 15:28:06,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:28:06,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:06,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725259905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:06,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:06,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:28:06,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45709377] [2021-06-12 15:28:06,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:06,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:06,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:06,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:06,934 INFO L87 Difference]: Start difference. First operand 3008 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:07,416 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-12 15:28:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:07,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:28:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:07,420 INFO L225 Difference]: With dead ends: 3885 [2021-06-12 15:28:07,420 INFO L226 Difference]: Without dead ends: 3306 [2021-06-12 15:28:07,420 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-12 15:28:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-12 15:28:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7357954545454546) internal successors, (5778), 2112 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-12 15:28:07,445 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-12 15:28:07,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:07,445 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-12 15:28:07,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-12 15:28:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:07,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:07,446 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:07,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:07,647 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:07,647 INFO L82 PathProgramCache]: Analyzing trace with hash -472912364, now seen corresponding path program 74 times [2021-06-12 15:28:07,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:07,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023361186] [2021-06-12 15:28:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:07,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:07,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023361186] [2021-06-12 15:28:07,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023361186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:07,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059323668] [2021-06-12 15:28:07,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:07,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:07,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:07,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:07,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:07,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059323668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:07,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:07,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:07,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646483070] [2021-06-12 15:28:07,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:07,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:07,935 INFO L87 Difference]: Start difference. First operand 2113 states and 5778 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:08,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:08,186 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-12 15:28:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:28:08,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:08,190 INFO L225 Difference]: With dead ends: 3131 [2021-06-12 15:28:08,190 INFO L226 Difference]: Without dead ends: 2861 [2021-06-12 15:28:08,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:28:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-12 15:28:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-12 15:28:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.7448559670781894) internal successors, (6003), 2187 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-12 15:28:08,216 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-12 15:28:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:08,216 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-12 15:28:08,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-12 15:28:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:08,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:08,217 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:08,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:08,418 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:08,418 INFO L82 PathProgramCache]: Analyzing trace with hash -926825724, now seen corresponding path program 75 times [2021-06-12 15:28:08,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:08,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200755137] [2021-06-12 15:28:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:08,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:08,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200755137] [2021-06-12 15:28:08,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200755137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:08,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194600453] [2021-06-12 15:28:08,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:08,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:28:08,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:08,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:08,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194600453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:08,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:08,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:08,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462684241] [2021-06-12 15:28:08,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:08,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:08,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:08,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:08,747 INFO L87 Difference]: Start difference. First operand 2188 states and 6003 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:09,039 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-12 15:28:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:28:09,039 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:09,042 INFO L225 Difference]: With dead ends: 3451 [2021-06-12 15:28:09,042 INFO L226 Difference]: Without dead ends: 3181 [2021-06-12 15:28:09,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:28:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-12 15:28:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-12 15:28:09,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.753315649867374) internal successors, (6228), 2262 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-12 15:28:09,065 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-12 15:28:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:09,066 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-12 15:28:09,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-12 15:28:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:09,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:09,067 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:09,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:09,268 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:09,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash -48813806, now seen corresponding path program 76 times [2021-06-12 15:28:09,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:09,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283751268] [2021-06-12 15:28:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:09,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:09,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283751268] [2021-06-12 15:28:09,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283751268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:09,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529509633] [2021-06-12 15:28:09,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:09,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:09,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:09,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:09,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529509633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:09,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:09,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:09,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600447838] [2021-06-12 15:28:09,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:09,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:09,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:09,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:09,549 INFO L87 Difference]: Start difference. First operand 2263 states and 6228 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:09,831 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-12 15:28:09,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:28:09,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:09,834 INFO L225 Difference]: With dead ends: 3481 [2021-06-12 15:28:09,834 INFO L226 Difference]: Without dead ends: 3211 [2021-06-12 15:28:09,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:28:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-12 15:28:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-12 15:28:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.761232349165597) internal successors, (6453), 2337 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-12 15:28:09,858 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-12 15:28:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:09,858 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-12 15:28:09,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:09,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-12 15:28:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:09,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:09,860 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:10,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:10,061 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:10,061 INFO L82 PathProgramCache]: Analyzing trace with hash -948868606, now seen corresponding path program 77 times [2021-06-12 15:28:10,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:10,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57271144] [2021-06-12 15:28:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:10,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:10,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57271144] [2021-06-12 15:28:10,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57271144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:10,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693484932] [2021-06-12 15:28:10,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:10,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:28:10,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:10,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:10,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:10,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693484932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:10,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:10,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:10,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040403128] [2021-06-12 15:28:10,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:10,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:10,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:10,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:10,364 INFO L87 Difference]: Start difference. First operand 2338 states and 6453 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:10,721 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-12 15:28:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:10,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:10,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:10,725 INFO L225 Difference]: With dead ends: 3506 [2021-06-12 15:28:10,725 INFO L226 Difference]: Without dead ends: 3236 [2021-06-12 15:28:10,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:28:10,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-12 15:28:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-12 15:28:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.7686567164179103) internal successors, (6678), 2412 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-12 15:28:10,752 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-12 15:28:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:10,752 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-12 15:28:10,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-12 15:28:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:10,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:10,754 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:10,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:10,954 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:10,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1377932912, now seen corresponding path program 78 times [2021-06-12 15:28:10,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:10,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013786452] [2021-06-12 15:28:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:11,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:11,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013786452] [2021-06-12 15:28:11,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013786452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:11,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735329830] [2021-06-12 15:28:11,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:11,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:28:11,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:11,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:11,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:11,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735329830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:11,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:11,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:11,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660988602] [2021-06-12 15:28:11,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:11,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:11,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:11,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:11,229 INFO L87 Difference]: Start difference. First operand 2413 states and 6678 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:11,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:11,547 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-12 15:28:11,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:28:11,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:11,550 INFO L225 Difference]: With dead ends: 3531 [2021-06-12 15:28:11,550 INFO L226 Difference]: Without dead ends: 3261 [2021-06-12 15:28:11,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:28:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-12 15:28:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-12 15:28:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7756332931242462) internal successors, (6903), 2487 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-12 15:28:11,576 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-12 15:28:11,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:11,576 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-12 15:28:11,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-12 15:28:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:11,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:11,578 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:11,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:11,778 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:11,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:11,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2064116096, now seen corresponding path program 79 times [2021-06-12 15:28:11,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:11,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425477996] [2021-06-12 15:28:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:11,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:11,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425477996] [2021-06-12 15:28:11,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425477996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:11,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946322825] [2021-06-12 15:28:11,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:11,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:12,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946322825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:12,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:12,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:12,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042174242] [2021-06-12 15:28:12,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:12,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:12,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:12,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:12,087 INFO L87 Difference]: Start difference. First operand 2488 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:12,486 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-12 15:28:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:12,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:12,489 INFO L225 Difference]: With dead ends: 3556 [2021-06-12 15:28:12,489 INFO L226 Difference]: Without dead ends: 3286 [2021-06-12 15:28:12,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:28:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-12 15:28:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-12 15:28:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.782201405152225) internal successors, (7128), 2562 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-12 15:28:12,515 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-12 15:28:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:12,515 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-12 15:28:12,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-12 15:28:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:12,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:12,517 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:12,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 15:28:12,717 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2145816462, now seen corresponding path program 80 times [2021-06-12 15:28:12,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:12,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650576778] [2021-06-12 15:28:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:12,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:12,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650576778] [2021-06-12 15:28:12,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650576778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:12,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519459241] [2021-06-12 15:28:12,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:12,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:12,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:12,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:12,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:12,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519459241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:12,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:12,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:12,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199204760] [2021-06-12 15:28:12,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:12,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:12,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:12,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:12,980 INFO L87 Difference]: Start difference. First operand 2563 states and 7128 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:13,318 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-12 15:28:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:13,318 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:13,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:13,321 INFO L225 Difference]: With dead ends: 3581 [2021-06-12 15:28:13,322 INFO L226 Difference]: Without dead ends: 3311 [2021-06-12 15:28:13,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:28:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-12 15:28:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-12 15:28:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.78839590443686) internal successors, (7353), 2637 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-12 15:28:13,352 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-12 15:28:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:13,352 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-12 15:28:13,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-12 15:28:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:13,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:13,354 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:13,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:13,554 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:13,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:13,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2077665406, now seen corresponding path program 81 times [2021-06-12 15:28:13,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:13,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456205612] [2021-06-12 15:28:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:13,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:13,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456205612] [2021-06-12 15:28:13,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456205612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:13,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657817574] [2021-06-12 15:28:13,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:13,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:28:13,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:13,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:13,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:13,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657817574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:13,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:13,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:13,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317217654] [2021-06-12 15:28:13,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:13,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:13,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:13,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:13,832 INFO L87 Difference]: Start difference. First operand 2638 states and 7353 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:14,275 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-12 15:28:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:14,278 INFO L225 Difference]: With dead ends: 3606 [2021-06-12 15:28:14,278 INFO L226 Difference]: Without dead ends: 3336 [2021-06-12 15:28:14,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=466, Invalid=1514, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:28:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-12 15:28:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-12 15:28:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7942477876106193) internal successors, (7578), 2712 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-12 15:28:14,309 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-12 15:28:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:14,309 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-12 15:28:14,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-12 15:28:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:14,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:14,311 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:14,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 15:28:14,511 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash 780696332, now seen corresponding path program 82 times [2021-06-12 15:28:14,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:14,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899771562] [2021-06-12 15:28:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:14,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:14,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899771562] [2021-06-12 15:28:14,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899771562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:14,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778519546] [2021-06-12 15:28:14,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:14,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:14,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:14,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:14,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778519546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:14,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:14,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:14,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132545561] [2021-06-12 15:28:14,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:14,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:14,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:14,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:14,791 INFO L87 Difference]: Start difference. First operand 2713 states and 7578 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:15,179 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-12 15:28:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:15,179 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:15,183 INFO L225 Difference]: With dead ends: 3631 [2021-06-12 15:28:15,183 INFO L226 Difference]: Without dead ends: 3361 [2021-06-12 15:28:15,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:28:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-12 15:28:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-12 15:28:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.79978471474704) internal successors, (7803), 2787 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-12 15:28:15,211 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-12 15:28:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:15,211 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-12 15:28:15,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-12 15:28:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:15,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:15,213 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:15,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:15,414 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:15,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:15,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1210449916, now seen corresponding path program 83 times [2021-06-12 15:28:15,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:15,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270117092] [2021-06-12 15:28:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:15,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:15,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270117092] [2021-06-12 15:28:15,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270117092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:15,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943677930] [2021-06-12 15:28:15,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:15,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:28:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:15,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943677930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:15,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:15,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:15,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988803835] [2021-06-12 15:28:15,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:15,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:15,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:15,676 INFO L87 Difference]: Start difference. First operand 2788 states and 7803 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:16,161 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-12 15:28:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:28:16,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:16,165 INFO L225 Difference]: With dead ends: 3716 [2021-06-12 15:28:16,165 INFO L226 Difference]: Without dead ends: 3446 [2021-06-12 15:28:16,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:28:16,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-12 15:28:16,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-12 15:28:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.8120195667365477) internal successors, (8048), 2862 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-12 15:28:16,197 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-12 15:28:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:16,197 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-12 15:28:16,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:16,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-12 15:28:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:16,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:16,199 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:16,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:16,405 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:16,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:16,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1152715786, now seen corresponding path program 84 times [2021-06-12 15:28:16,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:16,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906563469] [2021-06-12 15:28:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:16,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:16,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906563469] [2021-06-12 15:28:16,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906563469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:16,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361929186] [2021-06-12 15:28:16,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:16,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:28:16,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:16,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:16,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:16,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361929186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:16,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:16,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:16,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698618328] [2021-06-12 15:28:16,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:16,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:16,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:16,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:16,665 INFO L87 Difference]: Start difference. First operand 2863 states and 8048 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:17,060 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-12 15:28:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:17,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:17,065 INFO L225 Difference]: With dead ends: 4458 [2021-06-12 15:28:17,065 INFO L226 Difference]: Without dead ends: 4188 [2021-06-12 15:28:17,065 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 358.8ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:28:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-12 15:28:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-12 15:28:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.829388560157791) internal successors, (8607), 3042 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-12 15:28:17,100 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-12 15:28:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:17,100 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-12 15:28:17,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-12 15:28:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:17,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:17,103 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:17,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:17,303 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:17,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1175059036, now seen corresponding path program 85 times [2021-06-12 15:28:17,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:17,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024198110] [2021-06-12 15:28:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:17,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:17,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024198110] [2021-06-12 15:28:17,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024198110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:17,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669567930] [2021-06-12 15:28:17,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:17,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:17,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669567930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:17,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:17,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:17,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027678401] [2021-06-12 15:28:17,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:17,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:17,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:17,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:17,576 INFO L87 Difference]: Start difference. First operand 3043 states and 8607 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:18,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:18,073 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-12 15:28:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:18,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-12 15:28:18,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:18,077 INFO L225 Difference]: With dead ends: 3920 [2021-06-12 15:28:18,077 INFO L226 Difference]: Without dead ends: 3431 [2021-06-12 15:28:18,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:28:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-12 15:28:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-12 15:28:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-12 15:28:18,102 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-12 15:28:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:18,102 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-12 15:28:18,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-12 15:28:18,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:18,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:18,104 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:18,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:18,304 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:18,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:18,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2003017648, now seen corresponding path program 86 times [2021-06-12 15:28:18,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:18,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20548974] [2021-06-12 15:28:18,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:18,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:18,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20548974] [2021-06-12 15:28:18,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20548974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:18,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244120069] [2021-06-12 15:28:18,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:18,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:18,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:18,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:18,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:18,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244120069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:18,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:18,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:18,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60645668] [2021-06-12 15:28:18,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:18,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:18,645 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:18,962 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-12 15:28:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:28:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:18,965 INFO L225 Difference]: With dead ends: 3024 [2021-06-12 15:28:18,965 INFO L226 Difference]: Without dead ends: 2690 [2021-06-12 15:28:18,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:28:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-12 15:28:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-12 15:28:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.7082152974504248) internal successors, (5736), 2118 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-12 15:28:18,986 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-12 15:28:18,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:18,987 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-12 15:28:18,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:18,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-12 15:28:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:18,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:18,988 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:19,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:19,189 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:19,189 INFO L82 PathProgramCache]: Analyzing trace with hash 381501940, now seen corresponding path program 87 times [2021-06-12 15:28:19,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:19,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852788465] [2021-06-12 15:28:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:19,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:19,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852788465] [2021-06-12 15:28:19,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852788465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:19,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058317184] [2021-06-12 15:28:19,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:19,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:28:19,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:19,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:19,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:19,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058317184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:19,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:19,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:19,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700210099] [2021-06-12 15:28:19,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:19,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:19,495 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:19,746 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-12 15:28:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:28:19,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:19,750 INFO L225 Difference]: With dead ends: 3646 [2021-06-12 15:28:19,750 INFO L226 Difference]: Without dead ends: 3376 [2021-06-12 15:28:19,750 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 268.7ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:28:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-12 15:28:19,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-12 15:28:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.720159151193634) internal successors, (6153), 2262 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-12 15:28:19,773 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-12 15:28:19,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:19,773 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-12 15:28:19,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-12 15:28:19,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:19,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:19,775 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:19,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:19,979 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:19,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1021160164, now seen corresponding path program 88 times [2021-06-12 15:28:19,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:19,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019565756] [2021-06-12 15:28:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:20,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:20,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019565756] [2021-06-12 15:28:20,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019565756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:20,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346295570] [2021-06-12 15:28:20,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:20,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:20,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:20,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:20,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:20,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346295570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:20,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:20,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:20,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926035387] [2021-06-12 15:28:20,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:20,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:20,327 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:20,632 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-12 15:28:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:28:20,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:20,636 INFO L225 Difference]: With dead ends: 3606 [2021-06-12 15:28:20,636 INFO L226 Difference]: Without dead ends: 3336 [2021-06-12 15:28:20,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:28:20,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-12 15:28:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-12 15:28:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.729139922978177) internal successors, (6378), 2337 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-12 15:28:20,662 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-12 15:28:20,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:20,662 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-12 15:28:20,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-12 15:28:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:20,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:20,663 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:20,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 15:28:20,877 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash 246241138, now seen corresponding path program 89 times [2021-06-12 15:28:20,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:20,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703110589] [2021-06-12 15:28:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:21,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:21,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703110589] [2021-06-12 15:28:21,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703110589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:21,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082715986] [2021-06-12 15:28:21,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:21,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:28:21,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:21,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:21,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:21,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082715986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:21,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:21,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:21,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254857398] [2021-06-12 15:28:21,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:21,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:21,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:21,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:21,190 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:21,459 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-12 15:28:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:28:21,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:21,462 INFO L225 Difference]: With dead ends: 3656 [2021-06-12 15:28:21,463 INFO L226 Difference]: Without dead ends: 3386 [2021-06-12 15:28:21,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:28:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-12 15:28:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-12 15:28:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.737562189054726) internal successors, (6603), 2412 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-12 15:28:21,489 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-12 15:28:21,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:21,490 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-12 15:28:21,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-12 15:28:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:21,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:21,491 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:21,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:21,692 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:21,692 INFO L82 PathProgramCache]: Analyzing trace with hash -207672222, now seen corresponding path program 90 times [2021-06-12 15:28:21,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:21,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403269269] [2021-06-12 15:28:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:21,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:21,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403269269] [2021-06-12 15:28:21,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403269269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:21,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659326749] [2021-06-12 15:28:21,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:21,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:28:21,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:21,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:21,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:22,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659326749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:22,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:22,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:22,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571726069] [2021-06-12 15:28:22,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:22,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:22,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:22,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:22,045 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:22,397 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-12 15:28:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:22,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:22,401 INFO L225 Difference]: With dead ends: 3681 [2021-06-12 15:28:22,401 INFO L226 Difference]: Without dead ends: 3411 [2021-06-12 15:28:22,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:28:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-12 15:28:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-12 15:28:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7454764776839564) internal successors, (6828), 2487 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-12 15:28:22,425 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-12 15:28:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:22,425 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-12 15:28:22,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-12 15:28:22,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:22,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:22,427 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:22,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-12 15:28:22,627 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:22,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:22,627 INFO L82 PathProgramCache]: Analyzing trace with hash 670339696, now seen corresponding path program 91 times [2021-06-12 15:28:22,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:22,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982346095] [2021-06-12 15:28:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:22,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:22,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982346095] [2021-06-12 15:28:22,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982346095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:22,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385474591] [2021-06-12 15:28:22,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:22,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:22,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385474591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:22,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:22,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:22,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935374063] [2021-06-12 15:28:22,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:22,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:22,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:22,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:22,915 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:23,228 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-12 15:28:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:28:23,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:23,231 INFO L225 Difference]: With dead ends: 3706 [2021-06-12 15:28:23,231 INFO L226 Difference]: Without dead ends: 3436 [2021-06-12 15:28:23,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:28:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-12 15:28:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-12 15:28:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.752927400468384) internal successors, (7053), 2562 states have internal predecessors, (7053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-12 15:28:23,258 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-12 15:28:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:23,258 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-12 15:28:23,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-12 15:28:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:23,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:23,260 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:23,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:23,461 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:23,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:23,461 INFO L82 PathProgramCache]: Analyzing trace with hash -229715104, now seen corresponding path program 92 times [2021-06-12 15:28:23,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:23,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105545160] [2021-06-12 15:28:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:23,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:23,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105545160] [2021-06-12 15:28:23,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105545160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:23,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679215927] [2021-06-12 15:28:23,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:23,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:23,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:23,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:23,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:23,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679215927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:23,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:23,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:23,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825739394] [2021-06-12 15:28:23,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:23,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:23,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:23,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:23,760 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:24,210 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-12 15:28:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:24,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:24,214 INFO L225 Difference]: With dead ends: 3731 [2021-06-12 15:28:24,214 INFO L226 Difference]: Without dead ends: 3461 [2021-06-12 15:28:24,214 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:28:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-12 15:28:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-12 15:28:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.7599544937428897) internal successors, (7278), 2637 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:24,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-12 15:28:24,242 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-12 15:28:24,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:24,242 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-12 15:28:24,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:24,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-12 15:28:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:24,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:24,244 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:24,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 15:28:24,445 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:24,445 INFO L82 PathProgramCache]: Analyzing trace with hash -658779410, now seen corresponding path program 93 times [2021-06-12 15:28:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:24,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045988928] [2021-06-12 15:28:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:24,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:24,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045988928] [2021-06-12 15:28:24,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045988928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:24,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392914977] [2021-06-12 15:28:24,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:24,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:28:24,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:28:24,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:24,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392914977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:24,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:24,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:24,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653553683] [2021-06-12 15:28:24,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:24,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:24,737 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:25,077 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-12 15:28:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:28:25,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:25,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:25,081 INFO L225 Difference]: With dead ends: 3756 [2021-06-12 15:28:25,081 INFO L226 Difference]: Without dead ends: 3486 [2021-06-12 15:28:25,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:28:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-12 15:28:25,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-12 15:28:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7665929203539825) internal successors, (7503), 2712 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-12 15:28:25,112 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-12 15:28:25,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:25,112 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-12 15:28:25,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-12 15:28:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:25,114 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:25,114 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:25,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 15:28:25,314 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1344962594, now seen corresponding path program 94 times [2021-06-12 15:28:25,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:25,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809111711] [2021-06-12 15:28:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:25,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:25,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809111711] [2021-06-12 15:28:25,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809111711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:25,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449615280] [2021-06-12 15:28:25,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:25,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:25,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:25,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:25,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449615280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:25,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:25,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:25,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702834474] [2021-06-12 15:28:25,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:25,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:25,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:25,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:25,616 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:26,068 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-12 15:28:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:26,072 INFO L225 Difference]: With dead ends: 3781 [2021-06-12 15:28:26,072 INFO L226 Difference]: Without dead ends: 3511 [2021-06-12 15:28:26,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-12 15:28:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-12 15:28:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.772874058127018) internal successors, (7728), 2787 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-12 15:28:26,113 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-12 15:28:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:26,113 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-12 15:28:26,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-12 15:28:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:26,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:26,116 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:26,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 15:28:26,316 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1429997332, now seen corresponding path program 95 times [2021-06-12 15:28:26,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:26,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974731202] [2021-06-12 15:28:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:26,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:26,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974731202] [2021-06-12 15:28:26,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974731202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:26,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200747078] [2021-06-12 15:28:26,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:26,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:28:26,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:26,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:26,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200747078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:26,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:26,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:26,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557512837] [2021-06-12 15:28:26,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:26,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:26,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:26,590 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:26,958 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-12 15:28:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:26,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:26,962 INFO L225 Difference]: With dead ends: 3806 [2021-06-12 15:28:26,962 INFO L226 Difference]: Without dead ends: 3536 [2021-06-12 15:28:26,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:28:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-12 15:28:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-12 15:28:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7788259958071277) internal successors, (7953), 2862 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-12 15:28:26,990 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-12 15:28:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:26,991 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-12 15:28:26,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-12 15:28:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:26,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:26,993 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:27,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:27,193 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1498148388, now seen corresponding path program 96 times [2021-06-12 15:28:27,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:27,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180708804] [2021-06-12 15:28:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:27,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:27,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180708804] [2021-06-12 15:28:27,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180708804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:27,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27820998] [2021-06-12 15:28:27,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:27,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:28:27,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:27,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:27,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:27,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27820998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:27,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:27,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:27,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020093345] [2021-06-12 15:28:27,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:27,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:27,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:27,501 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:28,000 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-12 15:28:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:28,004 INFO L225 Difference]: With dead ends: 3831 [2021-06-12 15:28:28,004 INFO L226 Difference]: Without dead ends: 3561 [2021-06-12 15:28:28,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-12 15:28:28,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-12 15:28:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7844739530132787) internal successors, (8178), 2937 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-12 15:28:28,038 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-12 15:28:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:28,038 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-12 15:28:28,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-12 15:28:28,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:28,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:28,041 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:28,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 15:28:28,241 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:28,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1499849834, now seen corresponding path program 97 times [2021-06-12 15:28:28,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:28,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029682255] [2021-06-12 15:28:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:28,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:28,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029682255] [2021-06-12 15:28:28,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029682255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:28,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473786575] [2021-06-12 15:28:28,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:28,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:28,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:28,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473786575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:28,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:28,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:28,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025039351] [2021-06-12 15:28:28,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:28,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:28,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:28,513 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:28,957 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-12 15:28:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:28,960 INFO L225 Difference]: With dead ends: 3856 [2021-06-12 15:28:28,960 INFO L226 Difference]: Without dead ends: 3586 [2021-06-12 15:28:28,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-12 15:28:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-12 15:28:29,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.789840637450199) internal successors, (8403), 3012 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-12 15:28:29,016 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-12 15:28:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:29,016 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-12 15:28:29,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-12 15:28:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:29,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:29,021 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:29,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:29,238 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:29,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:29,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1929603418, now seen corresponding path program 98 times [2021-06-12 15:28:29,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:29,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686237946] [2021-06-12 15:28:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:29,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:29,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686237946] [2021-06-12 15:28:29,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686237946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:29,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643784729] [2021-06-12 15:28:29,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:29,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:29,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:29,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:29,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:29,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643784729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:29,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:29,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:29,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055830838] [2021-06-12 15:28:29,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:29,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:29,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:29,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:29,563 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:30,164 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-12 15:28:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:28:30,164 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:30,168 INFO L225 Difference]: With dead ends: 3941 [2021-06-12 15:28:30,168 INFO L226 Difference]: Without dead ends: 3671 [2021-06-12 15:28:30,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 538.9ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:28:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-12 15:28:30,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-12 15:28:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.801425332037577) internal successors, (8648), 3087 states have internal predecessors, (8648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-12 15:28:30,204 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-12 15:28:30,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:30,204 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-12 15:28:30,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:30,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-12 15:28:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:30,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:30,206 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:30,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 15:28:30,407 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:30,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1871869288, now seen corresponding path program 99 times [2021-06-12 15:28:30,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:30,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553344721] [2021-06-12 15:28:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:30,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:30,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553344721] [2021-06-12 15:28:30,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553344721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:30,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039083910] [2021-06-12 15:28:30,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:30,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:28:30,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:30,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039083910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:30,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:30,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:30,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411056154] [2021-06-12 15:28:30,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:30,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:30,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:30,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:30,725 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:31,173 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-12 15:28:31,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:31,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:31,178 INFO L225 Difference]: With dead ends: 4708 [2021-06-12 15:28:31,178 INFO L226 Difference]: Without dead ends: 4438 [2021-06-12 15:28:31,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:31,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-12 15:28:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-12 15:28:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 2.8181818181818183) internal successors, (9207), 3267 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-12 15:28:31,223 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-12 15:28:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:31,223 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-12 15:28:31,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-12 15:28:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:31,226 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:31,226 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:31,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:31,443 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:31,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1894212538, now seen corresponding path program 100 times [2021-06-12 15:28:31,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:31,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816151936] [2021-06-12 15:28:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:31,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:31,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816151936] [2021-06-12 15:28:31,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816151936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:31,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201737341] [2021-06-12 15:28:31,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:31,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:31,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:31,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:31,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201737341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:31,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:31,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-12 15:28:31,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677023789] [2021-06-12 15:28:31,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:31,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:31,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:31,760 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:32,498 INFO L93 Difference]: Finished difference Result 4651 states and 12541 transitions. [2021-06-12 15:28:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:28:32,498 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:28:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:32,503 INFO L225 Difference]: With dead ends: 4651 [2021-06-12 15:28:32,503 INFO L226 Difference]: Without dead ends: 4076 [2021-06-12 15:28:32,503 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 664.5ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:28:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-12 15:28:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-12 15:28:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:32,541 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-06-12 15:28:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:32,541 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:32,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:32,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:32,544 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:32,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:32,757 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1987209659, now seen corresponding path program 101 times [2021-06-12 15:28:32,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:32,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018919209] [2021-06-12 15:28:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:33,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:33,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018919209] [2021-06-12 15:28:33,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018919209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:33,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806073151] [2021-06-12 15:28:33,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:33,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:28:33,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:33,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:33,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806073151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:33,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:33,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:33,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856938982] [2021-06-12 15:28:33,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:33,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:33,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:33,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:33,204 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:33,498 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-12 15:28:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:28:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:33,503 INFO L225 Difference]: With dead ends: 4346 [2021-06-12 15:28:33,503 INFO L226 Difference]: Without dead ends: 4076 [2021-06-12 15:28:33,504 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 403.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:28:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-12 15:28:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-12 15:28:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:33,543 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:33,543 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:33,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:33,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:33,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:33,546 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:33,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-12 15:28:33,763 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:33,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:33,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1347551435, now seen corresponding path program 102 times [2021-06-12 15:28:33,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:33,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673191148] [2021-06-12 15:28:33,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:33,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:33,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673191148] [2021-06-12 15:28:33,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673191148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:33,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944742844] [2021-06-12 15:28:33,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:34,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:28:34,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:34,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:34,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:34,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944742844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:34,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:34,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:34,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638545153] [2021-06-12 15:28:34,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:34,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:34,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:34,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:34,196 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:34,528 INFO L93 Difference]: Finished difference Result 4641 states and 12087 transitions. [2021-06-12 15:28:34,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:34,528 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:34,533 INFO L225 Difference]: With dead ends: 4641 [2021-06-12 15:28:34,533 INFO L226 Difference]: Without dead ends: 4371 [2021-06-12 15:28:34,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 422.9ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:28:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-06-12 15:28:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-06-12 15:28:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:34,571 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:34,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:34,571 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:34,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:34,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:34,573 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:34,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:34,774 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:34,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2122470461, now seen corresponding path program 103 times [2021-06-12 15:28:34,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:34,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194138141] [2021-06-12 15:28:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:34,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194138141] [2021-06-12 15:28:34,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194138141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248698452] [2021-06-12 15:28:34,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:34,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:34,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:35,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248698452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:35,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:35,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:35,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799104877] [2021-06-12 15:28:35,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:35,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:35,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:35,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:35,093 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:35,456 INFO L93 Difference]: Finished difference Result 4596 states and 11997 transitions. [2021-06-12 15:28:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:28:35,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:35,461 INFO L225 Difference]: With dead ends: 4596 [2021-06-12 15:28:35,461 INFO L226 Difference]: Without dead ends: 4326 [2021-06-12 15:28:35,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:28:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-12 15:28:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-06-12 15:28:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:35,509 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:35,510 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:35,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:35,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:35,512 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:35,513 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:35,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:35,714 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:35,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1718583475, now seen corresponding path program 104 times [2021-06-12 15:28:35,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:35,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815080200] [2021-06-12 15:28:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:35,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:35,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815080200] [2021-06-12 15:28:35,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815080200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:35,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832685440] [2021-06-12 15:28:35,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:35,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:35,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:35,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:35,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:36,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832685440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:36,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:36,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:36,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213497087] [2021-06-12 15:28:36,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:36,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:36,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:36,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:36,086 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:36,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:36,484 INFO L93 Difference]: Finished difference Result 4546 states and 11897 transitions. [2021-06-12 15:28:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:36,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:36,488 INFO L225 Difference]: With dead ends: 4546 [2021-06-12 15:28:36,488 INFO L226 Difference]: Without dead ends: 4276 [2021-06-12 15:28:36,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 418.0ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-12 15:28:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-06-12 15:28:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:36,521 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:36,522 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:36,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:36,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:36,524 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:36,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 15:28:36,725 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:36,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1698371903, now seen corresponding path program 105 times [2021-06-12 15:28:36,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:36,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489445093] [2021-06-12 15:28:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:36,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:36,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489445093] [2021-06-12 15:28:36,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489445093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:36,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908306322] [2021-06-12 15:28:36,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:36,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:28:36,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:28:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:37,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908306322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:37,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:37,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:37,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652381904] [2021-06-12 15:28:37,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:37,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:37,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:37,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:37,054 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:37,423 INFO L93 Difference]: Finished difference Result 4496 states and 11797 transitions. [2021-06-12 15:28:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:37,424 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:37,428 INFO L225 Difference]: With dead ends: 4496 [2021-06-12 15:28:37,428 INFO L226 Difference]: Without dead ends: 4226 [2021-06-12 15:28:37,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-12 15:28:37,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-06-12 15:28:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:37,463 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:37,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:37,463 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:37,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:37,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:37,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:37,465 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:37,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 15:28:37,666 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1696540593, now seen corresponding path program 106 times [2021-06-12 15:28:37,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:37,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988315324] [2021-06-12 15:28:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:37,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:37,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988315324] [2021-06-12 15:28:37,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988315324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:37,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086576520] [2021-06-12 15:28:37,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:37,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:37,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086576520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:37,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:37,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:37,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947023586] [2021-06-12 15:28:37,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:37,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:37,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:37,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:37,995 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:38,455 INFO L93 Difference]: Finished difference Result 4446 states and 11697 transitions. [2021-06-12 15:28:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:38,455 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:38,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:38,459 INFO L225 Difference]: With dead ends: 4446 [2021-06-12 15:28:38,459 INFO L226 Difference]: Without dead ends: 4176 [2021-06-12 15:28:38,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-12 15:28:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-06-12 15:28:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:38,499 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:38,499 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:38,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:38,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:38,502 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:38,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 15:28:38,709 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1267476287, now seen corresponding path program 107 times [2021-06-12 15:28:38,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:38,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893076586] [2021-06-12 15:28:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:38,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:38,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893076586] [2021-06-12 15:28:38,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893076586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:38,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811610892] [2021-06-12 15:28:38,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:38,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:28:38,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:38,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:38,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:39,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811610892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:39,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:39,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:39,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404574856] [2021-06-12 15:28:39,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:39,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:39,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:39,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:39,058 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:39,448 INFO L93 Difference]: Finished difference Result 4396 states and 11597 transitions. [2021-06-12 15:28:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:39,448 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:39,453 INFO L225 Difference]: With dead ends: 4396 [2021-06-12 15:28:39,453 INFO L226 Difference]: Without dead ends: 4126 [2021-06-12 15:28:39,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-12 15:28:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-06-12 15:28:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:39,490 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:39,491 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:39,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:39,493 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:39,493 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:39,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:39,694 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:39,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:39,694 INFO L82 PathProgramCache]: Analyzing trace with hash 581293103, now seen corresponding path program 108 times [2021-06-12 15:28:39,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:39,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089803247] [2021-06-12 15:28:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:39,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:39,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089803247] [2021-06-12 15:28:39,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089803247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:39,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848958769] [2021-06-12 15:28:39,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:39,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:28:39,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:40,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848958769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:40,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:40,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:40,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917717580] [2021-06-12 15:28:40,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:40,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:40,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:40,027 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:40,528 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-12 15:28:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:28:40,528 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:40,532 INFO L225 Difference]: With dead ends: 4346 [2021-06-12 15:28:40,532 INFO L226 Difference]: Without dead ends: 4076 [2021-06-12 15:28:40,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 475.4ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:28:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-12 15:28:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-12 15:28:40,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:40,567 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:40,567 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:40,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:40,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:40,569 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:40,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 15:28:40,769 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:40,770 INFO L82 PathProgramCache]: Analyzing trace with hash 496258365, now seen corresponding path program 109 times [2021-06-12 15:28:40,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:40,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788778790] [2021-06-12 15:28:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:40,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:40,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788778790] [2021-06-12 15:28:40,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788778790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:40,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878664277] [2021-06-12 15:28:40,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:40,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:40,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:41,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878664277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:41,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:41,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:41,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403432784] [2021-06-12 15:28:41,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:41,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:41,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:41,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:41,062 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:41,493 INFO L93 Difference]: Finished difference Result 4296 states and 11397 transitions. [2021-06-12 15:28:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:41,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:41,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:41,497 INFO L225 Difference]: With dead ends: 4296 [2021-06-12 15:28:41,497 INFO L226 Difference]: Without dead ends: 4026 [2021-06-12 15:28:41,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:28:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-12 15:28:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-12 15:28:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:41,533 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:41,533 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:41,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:41,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:41,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:41,535 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:41,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 15:28:41,736 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:41,736 INFO L82 PathProgramCache]: Analyzing trace with hash 428107309, now seen corresponding path program 110 times [2021-06-12 15:28:41,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:41,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52788127] [2021-06-12 15:28:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:41,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52788127] [2021-06-12 15:28:41,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52788127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692372594] [2021-06-12 15:28:41,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:41,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:41,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:41,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:41,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:42,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692372594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:42,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:42,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:42,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460940275] [2021-06-12 15:28:42,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:42,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:42,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:42,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:42,073 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:42,605 INFO L93 Difference]: Finished difference Result 4246 states and 11297 transitions. [2021-06-12 15:28:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:28:42,606 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:42,610 INFO L225 Difference]: With dead ends: 4246 [2021-06-12 15:28:42,610 INFO L226 Difference]: Without dead ends: 3976 [2021-06-12 15:28:42,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 504.2ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:28:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-12 15:28:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-06-12 15:28:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:42,646 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:42,646 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:42,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:42,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:42,648 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:42,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 15:28:42,849 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash -868861765, now seen corresponding path program 111 times [2021-06-12 15:28:42,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:42,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63010675] [2021-06-12 15:28:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:42,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:42,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63010675] [2021-06-12 15:28:42,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63010675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:42,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667723923] [2021-06-12 15:28:42,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:43,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:28:43,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:43,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:43,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667723923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:43,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:43,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:43,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639530278] [2021-06-12 15:28:43,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:43,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:43,147 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:43,603 INFO L93 Difference]: Finished difference Result 4196 states and 11197 transitions. [2021-06-12 15:28:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:28:43,603 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:43,607 INFO L225 Difference]: With dead ends: 4196 [2021-06-12 15:28:43,607 INFO L226 Difference]: Without dead ends: 3926 [2021-06-12 15:28:43,608 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 422.4ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:28:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-12 15:28:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-06-12 15:28:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:43,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:43,657 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:43,657 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:43,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:43,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:43,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:43,659 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:43,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:43,860 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash -439108181, now seen corresponding path program 112 times [2021-06-12 15:28:43,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:43,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751517970] [2021-06-12 15:28:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:44,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:44,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751517970] [2021-06-12 15:28:44,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751517970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:44,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065543692] [2021-06-12 15:28:44,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:44,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:44,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:44,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:44,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065543692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:44,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:44,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:44,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836879545] [2021-06-12 15:28:44,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:44,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:44,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:44,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:44,190 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:44,758 INFO L93 Difference]: Finished difference Result 4206 states and 11247 transitions. [2021-06-12 15:28:44,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:28:44,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:44,762 INFO L225 Difference]: With dead ends: 4206 [2021-06-12 15:28:44,762 INFO L226 Difference]: Without dead ends: 3936 [2021-06-12 15:28:44,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 537.5ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:28:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-06-12 15:28:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-06-12 15:28:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.812840702604482) internal successors, (9288), 3302 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-06-12 15:28:44,792 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-06-12 15:28:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:44,792 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-06-12 15:28:44,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-06-12 15:28:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:44,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:44,795 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:45,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:45,009 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash -496842311, now seen corresponding path program 113 times [2021-06-12 15:28:45,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:45,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177956771] [2021-06-12 15:28:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:45,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:45,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177956771] [2021-06-12 15:28:45,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177956771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:45,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223849762] [2021-06-12 15:28:45,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:45,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:28:45,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:45,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:45,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223849762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:45,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:45,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:45,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575958407] [2021-06-12 15:28:45,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:45,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:45,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:45,303 INFO L87 Difference]: Start difference. First operand 3303 states and 9288 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:45,813 INFO L93 Difference]: Finished difference Result 4948 states and 13371 transitions. [2021-06-12 15:28:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:28:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:45,818 INFO L225 Difference]: With dead ends: 4948 [2021-06-12 15:28:45,818 INFO L226 Difference]: Without dead ends: 4678 [2021-06-12 15:28:45,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:28:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-12 15:28:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-06-12 15:28:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 2.827972429638139) internal successors, (9847), 3482 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-06-12 15:28:45,856 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-06-12 15:28:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:45,857 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-06-12 15:28:45,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-06-12 15:28:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:45,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:45,859 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:46,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:46,060 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:46,060 INFO L82 PathProgramCache]: Analyzing trace with hash -474499061, now seen corresponding path program 114 times [2021-06-12 15:28:46,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:46,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212698045] [2021-06-12 15:28:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:46,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:46,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212698045] [2021-06-12 15:28:46,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212698045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:46,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729083387] [2021-06-12 15:28:46,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:46,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:28:46,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:46,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729083387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:46,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:46,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:46,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492074702] [2021-06-12 15:28:46,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:46,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:46,372 INFO L87 Difference]: Start difference. First operand 3483 states and 9847 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:47,028 INFO L93 Difference]: Finished difference Result 4816 states and 13036 transitions. [2021-06-12 15:28:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:28:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-12 15:28:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:47,033 INFO L225 Difference]: With dead ends: 4816 [2021-06-12 15:28:47,033 INFO L226 Difference]: Without dead ends: 4241 [2021-06-12 15:28:47,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:28:47,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-06-12 15:28:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-06-12 15:28:47,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.7361170899698664) internal successors, (6356), 2323 states have internal predecessors, (6356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-06-12 15:28:47,080 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-06-12 15:28:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:47,080 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-06-12 15:28:47,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-06-12 15:28:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:47,082 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:47,082 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:47,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 15:28:47,282 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1552772481, now seen corresponding path program 115 times [2021-06-12 15:28:47,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:47,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152205593] [2021-06-12 15:28:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:47,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:47,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152205593] [2021-06-12 15:28:47,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152205593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:47,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502079358] [2021-06-12 15:28:47,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:47,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:28:47,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:47,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502079358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:47,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:47,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-12 15:28:47,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307183402] [2021-06-12 15:28:47,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:47,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:47,662 INFO L87 Difference]: Start difference. First operand 2324 states and 6356 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:48,035 INFO L93 Difference]: Finished difference Result 3364 states and 8756 transitions. [2021-06-12 15:28:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:48,036 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:48,038 INFO L225 Difference]: With dead ends: 3364 [2021-06-12 15:28:48,038 INFO L226 Difference]: Without dead ends: 3030 [2021-06-12 15:28:48,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:28:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-12 15:28:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-06-12 15:28:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.7101328903654487) internal successors, (6526), 2408 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-06-12 15:28:48,061 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-06-12 15:28:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:48,061 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-06-12 15:28:48,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-06-12 15:28:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:48,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:48,063 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:48,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-12 15:28:48,263 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash 642486821, now seen corresponding path program 116 times [2021-06-12 15:28:48,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:48,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801495042] [2021-06-12 15:28:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:48,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:48,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801495042] [2021-06-12 15:28:48,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801495042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:48,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536236408] [2021-06-12 15:28:48,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:48,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:48,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:48,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:48,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:48,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536236408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:48,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:48,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006285024] [2021-06-12 15:28:48,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:48,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:48,638 INFO L87 Difference]: Start difference. First operand 2409 states and 6526 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:48,957 INFO L93 Difference]: Finished difference Result 4086 states and 10137 transitions. [2021-06-12 15:28:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:28:48,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:48,961 INFO L225 Difference]: With dead ends: 4086 [2021-06-12 15:28:48,961 INFO L226 Difference]: Without dead ends: 3816 [2021-06-12 15:28:48,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 372.9ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:28:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-12 15:28:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-06-12 15:28:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.720611285266458) internal successors, (6943), 2552 states have internal predecessors, (6943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:48,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-06-12 15:28:48,989 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-06-12 15:28:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:48,989 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-06-12 15:28:48,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-06-12 15:28:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:48,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:48,991 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:49,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 15:28:49,191 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:49,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1552838891, now seen corresponding path program 117 times [2021-06-12 15:28:49,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:49,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761367354] [2021-06-12 15:28:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:49,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:49,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761367354] [2021-06-12 15:28:49,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761367354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:49,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499198042] [2021-06-12 15:28:49,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:49,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:28:49,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:49,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:49,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:49,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499198042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:49,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:49,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:49,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191337580] [2021-06-12 15:28:49,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:49,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:49,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:49,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:49,576 INFO L87 Difference]: Start difference. First operand 2553 states and 6943 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:49,939 INFO L93 Difference]: Finished difference Result 4046 states and 10132 transitions. [2021-06-12 15:28:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:49,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:49,943 INFO L225 Difference]: With dead ends: 4046 [2021-06-12 15:28:49,943 INFO L226 Difference]: Without dead ends: 3776 [2021-06-12 15:28:49,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:28:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-06-12 15:28:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-06-12 15:28:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 2627 states have (on average 2.7285877426722496) internal successors, (7168), 2627 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-06-12 15:28:49,973 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-06-12 15:28:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:49,973 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-06-12 15:28:49,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-06-12 15:28:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:49,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:49,975 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:50,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 15:28:50,176 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash -42638813, now seen corresponding path program 118 times [2021-06-12 15:28:50,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:50,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101129008] [2021-06-12 15:28:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:50,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101129008] [2021-06-12 15:28:50,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101129008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51201554] [2021-06-12 15:28:50,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:50,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:50,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51201554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:50,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:50,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:50,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704099616] [2021-06-12 15:28:50,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:50,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:50,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:50,525 INFO L87 Difference]: Start difference. First operand 2628 states and 7168 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:50,878 INFO L93 Difference]: Finished difference Result 4096 states and 10307 transitions. [2021-06-12 15:28:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:28:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:50,882 INFO L225 Difference]: With dead ends: 4096 [2021-06-12 15:28:50,882 INFO L226 Difference]: Without dead ends: 3826 [2021-06-12 15:28:50,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 357.4ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:28:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-12 15:28:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-06-12 15:28:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 2.736121391561806) internal successors, (7393), 2702 states have internal predecessors, (7393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-06-12 15:28:50,913 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-06-12 15:28:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:50,913 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-06-12 15:28:50,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-06-12 15:28:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:50,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:50,916 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:51,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 15:28:51,117 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash 597019411, now seen corresponding path program 119 times [2021-06-12 15:28:51,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:51,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745245608] [2021-06-12 15:28:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:51,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:51,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745245608] [2021-06-12 15:28:51,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745245608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:51,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500835391] [2021-06-12 15:28:51,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:51,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:28:51,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:51,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:51,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:51,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500835391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:51,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:51,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:51,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740057084] [2021-06-12 15:28:51,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:51,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:51,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:51,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:51,498 INFO L87 Difference]: Start difference. First operand 2703 states and 7393 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:51,934 INFO L93 Difference]: Finished difference Result 4121 states and 10432 transitions. [2021-06-12 15:28:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:51,934 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:51,938 INFO L225 Difference]: With dead ends: 4121 [2021-06-12 15:28:51,938 INFO L226 Difference]: Without dead ends: 3851 [2021-06-12 15:28:51,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:28:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-12 15:28:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-06-12 15:28:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 2.7432481094706516) internal successors, (7618), 2777 states have internal predecessors, (7618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-06-12 15:28:51,971 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-06-12 15:28:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:51,971 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-06-12 15:28:51,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-06-12 15:28:51,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:51,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:51,974 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:52,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:52,177 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash -177899615, now seen corresponding path program 120 times [2021-06-12 15:28:52,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:52,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230843367] [2021-06-12 15:28:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:52,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:52,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230843367] [2021-06-12 15:28:52,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230843367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:52,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735382246] [2021-06-12 15:28:52,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:52,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:28:52,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:52,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:52,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735382246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:52,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:52,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:52,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342249223] [2021-06-12 15:28:52,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:52,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:52,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:52,554 INFO L87 Difference]: Start difference. First operand 2778 states and 7618 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:52,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:52,927 INFO L93 Difference]: Finished difference Result 4146 states and 10557 transitions. [2021-06-12 15:28:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:28:52,928 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:52,931 INFO L225 Difference]: With dead ends: 4146 [2021-06-12 15:28:52,931 INFO L226 Difference]: Without dead ends: 3876 [2021-06-12 15:28:52,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 374.5ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:28:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-06-12 15:28:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-06-12 15:28:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 2.75) internal successors, (7843), 2852 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-06-12 15:28:52,961 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-06-12 15:28:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:52,961 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-06-12 15:28:52,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-06-12 15:28:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:52,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:52,963 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:53,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 15:28:53,164 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash -631812975, now seen corresponding path program 121 times [2021-06-12 15:28:53,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:53,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072682937] [2021-06-12 15:28:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:53,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:53,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072682937] [2021-06-12 15:28:53,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072682937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:53,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95205437] [2021-06-12 15:28:53,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:53,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:53,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95205437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:53,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:53,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:53,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039220410] [2021-06-12 15:28:53,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:53,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:53,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:53,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:53,516 INFO L87 Difference]: Start difference. First operand 2853 states and 7843 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:53,985 INFO L93 Difference]: Finished difference Result 4171 states and 10682 transitions. [2021-06-12 15:28:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:53,989 INFO L225 Difference]: With dead ends: 4171 [2021-06-12 15:28:53,989 INFO L226 Difference]: Without dead ends: 3901 [2021-06-12 15:28:53,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:28:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-06-12 15:28:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-06-12 15:28:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 2.756405876323881) internal successors, (8068), 2927 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-06-12 15:28:54,020 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-06-12 15:28:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:54,020 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-06-12 15:28:54,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-06-12 15:28:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:54,022 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:54,022 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:54,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 15:28:54,223 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:54,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:54,223 INFO L82 PathProgramCache]: Analyzing trace with hash 246198943, now seen corresponding path program 122 times [2021-06-12 15:28:54,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:54,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560013623] [2021-06-12 15:28:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:54,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:54,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560013623] [2021-06-12 15:28:54,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560013623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:54,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937218460] [2021-06-12 15:28:54,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:54,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:54,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:54,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:54,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:54,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937218460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:54,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:54,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:54,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040775904] [2021-06-12 15:28:54,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:54,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:54,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:54,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:54,558 INFO L87 Difference]: Start difference. First operand 2928 states and 8068 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:54,951 INFO L93 Difference]: Finished difference Result 4196 states and 10807 transitions. [2021-06-12 15:28:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:54,955 INFO L225 Difference]: With dead ends: 4196 [2021-06-12 15:28:54,955 INFO L226 Difference]: Without dead ends: 3926 [2021-06-12 15:28:54,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:28:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-12 15:28:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-06-12 15:28:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.762491672218521) internal successors, (8293), 3002 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-06-12 15:28:54,990 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-06-12 15:28:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:54,991 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-06-12 15:28:54,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-06-12 15:28:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:54,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:54,993 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:55,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:55,196 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:55,197 INFO L82 PathProgramCache]: Analyzing trace with hash -653855857, now seen corresponding path program 123 times [2021-06-12 15:28:55,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:55,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034545697] [2021-06-12 15:28:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:55,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:55,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034545697] [2021-06-12 15:28:55,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034545697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:55,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833501000] [2021-06-12 15:28:55,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:55,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:28:55,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:55,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:28:55,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:55,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833501000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:55,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:55,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:55,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122879636] [2021-06-12 15:28:55,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:55,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:55,544 INFO L87 Difference]: Start difference. First operand 3003 states and 8293 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:56,021 INFO L93 Difference]: Finished difference Result 4221 states and 10932 transitions. [2021-06-12 15:28:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:56,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:56,025 INFO L225 Difference]: With dead ends: 4221 [2021-06-12 15:28:56,025 INFO L226 Difference]: Without dead ends: 3951 [2021-06-12 15:28:56,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:28:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-06-12 15:28:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-06-12 15:28:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3078 states, 3077 states have (on average 2.7682807929801756) internal successors, (8518), 3077 states have internal predecessors, (8518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-06-12 15:28:56,060 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-06-12 15:28:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:56,061 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-06-12 15:28:56,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-06-12 15:28:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:56,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:56,063 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:56,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:56,263 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1082920163, now seen corresponding path program 124 times [2021-06-12 15:28:56,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:56,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78834320] [2021-06-12 15:28:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:56,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:56,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78834320] [2021-06-12 15:28:56,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78834320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:56,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238410102] [2021-06-12 15:28:56,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:56,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:56,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:56,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:56,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238410102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:56,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:56,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:56,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427357784] [2021-06-12 15:28:56,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:56,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:56,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:56,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:56,582 INFO L87 Difference]: Start difference. First operand 3078 states and 8518 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:56,999 INFO L93 Difference]: Finished difference Result 4246 states and 11057 transitions. [2021-06-12 15:28:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:57,003 INFO L225 Difference]: With dead ends: 4246 [2021-06-12 15:28:57,003 INFO L226 Difference]: Without dead ends: 3976 [2021-06-12 15:28:57,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 416.0ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:28:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-12 15:28:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-06-12 15:28:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7737944162436547) internal successors, (8743), 3152 states have internal predecessors, (8743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-06-12 15:28:57,040 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-06-12 15:28:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:57,040 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-06-12 15:28:57,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-06-12 15:28:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:57,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:57,043 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:57,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:57,243 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1769103347, now seen corresponding path program 125 times [2021-06-12 15:28:57,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:57,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361218279] [2021-06-12 15:28:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:57,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:57,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361218279] [2021-06-12 15:28:57,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361218279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:57,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083297138] [2021-06-12 15:28:57,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:57,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:28:57,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:57,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:57,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:57,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083297138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:57,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:57,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:57,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5142641] [2021-06-12 15:28:57,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:57,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:57,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:57,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:57,604 INFO L87 Difference]: Start difference. First operand 3153 states and 8743 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:58,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:58,215 INFO L93 Difference]: Finished difference Result 4271 states and 11182 transitions. [2021-06-12 15:28:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:28:58,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:58,219 INFO L225 Difference]: With dead ends: 4271 [2021-06-12 15:28:58,219 INFO L226 Difference]: Without dead ends: 4001 [2021-06-12 15:28:58,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 600.6ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:28:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-12 15:28:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-06-12 15:28:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.779051750852185) internal successors, (8968), 3227 states have internal predecessors, (8968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-06-12 15:28:58,257 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-06-12 15:28:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:58,257 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-06-12 15:28:58,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-06-12 15:28:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:58,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:58,260 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:58,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 15:28:58,460 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:58,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1854138085, now seen corresponding path program 126 times [2021-06-12 15:28:58,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:58,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583541786] [2021-06-12 15:28:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:58,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:58,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583541786] [2021-06-12 15:28:58,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583541786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:58,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875012270] [2021-06-12 15:28:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:58,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:28:58,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:58,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:58,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875012270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:58,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:58,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:58,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668167036] [2021-06-12 15:28:58,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:58,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:58,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:58,782 INFO L87 Difference]: Start difference. First operand 3228 states and 8968 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:59,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:59,283 INFO L93 Difference]: Finished difference Result 4296 states and 11307 transitions. [2021-06-12 15:28:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:28:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:59,287 INFO L225 Difference]: With dead ends: 4296 [2021-06-12 15:28:59,287 INFO L226 Difference]: Without dead ends: 4026 [2021-06-12 15:28:59,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 457.4ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:28:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-12 15:28:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-12 15:28:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.784070260448213) internal successors, (9193), 3302 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-06-12 15:28:59,325 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-06-12 15:28:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:59,325 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-06-12 15:28:59,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-06-12 15:28:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:59,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:59,327 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:28:59,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 15:28:59,528 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:59,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:59,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1922289141, now seen corresponding path program 127 times [2021-06-12 15:28:59,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:59,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358816828] [2021-06-12 15:28:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:59,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:59,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358816828] [2021-06-12 15:28:59,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358816828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:59,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026593487] [2021-06-12 15:28:59,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:59,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:59,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026593487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:59,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:59,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:59,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421437112] [2021-06-12 15:28:59,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:59,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:59,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:59,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:59,861 INFO L87 Difference]: Start difference. First operand 3303 states and 9193 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:00,453 INFO L93 Difference]: Finished difference Result 4321 states and 11432 transitions. [2021-06-12 15:29:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:29:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:29:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:00,458 INFO L225 Difference]: With dead ends: 4321 [2021-06-12 15:29:00,458 INFO L226 Difference]: Without dead ends: 4051 [2021-06-12 15:29:00,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 569.1ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:00,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-12 15:29:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-06-12 15:29:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.788865857269766) internal successors, (9418), 3377 states have internal predecessors, (9418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-06-12 15:29:00,498 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-06-12 15:29:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:00,499 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-06-12 15:29:00,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-06-12 15:29:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:29:00,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:00,501 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:00,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:00,702 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:00,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1075709081, now seen corresponding path program 128 times [2021-06-12 15:29:00,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:00,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333684813] [2021-06-12 15:29:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:00,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:00,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333684813] [2021-06-12 15:29:00,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333684813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:00,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950594790] [2021-06-12 15:29:00,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:00,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:00,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:00,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:29:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:01,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950594790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:01,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:01,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:29:01,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654694835] [2021-06-12 15:29:01,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:01,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:01,030 INFO L87 Difference]: Start difference. First operand 3378 states and 9418 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:01,517 INFO L93 Difference]: Finished difference Result 4391 states and 11677 transitions. [2021-06-12 15:29:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:29:01,518 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:29:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:01,522 INFO L225 Difference]: With dead ends: 4391 [2021-06-12 15:29:01,522 INFO L226 Difference]: Without dead ends: 4121 [2021-06-12 15:29:01,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:29:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-12 15:29:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-06-12 15:29:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.7977983777520277) internal successors, (9658), 3452 states have internal predecessors, (9658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-06-12 15:29:01,564 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-06-12 15:29:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:01,564 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-06-12 15:29:01,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-06-12 15:29:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:29:01,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:01,567 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:01,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 15:29:01,768 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1505462665, now seen corresponding path program 129 times [2021-06-12 15:29:01,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:01,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89738831] [2021-06-12 15:29:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:01,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:01,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89738831] [2021-06-12 15:29:01,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89738831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:01,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642393184] [2021-06-12 15:29:01,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:01,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:29:01,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:02,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642393184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:02,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:02,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:29:02,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457464714] [2021-06-12 15:29:02,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:02,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:02,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:02,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:02,101 INFO L87 Difference]: Start difference. First operand 3453 states and 9658 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:02,767 INFO L93 Difference]: Finished difference Result 4969 states and 13303 transitions. [2021-06-12 15:29:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:29:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:29:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:02,771 INFO L225 Difference]: With dead ends: 4969 [2021-06-12 15:29:02,771 INFO L226 Difference]: Without dead ends: 4346 [2021-06-12 15:29:02,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=737, Invalid=2455, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:29:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-06-12 15:29:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-06-12 15:29:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8035157357527645) internal successors, (9888), 3527 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-12 15:29:02,808 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-12 15:29:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:02,808 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-12 15:29:02,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-12 15:29:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:29:02,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:02,811 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:03,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-12 15:29:03,012 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1447728535, now seen corresponding path program 130 times [2021-06-12 15:29:03,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:03,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458084436] [2021-06-12 15:29:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:03,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:03,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458084436] [2021-06-12 15:29:03,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458084436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:03,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78814614] [2021-06-12 15:29:03,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:03,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:03,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:03,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:29:03,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:03,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78814614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:03,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:03,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:29:03,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237269473] [2021-06-12 15:29:03,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:03,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:03,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:03,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:03,316 INFO L87 Difference]: Start difference. First operand 3528 states and 9888 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:03,869 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-12 15:29:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:29:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:29:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:03,874 INFO L225 Difference]: With dead ends: 5198 [2021-06-12 15:29:03,874 INFO L226 Difference]: Without dead ends: 4928 [2021-06-12 15:29:03,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-12 15:29:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-12 15:29:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.8181818181818183) internal successors, (10447), 3707 states have internal predecessors, (10447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-12 15:29:03,917 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-12 15:29:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:03,917 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-12 15:29:03,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-12 15:29:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:29:03,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:03,920 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:04,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 15:29:04,121 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1470071785, now seen corresponding path program 131 times [2021-06-12 15:29:04,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:04,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209649807] [2021-06-12 15:29:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:04,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:04,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209649807] [2021-06-12 15:29:04,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209649807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:04,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735453329] [2021-06-12 15:29:04,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:04,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:29:04,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:04,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:29:04,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:04,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735453329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:04,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:04,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:29:04,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794812874] [2021-06-12 15:29:04,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:04,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:04,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:04,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:04,465 INFO L87 Difference]: Start difference. First operand 3708 states and 10447 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:05,196 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-12 15:29:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:29:05,196 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 15:29:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:05,201 INFO L225 Difference]: With dead ends: 5021 [2021-06-12 15:29:05,201 INFO L226 Difference]: Without dead ends: 4446 [2021-06-12 15:29:05,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 713.3ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:29:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-12 15:29:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-12 15:29:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.735588009223674) internal successors, (7118), 2602 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-12 15:29:05,234 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-12 15:29:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:05,234 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-12 15:29:05,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-12 15:29:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:05,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:05,236 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:05,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:05,436 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2082436406, now seen corresponding path program 132 times [2021-06-12 15:29:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:05,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27541083] [2021-06-12 15:29:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:05,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:05,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27541083] [2021-06-12 15:29:05,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27541083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:05,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734211751] [2021-06-12 15:29:05,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:05,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:29:05,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:05,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:05,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:05,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734211751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:05,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:05,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:05,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436642859] [2021-06-12 15:29:05,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:05,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:05,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:05,862 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:06,228 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-12 15:29:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:29:06,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:06,232 INFO L225 Difference]: With dead ends: 3821 [2021-06-12 15:29:06,232 INFO L226 Difference]: Without dead ends: 3551 [2021-06-12 15:29:06,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:29:06,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-12 15:29:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-12 15:29:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.742995890922675) internal successors, (7343), 2677 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-12 15:29:06,262 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-12 15:29:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:06,262 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-12 15:29:06,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-12 15:29:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:06,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:06,264 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:06,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:06,464 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:06,465 INFO L82 PathProgramCache]: Analyzing trace with hash -112889306, now seen corresponding path program 133 times [2021-06-12 15:29:06,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:06,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698198273] [2021-06-12 15:29:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:06,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:06,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698198273] [2021-06-12 15:29:06,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698198273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:06,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006649707] [2021-06-12 15:29:06,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:06,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:06,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006649707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:06,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:06,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-12 15:29:06,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758111395] [2021-06-12 15:29:06,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:06,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:06,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:06,870 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:07,272 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-12 15:29:07,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:29:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:07,276 INFO L225 Difference]: With dead ends: 4241 [2021-06-12 15:29:07,276 INFO L226 Difference]: Without dead ends: 3971 [2021-06-12 15:29:07,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:29:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-12 15:29:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-12 15:29:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.75) internal successors, (7568), 2752 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-12 15:29:07,311 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-12 15:29:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:07,311 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-12 15:29:07,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-12 15:29:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:07,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:07,314 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:07,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:07,514 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:07,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1397310772, now seen corresponding path program 134 times [2021-06-12 15:29:07,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:07,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324407908] [2021-06-12 15:29:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:07,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:07,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324407908] [2021-06-12 15:29:07,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324407908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:07,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966053240] [2021-06-12 15:29:07,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:07,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:07,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:07,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966053240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:07,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:07,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:07,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128294919] [2021-06-12 15:29:07,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:07,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:07,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:07,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:07,912 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:08,279 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-12 15:29:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:29:08,280 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:08,283 INFO L225 Difference]: With dead ends: 4271 [2021-06-12 15:29:08,284 INFO L226 Difference]: Without dead ends: 4001 [2021-06-12 15:29:08,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:29:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-12 15:29:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-12 15:29:08,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.75663247258578) internal successors, (7793), 2827 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-12 15:29:08,315 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-12 15:29:08,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:08,315 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-12 15:29:08,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:08,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-12 15:29:08,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:08,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:08,318 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:08,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-12 15:29:08,518 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:08,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:08,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2036968996, now seen corresponding path program 135 times [2021-06-12 15:29:08,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:08,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570280716] [2021-06-12 15:29:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:08,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:08,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570280716] [2021-06-12 15:29:08,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570280716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:08,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900632911] [2021-06-12 15:29:08,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:08,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:29:08,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:08,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:29:08,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:08,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900632911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:08,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:08,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-12 15:29:08,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913193618] [2021-06-12 15:29:08,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:08,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:08,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:08,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:08,902 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:09,346 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-12 15:29:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:29:09,347 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:09,350 INFO L225 Difference]: With dead ends: 4296 [2021-06-12 15:29:09,350 INFO L226 Difference]: Without dead ends: 4026 [2021-06-12 15:29:09,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 485.0ms TimeCoverageRelationStatistics Valid=577, Invalid=1873, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:29:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-12 15:29:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-12 15:29:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7629221226740177) internal successors, (8018), 2902 states have internal predecessors, (8018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-12 15:29:09,382 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-12 15:29:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:09,382 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-12 15:29:09,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-12 15:29:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:09,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:09,385 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:09,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:09,585 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1262049970, now seen corresponding path program 136 times [2021-06-12 15:29:09,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:09,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349567877] [2021-06-12 15:29:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:09,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:09,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349567877] [2021-06-12 15:29:09,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349567877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:09,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382644819] [2021-06-12 15:29:09,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:09,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:09,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:09,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:09,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382644819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:09,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:09,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:09,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078832942] [2021-06-12 15:29:09,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:09,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:09,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:09,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:09,943 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:10,349 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-12 15:29:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:29:10,349 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:10,353 INFO L225 Difference]: With dead ends: 4321 [2021-06-12 15:29:10,353 INFO L226 Difference]: Without dead ends: 4051 [2021-06-12 15:29:10,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=597, Invalid=1853, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:29:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-12 15:29:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-12 15:29:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7688948605979173) internal successors, (8243), 2977 states have internal predecessors, (8243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-12 15:29:10,389 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-12 15:29:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:10,390 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-12 15:29:10,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-12 15:29:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:10,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:10,392 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:10,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 15:29:10,592 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash 808136610, now seen corresponding path program 137 times [2021-06-12 15:29:10,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:10,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243748227] [2021-06-12 15:29:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:10,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:10,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243748227] [2021-06-12 15:29:10,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243748227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:10,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56163650] [2021-06-12 15:29:10,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:10,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:29:10,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:10,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56163650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:10,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:10,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-12 15:29:10,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731123045] [2021-06-12 15:29:10,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:10,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:10,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:10,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:10,982 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:11,484 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-12 15:29:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:29:11,484 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:11,488 INFO L225 Difference]: With dead ends: 4346 [2021-06-12 15:29:11,488 INFO L226 Difference]: Without dead ends: 4076 [2021-06-12 15:29:11,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 516.9ms TimeCoverageRelationStatistics Valid=622, Invalid=2030, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:29:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-12 15:29:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-12 15:29:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.7745740498034075) internal successors, (8468), 3052 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-12 15:29:11,524 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-12 15:29:11,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:11,524 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-12 15:29:11,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:11,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-12 15:29:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:11,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:11,527 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:11,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:11,743 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:11,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:11,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1686148528, now seen corresponding path program 138 times [2021-06-12 15:29:11,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:11,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024007534] [2021-06-12 15:29:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:11,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024007534] [2021-06-12 15:29:11,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024007534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270014581] [2021-06-12 15:29:11,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:11,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:29:11,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:11,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:12,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270014581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:12,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:12,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:12,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240282034] [2021-06-12 15:29:12,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:12,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:12,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:12,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:12,096 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:12,537 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-12 15:29:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:29:12,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:12,541 INFO L225 Difference]: With dead ends: 4371 [2021-06-12 15:29:12,542 INFO L226 Difference]: Without dead ends: 4101 [2021-06-12 15:29:12,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 441.4ms TimeCoverageRelationStatistics Valid=650, Invalid=2002, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:29:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-12 15:29:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-12 15:29:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7799808122801406) internal successors, (8693), 3127 states have internal predecessors, (8693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-12 15:29:12,589 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-12 15:29:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:12,589 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-12 15:29:12,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-12 15:29:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:12,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:12,592 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:12,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 15:29:12,792 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:12,792 INFO L82 PathProgramCache]: Analyzing trace with hash 786093728, now seen corresponding path program 139 times [2021-06-12 15:29:12,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:12,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672005207] [2021-06-12 15:29:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:12,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:12,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672005207] [2021-06-12 15:29:12,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672005207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:12,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430936138] [2021-06-12 15:29:12,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:13,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:13,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430936138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:13,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:13,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-12 15:29:13,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34582472] [2021-06-12 15:29:13,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:13,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:13,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:13,152 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:13,712 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-12 15:29:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:29:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:13,716 INFO L225 Difference]: With dead ends: 4396 [2021-06-12 15:29:13,716 INFO L226 Difference]: Without dead ends: 4126 [2021-06-12 15:29:13,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 541.5ms TimeCoverageRelationStatistics Valid=677, Invalid=2185, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:29:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-12 15:29:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-12 15:29:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7851342910680823) internal successors, (8918), 3202 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-12 15:29:13,755 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-12 15:29:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:13,756 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-12 15:29:13,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-12 15:29:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:13,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:13,758 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:13,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 15:29:13,959 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:13,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:13,959 INFO L82 PathProgramCache]: Analyzing trace with hash 357029422, now seen corresponding path program 140 times [2021-06-12 15:29:13,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:13,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035658381] [2021-06-12 15:29:13,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:14,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:14,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035658381] [2021-06-12 15:29:14,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035658381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:14,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451325001] [2021-06-12 15:29:14,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:14,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:14,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:14,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:14,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451325001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:14,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:14,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:14,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827233031] [2021-06-12 15:29:14,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:14,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:14,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:14,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:14,302 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:14,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:14,797 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-12 15:29:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:29:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:14,801 INFO L225 Difference]: With dead ends: 4421 [2021-06-12 15:29:14,801 INFO L226 Difference]: Without dead ends: 4151 [2021-06-12 15:29:14,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=719, Invalid=2143, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:29:14,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-12 15:29:14,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-12 15:29:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.790051876716509) internal successors, (9143), 3277 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-12 15:29:14,841 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-12 15:29:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:14,841 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-12 15:29:14,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-12 15:29:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:14,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:14,843 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:15,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:15,044 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:15,044 INFO L82 PathProgramCache]: Analyzing trace with hash -329153762, now seen corresponding path program 141 times [2021-06-12 15:29:15,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:15,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729505611] [2021-06-12 15:29:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:15,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:15,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729505611] [2021-06-12 15:29:15,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729505611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:15,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436405148] [2021-06-12 15:29:15,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:15,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:29:15,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:15,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:29:15,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:15,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436405148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:15,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:15,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-12 15:29:15,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206881842] [2021-06-12 15:29:15,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:15,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:15,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:15,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:15,401 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:15,984 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-12 15:29:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:29:15,985 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:15,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:15,988 INFO L225 Difference]: With dead ends: 4446 [2021-06-12 15:29:15,988 INFO L226 Difference]: Without dead ends: 4176 [2021-06-12 15:29:15,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 560.5ms TimeCoverageRelationStatistics Valid=715, Invalid=2365, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:29:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-12 15:29:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-12 15:29:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7947494033412887) internal successors, (9368), 3352 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-12 15:29:16,033 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-12 15:29:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:16,033 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-12 15:29:16,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-12 15:29:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:16,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:16,035 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:16,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 15:29:16,237 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:16,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:16,237 INFO L82 PathProgramCache]: Analyzing trace with hash -414188500, now seen corresponding path program 142 times [2021-06-12 15:29:16,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:16,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102487543] [2021-06-12 15:29:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:16,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:16,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102487543] [2021-06-12 15:29:16,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102487543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:16,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411191574] [2021-06-12 15:29:16,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:16,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:16,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:16,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:16,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411191574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:16,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:16,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:16,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985125953] [2021-06-12 15:29:16,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:16,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:16,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:16,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:16,570 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:17,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:17,086 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-12 15:29:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:29:17,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:17,091 INFO L225 Difference]: With dead ends: 4471 [2021-06-12 15:29:17,091 INFO L226 Difference]: Without dead ends: 4201 [2021-06-12 15:29:17,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:29:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-12 15:29:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-12 15:29:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7992413189378467) internal successors, (9593), 3427 states have internal predecessors, (9593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-12 15:29:17,136 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-12 15:29:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:17,136 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-12 15:29:17,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-12 15:29:17,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:17,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:17,139 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:17,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:17,340 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:17,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:17,340 INFO L82 PathProgramCache]: Analyzing trace with hash -482339556, now seen corresponding path program 143 times [2021-06-12 15:29:17,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:17,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769457741] [2021-06-12 15:29:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:17,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:17,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769457741] [2021-06-12 15:29:17,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769457741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:17,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020743444] [2021-06-12 15:29:17,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:17,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:29:17,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:17,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020743444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:17,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:17,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-12 15:29:17,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206412901] [2021-06-12 15:29:17,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:17,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:17,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:17,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:17,707 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:18,323 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-12 15:29:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:29:18,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:18,328 INFO L225 Difference]: With dead ends: 4496 [2021-06-12 15:29:18,328 INFO L226 Difference]: Without dead ends: 4226 [2021-06-12 15:29:18,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=835, Invalid=2471, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:29:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-12 15:29:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-12 15:29:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.803540833809252) internal successors, (9818), 3502 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:18,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-12 15:29:18,373 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-12 15:29:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:18,373 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-12 15:29:18,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-12 15:29:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:18,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:18,376 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:18,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:18,577 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1779308630, now seen corresponding path program 144 times [2021-06-12 15:29:18,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:18,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543645024] [2021-06-12 15:29:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:18,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:18,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543645024] [2021-06-12 15:29:18,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543645024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:18,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636161144] [2021-06-12 15:29:18,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:18,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:29:18,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:18,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:18,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:18,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636161144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:18,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:18,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:18,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463209812] [2021-06-12 15:29:18,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:18,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:18,911 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:19,451 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-12 15:29:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:29:19,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:19,455 INFO L225 Difference]: With dead ends: 4566 [2021-06-12 15:29:19,455 INFO L226 Difference]: Without dead ends: 4296 [2021-06-12 15:29:19,455 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 515.6ms TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:29:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-12 15:29:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-12 15:29:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.8118535085266982) internal successors, (10058), 3577 states have internal predecessors, (10058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-12 15:29:19,496 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-12 15:29:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:19,496 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-12 15:29:19,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-12 15:29:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:19,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:19,499 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:19,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:19,705 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1349555046, now seen corresponding path program 145 times [2021-06-12 15:29:19,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:19,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060027320] [2021-06-12 15:29:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:19,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:19,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060027320] [2021-06-12 15:29:19,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060027320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:19,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886290253] [2021-06-12 15:29:19,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:19,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:19,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:20,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886290253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:20,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:20,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-12 15:29:20,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769973954] [2021-06-12 15:29:20,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:20,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:20,060 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:20,780 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-12 15:29:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:29:20,780 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:20,784 INFO L225 Difference]: With dead ends: 5144 [2021-06-12 15:29:20,785 INFO L226 Difference]: Without dead ends: 4521 [2021-06-12 15:29:20,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=961, Invalid=2821, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:29:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-12 15:29:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-12 15:29:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.8170865279299013) internal successors, (10288), 3652 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:20,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-12 15:29:20,821 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-12 15:29:20,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:20,821 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-12 15:29:20,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:20,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-12 15:29:20,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:20,824 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:20,824 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:21,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:21,037 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:21,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:21,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1407289176, now seen corresponding path program 146 times [2021-06-12 15:29:21,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:21,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825480940] [2021-06-12 15:29:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:21,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:21,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825480940] [2021-06-12 15:29:21,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825480940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:21,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127999301] [2021-06-12 15:29:21,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:21,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:21,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:21,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:21,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127999301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:21,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:21,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:21,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227321596] [2021-06-12 15:29:21,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:21,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:21,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:21,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:21,382 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:21,951 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-12 15:29:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:29:21,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:21,957 INFO L225 Difference]: With dead ends: 5348 [2021-06-12 15:29:21,957 INFO L226 Difference]: Without dead ends: 5078 [2021-06-12 15:29:21,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 529.3ms TimeCoverageRelationStatistics Valid=1023, Invalid=2517, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:29:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-12 15:29:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-12 15:29:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 2.8306367432150314) internal successors, (10847), 3832 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-12 15:29:21,999 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-12 15:29:21,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:21,999 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-12 15:29:21,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-12 15:29:22,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:22,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:22,002 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:22,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-12 15:29:22,202 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:22,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:22,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1384945926, now seen corresponding path program 147 times [2021-06-12 15:29:22,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:22,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299185990] [2021-06-12 15:29:22,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:22,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:22,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299185990] [2021-06-12 15:29:22,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299185990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:22,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516670105] [2021-06-12 15:29:22,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:22,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:29:22,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:22,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:22,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:22,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516670105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:22,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:22,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-12 15:29:22,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271399746] [2021-06-12 15:29:22,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:22,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:22,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:22,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:22,544 INFO L87 Difference]: Start difference. First operand 3833 states and 10847 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:23,294 INFO L93 Difference]: Finished difference Result 5216 states and 14136 transitions. [2021-06-12 15:29:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:29:23,294 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:29:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:23,299 INFO L225 Difference]: With dead ends: 5216 [2021-06-12 15:29:23,299 INFO L226 Difference]: Without dead ends: 4641 [2021-06-12 15:29:23,300 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 696.7ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:29:23,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-12 15:29:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2524. [2021-06-12 15:29:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 2.737217598097503) internal successors, (6906), 2523 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-06-12 15:29:23,332 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-06-12 15:29:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:23,333 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-06-12 15:29:23,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-06-12 15:29:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:23,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:23,335 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:23,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-12 15:29:23,535 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:23,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:23,535 INFO L82 PathProgramCache]: Analyzing trace with hash -736595598, now seen corresponding path program 148 times [2021-06-12 15:29:23,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:23,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991733850] [2021-06-12 15:29:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:23,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:23,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991733850] [2021-06-12 15:29:23,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991733850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:23,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257905835] [2021-06-12 15:29:23,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:23,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:23,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:23,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:23,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257905835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:23,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:23,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-12 15:29:23,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356227263] [2021-06-12 15:29:23,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:29:23,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:23,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:29:23,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:29:23,963 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:24,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:24,375 INFO L93 Difference]: Finished difference Result 3614 states and 9406 transitions. [2021-06-12 15:29:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:29:24,376 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:24,378 INFO L225 Difference]: With dead ends: 3614 [2021-06-12 15:29:24,378 INFO L226 Difference]: Without dead ends: 3280 [2021-06-12 15:29:24,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:29:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-12 15:29:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2609. [2021-06-12 15:29:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.71319018404908) internal successors, (7076), 2608 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7076 transitions. [2021-06-12 15:29:24,402 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7076 transitions. Word has length 120 [2021-06-12 15:29:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:24,402 INFO L482 AbstractCegarLoop]: Abstraction has 2609 states and 7076 transitions. [2021-06-12 15:29:24,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7076 transitions. [2021-06-12 15:29:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:24,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:24,404 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:24,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 15:29:24,604 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:24,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1812195050, now seen corresponding path program 149 times [2021-06-12 15:29:24,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:24,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111756501] [2021-06-12 15:29:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:24,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:24,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111756501] [2021-06-12 15:29:24,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111756501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:24,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053857808] [2021-06-12 15:29:24,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:24,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:29:24,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:24,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:24,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:24,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053857808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:24,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:24,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:29:24,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523204271] [2021-06-12 15:29:24,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:24,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:24,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:24,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:24,976 INFO L87 Difference]: Start difference. First operand 2609 states and 7076 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:25,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:25,299 INFO L93 Difference]: Finished difference Result 4436 states and 10987 transitions. [2021-06-12 15:29:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:29:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:25,303 INFO L225 Difference]: With dead ends: 4436 [2021-06-12 15:29:25,303 INFO L226 Difference]: Without dead ends: 4166 [2021-06-12 15:29:25,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:29:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-12 15:29:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 2753. [2021-06-12 15:29:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.722747093023256) internal successors, (7493), 2752 states have internal predecessors, (7493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7493 transitions. [2021-06-12 15:29:25,334 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7493 transitions. Word has length 120 [2021-06-12 15:29:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:25,335 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7493 transitions. [2021-06-12 15:29:25,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7493 transitions. [2021-06-12 15:29:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:25,336 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:25,336 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:25,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 15:29:25,537 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1564387846, now seen corresponding path program 150 times [2021-06-12 15:29:25,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:25,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532520067] [2021-06-12 15:29:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:25,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:25,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532520067] [2021-06-12 15:29:25,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532520067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:25,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152601747] [2021-06-12 15:29:25,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:25,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:29:25,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:25,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:26,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152601747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:26,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:26,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:26,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655854210] [2021-06-12 15:29:26,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:26,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:26,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:26,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:26,073 INFO L87 Difference]: Start difference. First operand 2753 states and 7493 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:26,465 INFO L93 Difference]: Finished difference Result 4396 states and 10982 transitions. [2021-06-12 15:29:26,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:29:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:26,469 INFO L225 Difference]: With dead ends: 4396 [2021-06-12 15:29:26,469 INFO L226 Difference]: Without dead ends: 4126 [2021-06-12 15:29:26,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:29:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-12 15:29:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2828. [2021-06-12 15:29:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.73010258224266) internal successors, (7718), 2827 states have internal predecessors, (7718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7718 transitions. [2021-06-12 15:29:26,498 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7718 transitions. Word has length 120 [2021-06-12 15:29:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:26,498 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7718 transitions. [2021-06-12 15:29:26,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7718 transitions. [2021-06-12 15:29:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:26,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:26,500 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:26,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 15:29:26,701 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:26,701 INFO L82 PathProgramCache]: Analyzing trace with hash -212302956, now seen corresponding path program 151 times [2021-06-12 15:29:26,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:26,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324435709] [2021-06-12 15:29:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:26,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:26,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324435709] [2021-06-12 15:29:26,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324435709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:26,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668578324] [2021-06-12 15:29:26,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:26,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:26,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:27,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668578324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:27,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:27,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:29:27,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772413393] [2021-06-12 15:29:27,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:27,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:27,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:27,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:27,067 INFO L87 Difference]: Start difference. First operand 2828 states and 7718 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:27,460 INFO L93 Difference]: Finished difference Result 4446 states and 11157 transitions. [2021-06-12 15:29:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:29:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:27,464 INFO L225 Difference]: With dead ends: 4446 [2021-06-12 15:29:27,464 INFO L226 Difference]: Without dead ends: 4176 [2021-06-12 15:29:27,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:29:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-12 15:29:27,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2903. [2021-06-12 15:29:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7370778773259823) internal successors, (7943), 2902 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 7943 transitions. [2021-06-12 15:29:27,493 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 7943 transitions. Word has length 120 [2021-06-12 15:29:27,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:27,493 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 7943 transitions. [2021-06-12 15:29:27,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 7943 transitions. [2021-06-12 15:29:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:27,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:27,496 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:27,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 15:29:27,696 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:27,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:27,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1887338628, now seen corresponding path program 152 times [2021-06-12 15:29:27,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:27,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651805827] [2021-06-12 15:29:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:27,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:27,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651805827] [2021-06-12 15:29:27,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651805827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:27,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414873846] [2021-06-12 15:29:27,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:27,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:27,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:27,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:28,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414873846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:28,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:28,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:28,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385997151] [2021-06-12 15:29:28,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:28,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:28,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:28,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:28,154 INFO L87 Difference]: Start difference. First operand 2903 states and 7943 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:28,617 INFO L93 Difference]: Finished difference Result 4471 states and 11282 transitions. [2021-06-12 15:29:28,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:29:28,618 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:28,622 INFO L225 Difference]: With dead ends: 4471 [2021-06-12 15:29:28,622 INFO L226 Difference]: Without dead ends: 4201 [2021-06-12 15:29:28,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 530.6ms TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:29:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-12 15:29:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2978. [2021-06-12 15:29:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7437017131340276) internal successors, (8168), 2977 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8168 transitions. [2021-06-12 15:29:28,660 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8168 transitions. Word has length 120 [2021-06-12 15:29:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:28,660 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8168 transitions. [2021-06-12 15:29:28,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8168 transitions. [2021-06-12 15:29:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:28,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:28,662 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:28,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:28,863 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:28,863 INFO L82 PathProgramCache]: Analyzing trace with hash -897428590, now seen corresponding path program 153 times [2021-06-12 15:29:28,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:28,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449149428] [2021-06-12 15:29:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:29,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:29,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449149428] [2021-06-12 15:29:29,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449149428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:29,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829237396] [2021-06-12 15:29:29,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:29,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:29:29,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:29,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:29:29,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:29,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829237396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:29,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:29,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:29:29,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342010935] [2021-06-12 15:29:29,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:29,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:29,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:29,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:29,223 INFO L87 Difference]: Start difference. First operand 2978 states and 8168 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:29,638 INFO L93 Difference]: Finished difference Result 4496 states and 11407 transitions. [2021-06-12 15:29:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:29:29,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:29,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:29,642 INFO L225 Difference]: With dead ends: 4496 [2021-06-12 15:29:29,642 INFO L226 Difference]: Without dead ends: 4226 [2021-06-12 15:29:29,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:29:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-12 15:29:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3053. [2021-06-12 15:29:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.75) internal successors, (8393), 3052 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:29,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8393 transitions. [2021-06-12 15:29:29,678 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8393 transitions. Word has length 120 [2021-06-12 15:29:29,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:29,678 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8393 transitions. [2021-06-12 15:29:29,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8393 transitions. [2021-06-12 15:29:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:29,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:29,682 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:29,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:29,899 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:29,899 INFO L82 PathProgramCache]: Analyzing trace with hash -257770366, now seen corresponding path program 154 times [2021-06-12 15:29:29,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:29,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552109293] [2021-06-12 15:29:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:30,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:30,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552109293] [2021-06-12 15:29:30,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552109293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:30,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505670423] [2021-06-12 15:29:30,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:30,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:30,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:30,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:30,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:30,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505670423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:30,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:30,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:30,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39996630] [2021-06-12 15:29:30,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:30,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:30,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:30,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:30,493 INFO L87 Difference]: Start difference. First operand 3053 states and 8393 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:31,000 INFO L93 Difference]: Finished difference Result 4521 states and 11532 transitions. [2021-06-12 15:29:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:29:31,000 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:31,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:31,005 INFO L225 Difference]: With dead ends: 4521 [2021-06-12 15:29:31,005 INFO L226 Difference]: Without dead ends: 4251 [2021-06-12 15:29:31,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 630.1ms TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:29:31,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-12 15:29:31,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3128. [2021-06-12 15:29:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7559961624560283) internal successors, (8618), 3127 states have internal predecessors, (8618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8618 transitions. [2021-06-12 15:29:31,041 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8618 transitions. Word has length 120 [2021-06-12 15:29:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:31,041 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8618 transitions. [2021-06-12 15:29:31,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8618 transitions. [2021-06-12 15:29:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:31,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:31,044 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:31,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:31,244 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:31,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1032689392, now seen corresponding path program 155 times [2021-06-12 15:29:31,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:31,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951156756] [2021-06-12 15:29:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:31,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:31,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951156756] [2021-06-12 15:29:31,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951156756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:31,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111599456] [2021-06-12 15:29:31,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:31,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:29:31,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:31,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:31,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111599456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:31,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:31,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:29:31,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388444154] [2021-06-12 15:29:31,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:31,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:31,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:31,623 INFO L87 Difference]: Start difference. First operand 3128 states and 8618 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:32,049 INFO L93 Difference]: Finished difference Result 4546 states and 11657 transitions. [2021-06-12 15:29:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:29:32,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:32,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:32,053 INFO L225 Difference]: With dead ends: 4546 [2021-06-12 15:29:32,053 INFO L226 Difference]: Without dead ends: 4276 [2021-06-12 15:29:32,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:29:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-12 15:29:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3203. [2021-06-12 15:29:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7617114303560273) internal successors, (8843), 3202 states have internal predecessors, (8843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8843 transitions. [2021-06-12 15:29:32,092 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8843 transitions. Word has length 120 [2021-06-12 15:29:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:32,092 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8843 transitions. [2021-06-12 15:29:32,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8843 transitions. [2021-06-12 15:29:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:32,095 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:32,095 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:32,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:32,295 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:32,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:32,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1486602752, now seen corresponding path program 156 times [2021-06-12 15:29:32,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:32,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611151105] [2021-06-12 15:29:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:32,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:32,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611151105] [2021-06-12 15:29:32,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611151105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:32,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720468151] [2021-06-12 15:29:32,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:32,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:29:32,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:32,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:32,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:32,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720468151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:32,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:32,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:32,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054822601] [2021-06-12 15:29:32,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:32,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:32,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:32,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:32,674 INFO L87 Difference]: Start difference. First operand 3203 states and 8843 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:33,240 INFO L93 Difference]: Finished difference Result 4571 states and 11782 transitions. [2021-06-12 15:29:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:29:33,240 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:33,244 INFO L225 Difference]: With dead ends: 4571 [2021-06-12 15:29:33,244 INFO L226 Difference]: Without dead ends: 4301 [2021-06-12 15:29:33,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 549.4ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:29:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-12 15:29:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3278. [2021-06-12 15:29:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.767165090021361) internal successors, (9068), 3277 states have internal predecessors, (9068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9068 transitions. [2021-06-12 15:29:33,279 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9068 transitions. Word has length 120 [2021-06-12 15:29:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:33,279 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9068 transitions. [2021-06-12 15:29:33,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9068 transitions. [2021-06-12 15:29:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:33,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:33,281 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:33,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:33,481 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:33,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:33,482 INFO L82 PathProgramCache]: Analyzing trace with hash -608590834, now seen corresponding path program 157 times [2021-06-12 15:29:33,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:33,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710579472] [2021-06-12 15:29:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:33,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:33,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710579472] [2021-06-12 15:29:33,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710579472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:33,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204068815] [2021-06-12 15:29:33,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:33,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:33,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204068815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:33,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:33,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:29:33,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852161530] [2021-06-12 15:29:33,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:33,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:33,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:33,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:33,825 INFO L87 Difference]: Start difference. First operand 3278 states and 9068 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:34,298 INFO L93 Difference]: Finished difference Result 4596 states and 11907 transitions. [2021-06-12 15:29:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:29:34,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:34,302 INFO L225 Difference]: With dead ends: 4596 [2021-06-12 15:29:34,302 INFO L226 Difference]: Without dead ends: 4326 [2021-06-12 15:29:34,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:29:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-12 15:29:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3353. [2021-06-12 15:29:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7723747016706444) internal successors, (9293), 3352 states have internal predecessors, (9293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:34,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9293 transitions. [2021-06-12 15:29:34,340 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9293 transitions. Word has length 120 [2021-06-12 15:29:34,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:34,340 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9293 transitions. [2021-06-12 15:29:34,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:34,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9293 transitions. [2021-06-12 15:29:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:34,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:34,343 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:34,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:34,543 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:34,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:34,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1508645634, now seen corresponding path program 158 times [2021-06-12 15:29:34,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:34,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699853347] [2021-06-12 15:29:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:34,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:34,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699853347] [2021-06-12 15:29:34,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699853347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:34,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443404341] [2021-06-12 15:29:34,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:34,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:34,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:34,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:34,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:34,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443404341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:34,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:34,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:34,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628654800] [2021-06-12 15:29:34,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:34,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:34,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:34,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:34,919 INFO L87 Difference]: Start difference. First operand 3353 states and 9293 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:35,538 INFO L93 Difference]: Finished difference Result 4621 states and 12032 transitions. [2021-06-12 15:29:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:29:35,538 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:35,542 INFO L225 Difference]: With dead ends: 4621 [2021-06-12 15:29:35,542 INFO L226 Difference]: Without dead ends: 4351 [2021-06-12 15:29:35,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 607.0ms TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:29:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-12 15:29:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3428. [2021-06-12 15:29:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7773562882988037) internal successors, (9518), 3427 states have internal predecessors, (9518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9518 transitions. [2021-06-12 15:29:35,582 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9518 transitions. Word has length 120 [2021-06-12 15:29:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:35,582 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9518 transitions. [2021-06-12 15:29:35,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9518 transitions. [2021-06-12 15:29:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:35,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:35,585 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:35,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:35,789 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:35,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1937709940, now seen corresponding path program 159 times [2021-06-12 15:29:35,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:35,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968596739] [2021-06-12 15:29:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:35,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:35,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968596739] [2021-06-12 15:29:35,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968596739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:35,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446681505] [2021-06-12 15:29:35,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:36,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:29:36,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:36,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:29:36,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:36,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446681505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:36,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:36,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:29:36,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468017725] [2021-06-12 15:29:36,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:36,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:36,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:36,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:36,141 INFO L87 Difference]: Start difference. First operand 3428 states and 9518 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:36,669 INFO L93 Difference]: Finished difference Result 4646 states and 12157 transitions. [2021-06-12 15:29:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:29:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:36,674 INFO L225 Difference]: With dead ends: 4646 [2021-06-12 15:29:36,674 INFO L226 Difference]: Without dead ends: 4376 [2021-06-12 15:29:36,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 501.2ms TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:29:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-12 15:29:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3503. [2021-06-12 15:29:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7821245002855512) internal successors, (9743), 3502 states have internal predecessors, (9743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9743 transitions. [2021-06-12 15:29:36,716 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9743 transitions. Word has length 120 [2021-06-12 15:29:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:36,717 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9743 transitions. [2021-06-12 15:29:36,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9743 transitions. [2021-06-12 15:29:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:36,720 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:36,720 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:36,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 15:29:36,929 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1671074172, now seen corresponding path program 160 times [2021-06-12 15:29:36,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:36,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278880775] [2021-06-12 15:29:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:37,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:37,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278880775] [2021-06-12 15:29:37,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278880775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:37,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673112612] [2021-06-12 15:29:37,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:37,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:37,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:37,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:37,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673112612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:37,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:37,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:37,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512036140] [2021-06-12 15:29:37,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:37,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:37,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:37,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:37,288 INFO L87 Difference]: Start difference. First operand 3503 states and 9743 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:37,996 INFO L93 Difference]: Finished difference Result 4671 states and 12282 transitions. [2021-06-12 15:29:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:29:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:38,000 INFO L225 Difference]: With dead ends: 4671 [2021-06-12 15:29:38,000 INFO L226 Difference]: Without dead ends: 4401 [2021-06-12 15:29:38,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 659.1ms TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:29:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-12 15:29:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3578. [2021-06-12 15:29:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.786692759295499) internal successors, (9968), 3577 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9968 transitions. [2021-06-12 15:29:38,038 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9968 transitions. Word has length 120 [2021-06-12 15:29:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:38,038 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9968 transitions. [2021-06-12 15:29:38,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9968 transitions. [2021-06-12 15:29:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:38,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:38,041 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:38,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-12 15:29:38,242 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:38,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1586039434, now seen corresponding path program 161 times [2021-06-12 15:29:38,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:38,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683118833] [2021-06-12 15:29:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:38,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:38,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683118833] [2021-06-12 15:29:38,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683118833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:38,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457316994] [2021-06-12 15:29:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:38,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:29:38,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:38,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:38,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:38,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457316994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:38,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:38,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:29:38,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656609887] [2021-06-12 15:29:38,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:38,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:38,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:38,575 INFO L87 Difference]: Start difference. First operand 3578 states and 9968 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:39,118 INFO L93 Difference]: Finished difference Result 4696 states and 12407 transitions. [2021-06-12 15:29:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:29:39,118 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:39,123 INFO L225 Difference]: With dead ends: 4696 [2021-06-12 15:29:39,123 INFO L226 Difference]: Without dead ends: 4426 [2021-06-12 15:29:39,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:29:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-12 15:29:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3653. [2021-06-12 15:29:39,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.7910733844468782) internal successors, (10193), 3652 states have internal predecessors, (10193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10193 transitions. [2021-06-12 15:29:39,168 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10193 transitions. Word has length 120 [2021-06-12 15:29:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:39,168 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10193 transitions. [2021-06-12 15:29:39,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10193 transitions. [2021-06-12 15:29:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:39,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:39,171 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:39,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 15:29:39,371 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:39,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1517888378, now seen corresponding path program 162 times [2021-06-12 15:29:39,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:39,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252899453] [2021-06-12 15:29:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:39,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:39,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252899453] [2021-06-12 15:29:39,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252899453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:39,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934742007] [2021-06-12 15:29:39,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:39,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:29:39,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:39,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:29:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934742007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:39,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:39,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:39,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308979814] [2021-06-12 15:29:39,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:39,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:39,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:39,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:39,747 INFO L87 Difference]: Start difference. First operand 3653 states and 10193 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:40,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:40,409 INFO L93 Difference]: Finished difference Result 4721 states and 12532 transitions. [2021-06-12 15:29:40,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:29:40,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:40,414 INFO L225 Difference]: With dead ends: 4721 [2021-06-12 15:29:40,415 INFO L226 Difference]: Without dead ends: 4451 [2021-06-12 15:29:40,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 615.4ms TimeCoverageRelationStatistics Valid=773, Invalid=2533, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:29:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-12 15:29:40,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3728. [2021-06-12 15:29:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.795277703246579) internal successors, (10418), 3727 states have internal predecessors, (10418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10418 transitions. [2021-06-12 15:29:40,463 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10418 transitions. Word has length 120 [2021-06-12 15:29:40,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:40,463 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10418 transitions. [2021-06-12 15:29:40,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:40,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10418 transitions. [2021-06-12 15:29:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:40,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:40,466 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:40,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:40,667 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:40,667 INFO L82 PathProgramCache]: Analyzing trace with hash 220919304, now seen corresponding path program 163 times [2021-06-12 15:29:40,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:40,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897068549] [2021-06-12 15:29:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:40,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:40,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897068549] [2021-06-12 15:29:40,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897068549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:40,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501594353] [2021-06-12 15:29:40,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:40,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501594353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:40,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:40,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:29:40,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409623617] [2021-06-12 15:29:40,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:40,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:40,996 INFO L87 Difference]: Start difference. First operand 3728 states and 10418 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:41,596 INFO L93 Difference]: Finished difference Result 4791 states and 12777 transitions. [2021-06-12 15:29:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:29:41,596 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:41,601 INFO L225 Difference]: With dead ends: 4791 [2021-06-12 15:29:41,601 INFO L226 Difference]: Without dead ends: 4521 [2021-06-12 15:29:41,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 548.2ms TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:29:41,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-12 15:29:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3803. [2021-06-12 15:29:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.8032614413466597) internal successors, (10658), 3802 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10658 transitions. [2021-06-12 15:29:41,650 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10658 transitions. Word has length 120 [2021-06-12 15:29:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:41,650 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10658 transitions. [2021-06-12 15:29:41,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10658 transitions. [2021-06-12 15:29:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:41,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:41,653 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:41,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 15:29:41,854 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:41,854 INFO L82 PathProgramCache]: Analyzing trace with hash 650672888, now seen corresponding path program 164 times [2021-06-12 15:29:41,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:41,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052356780] [2021-06-12 15:29:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:42,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:42,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052356780] [2021-06-12 15:29:42,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052356780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:42,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730023913] [2021-06-12 15:29:42,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:42,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:42,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:42,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:42,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:42,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730023913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:42,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:42,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:42,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470263829] [2021-06-12 15:29:42,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:42,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:42,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:42,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:42,197 INFO L87 Difference]: Start difference. First operand 3803 states and 10658 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:43,018 INFO L93 Difference]: Finished difference Result 5369 states and 14403 transitions. [2021-06-12 15:29:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:29:43,018 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:43,022 INFO L225 Difference]: With dead ends: 5369 [2021-06-12 15:29:43,023 INFO L226 Difference]: Without dead ends: 4746 [2021-06-12 15:29:43,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=1037, Invalid=2995, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:29:43,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-06-12 15:29:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3878. [2021-06-12 15:29:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8083569770441064) internal successors, (10888), 3877 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10888 transitions. [2021-06-12 15:29:43,061 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10888 transitions. Word has length 120 [2021-06-12 15:29:43,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:43,062 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10888 transitions. [2021-06-12 15:29:43,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:43,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10888 transitions. [2021-06-12 15:29:43,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:43,065 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:43,065 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:43,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:43,265 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:43,266 INFO L82 PathProgramCache]: Analyzing trace with hash 592938758, now seen corresponding path program 165 times [2021-06-12 15:29:43,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:43,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478562091] [2021-06-12 15:29:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:43,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:43,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478562091] [2021-06-12 15:29:43,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478562091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:43,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639663818] [2021-06-12 15:29:43,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:43,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:29:43,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:43,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:43,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:43,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639663818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:43,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:43,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:29:43,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353298647] [2021-06-12 15:29:43,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:43,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:43,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:43,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:43,600 INFO L87 Difference]: Start difference. First operand 3878 states and 10888 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:44,213 INFO L93 Difference]: Finished difference Result 5598 states and 15121 transitions. [2021-06-12 15:29:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:29:44,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:44,219 INFO L225 Difference]: With dead ends: 5598 [2021-06-12 15:29:44,219 INFO L226 Difference]: Without dead ends: 5328 [2021-06-12 15:29:44,219 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 563.2ms TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:29:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-12 15:29:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4058. [2021-06-12 15:29:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 4057 states have (on average 2.82154301207789) internal successors, (11447), 4057 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 11447 transitions. [2021-06-12 15:29:44,267 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 11447 transitions. Word has length 120 [2021-06-12 15:29:44,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:44,267 INFO L482 AbstractCegarLoop]: Abstraction has 4058 states and 11447 transitions. [2021-06-12 15:29:44,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:44,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 11447 transitions. [2021-06-12 15:29:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:44,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:44,270 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:44,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:44,471 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash 615282008, now seen corresponding path program 166 times [2021-06-12 15:29:44,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:44,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450775808] [2021-06-12 15:29:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:44,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:44,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450775808] [2021-06-12 15:29:44,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450775808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:44,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127327319] [2021-06-12 15:29:44,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:44,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:44,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:44,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:44,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:44,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127327319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:44,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:44,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:44,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920443388] [2021-06-12 15:29:44,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:44,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:44,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:44,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:44,843 INFO L87 Difference]: Start difference. First operand 4058 states and 11447 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:45,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:45,629 INFO L93 Difference]: Finished difference Result 5085 states and 13821 transitions. [2021-06-12 15:29:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:29:45,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:29:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:45,634 INFO L225 Difference]: With dead ends: 5085 [2021-06-12 15:29:45,634 INFO L226 Difference]: Without dead ends: 4506 [2021-06-12 15:29:45,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 757.8ms TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:29:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-12 15:29:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2713. [2021-06-12 15:29:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7389380530973453) internal successors, (7428), 2712 states have internal predecessors, (7428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7428 transitions. [2021-06-12 15:29:45,661 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7428 transitions. Word has length 120 [2021-06-12 15:29:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:45,662 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7428 transitions. [2021-06-12 15:29:45,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7428 transitions. [2021-06-12 15:29:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:45,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:45,663 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:45,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:45,864 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:45,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:45,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1413473561, now seen corresponding path program 167 times [2021-06-12 15:29:45,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:45,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179896298] [2021-06-12 15:29:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:46,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:46,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179896298] [2021-06-12 15:29:46,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179896298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:46,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837831191] [2021-06-12 15:29:46,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:46,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:29:46,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:46,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:46,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837831191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:46,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:46,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:46,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841566778] [2021-06-12 15:29:46,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:46,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:46,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:46,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:46,271 INFO L87 Difference]: Start difference. First operand 2713 states and 7428 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:46,640 INFO L93 Difference]: Finished difference Result 4031 states and 10267 transitions. [2021-06-12 15:29:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:29:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:46,644 INFO L225 Difference]: With dead ends: 4031 [2021-06-12 15:29:46,644 INFO L226 Difference]: Without dead ends: 3761 [2021-06-12 15:29:46,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 428.9ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:29:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-12 15:29:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2788. [2021-06-12 15:29:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.7459634015069967) internal successors, (7653), 2787 states have internal predecessors, (7653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7653 transitions. [2021-06-12 15:29:46,673 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7653 transitions. Word has length 125 [2021-06-12 15:29:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:46,673 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7653 transitions. [2021-06-12 15:29:46,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7653 transitions. [2021-06-12 15:29:46,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:46,675 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:46,675 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:46,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-12 15:29:46,876 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:46,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1963109335, now seen corresponding path program 168 times [2021-06-12 15:29:46,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:46,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085567764] [2021-06-12 15:29:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:47,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:47,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085567764] [2021-06-12 15:29:47,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085567764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:47,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662435531] [2021-06-12 15:29:47,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:47,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:29:47,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:47,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:47,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:47,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662435531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:47,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:47,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:47,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504682605] [2021-06-12 15:29:47,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:47,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:47,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:47,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:47,301 INFO L87 Difference]: Start difference. First operand 2788 states and 7653 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:47,735 INFO L93 Difference]: Finished difference Result 4501 states and 11282 transitions. [2021-06-12 15:29:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:29:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:47,739 INFO L225 Difference]: With dead ends: 4501 [2021-06-12 15:29:47,739 INFO L226 Difference]: Without dead ends: 4231 [2021-06-12 15:29:47,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:29:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-12 15:29:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2863. [2021-06-12 15:29:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.752620545073375) internal successors, (7878), 2862 states have internal predecessors, (7878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7878 transitions. [2021-06-12 15:29:47,783 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7878 transitions. Word has length 125 [2021-06-12 15:29:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:47,783 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7878 transitions. [2021-06-12 15:29:47,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7878 transitions. [2021-06-12 15:29:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:47,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:47,786 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:47,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:47,986 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:47,987 INFO L82 PathProgramCache]: Analyzing trace with hash 186418533, now seen corresponding path program 169 times [2021-06-12 15:29:47,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:47,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572694287] [2021-06-12 15:29:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:48,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:48,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572694287] [2021-06-12 15:29:48,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572694287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:48,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054664780] [2021-06-12 15:29:48,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:48,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:48,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:48,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054664780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:48,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:48,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:48,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436952688] [2021-06-12 15:29:48,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:48,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:48,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:48,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:48,379 INFO L87 Difference]: Start difference. First operand 2863 states and 7878 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:48,813 INFO L93 Difference]: Finished difference Result 4531 states and 11417 transitions. [2021-06-12 15:29:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:29:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:48,818 INFO L225 Difference]: With dead ends: 4531 [2021-06-12 15:29:48,818 INFO L226 Difference]: Without dead ends: 4261 [2021-06-12 15:29:48,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 474.7ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:29:48,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-12 15:29:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2938. [2021-06-12 15:29:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.758937691521961) internal successors, (8103), 2937 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:48,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8103 transitions. [2021-06-12 15:29:48,851 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8103 transitions. Word has length 125 [2021-06-12 15:29:48,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:48,851 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8103 transitions. [2021-06-12 15:29:48,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8103 transitions. [2021-06-12 15:29:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:48,853 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:48,853 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:49,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-12 15:29:49,054 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2008907179, now seen corresponding path program 170 times [2021-06-12 15:29:49,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:49,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456008790] [2021-06-12 15:29:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:49,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:49,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456008790] [2021-06-12 15:29:49,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456008790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:49,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757000756] [2021-06-12 15:29:49,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:49,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:49,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:49,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:49,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:49,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757000756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:49,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:49,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:49,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719966918] [2021-06-12 15:29:49,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:49,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:49,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:49,485 INFO L87 Difference]: Start difference. First operand 2938 states and 8103 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:49,978 INFO L93 Difference]: Finished difference Result 4556 states and 11542 transitions. [2021-06-12 15:29:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:29:49,979 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:49,983 INFO L225 Difference]: With dead ends: 4556 [2021-06-12 15:29:49,983 INFO L226 Difference]: Without dead ends: 4286 [2021-06-12 15:29:49,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:29:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-12 15:29:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3013. [2021-06-12 15:29:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.764940239043825) internal successors, (8328), 3012 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8328 transitions. [2021-06-12 15:29:50,021 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8328 transitions. Word has length 125 [2021-06-12 15:29:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:50,021 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8328 transitions. [2021-06-12 15:29:50,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8328 transitions. [2021-06-12 15:29:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:50,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:50,023 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:50,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 15:29:50,224 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash -498707101, now seen corresponding path program 171 times [2021-06-12 15:29:50,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:50,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984696579] [2021-06-12 15:29:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:50,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:50,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984696579] [2021-06-12 15:29:50,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984696579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:50,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289711860] [2021-06-12 15:29:50,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:50,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:29:50,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:50,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:29:50,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:50,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289711860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:50,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:50,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:50,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537735766] [2021-06-12 15:29:50,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:50,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:50,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:50,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:50,605 INFO L87 Difference]: Start difference. First operand 3013 states and 8328 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:51,051 INFO L93 Difference]: Finished difference Result 4581 states and 11667 transitions. [2021-06-12 15:29:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:29:51,051 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:51,055 INFO L225 Difference]: With dead ends: 4581 [2021-06-12 15:29:51,055 INFO L226 Difference]: Without dead ends: 4311 [2021-06-12 15:29:51,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 466.9ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:29:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-12 15:29:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3088. [2021-06-12 15:29:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.770651117589893) internal successors, (8553), 3087 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8553 transitions. [2021-06-12 15:29:51,103 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8553 transitions. Word has length 125 [2021-06-12 15:29:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:51,103 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8553 transitions. [2021-06-12 15:29:51,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8553 transitions. [2021-06-12 15:29:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:51,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:51,105 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:51,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 15:29:51,306 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:51,306 INFO L82 PathProgramCache]: Analyzing trace with hash 140951123, now seen corresponding path program 172 times [2021-06-12 15:29:51,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:51,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999524406] [2021-06-12 15:29:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:51,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:51,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999524406] [2021-06-12 15:29:51,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999524406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:51,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597452743] [2021-06-12 15:29:51,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:51,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:51,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:51,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:51,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597452743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:51,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:51,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:51,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271260739] [2021-06-12 15:29:51,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:51,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:51,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:51,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:51,703 INFO L87 Difference]: Start difference. First operand 3088 states and 8553 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:52,239 INFO L93 Difference]: Finished difference Result 4606 states and 11792 transitions. [2021-06-12 15:29:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:29:52,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:52,243 INFO L225 Difference]: With dead ends: 4606 [2021-06-12 15:29:52,244 INFO L226 Difference]: Without dead ends: 4336 [2021-06-12 15:29:52,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 560.6ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-06-12 15:29:52,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3163. [2021-06-12 15:29:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.7760910815939277) internal successors, (8778), 3162 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8778 transitions. [2021-06-12 15:29:52,283 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8778 transitions. Word has length 125 [2021-06-12 15:29:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:52,283 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8778 transitions. [2021-06-12 15:29:52,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8778 transitions. [2021-06-12 15:29:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:52,285 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:52,285 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:52,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-12 15:29:52,497 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash -633967903, now seen corresponding path program 173 times [2021-06-12 15:29:52,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:52,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078530372] [2021-06-12 15:29:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:52,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:52,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078530372] [2021-06-12 15:29:52,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078530372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:52,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718489165] [2021-06-12 15:29:52,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:52,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:29:52,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:52,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:52,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:52,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718489165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:52,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:52,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:52,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143274233] [2021-06-12 15:29:52,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:52,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:52,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:52,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:52,888 INFO L87 Difference]: Start difference. First operand 3163 states and 8778 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:53,374 INFO L93 Difference]: Finished difference Result 4631 states and 11917 transitions. [2021-06-12 15:29:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:29:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:53,378 INFO L225 Difference]: With dead ends: 4631 [2021-06-12 15:29:53,378 INFO L226 Difference]: Without dead ends: 4361 [2021-06-12 15:29:53,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-06-12 15:29:53,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3238. [2021-06-12 15:29:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 2.7812789620018536) internal successors, (9003), 3237 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 9003 transitions. [2021-06-12 15:29:53,416 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 9003 transitions. Word has length 125 [2021-06-12 15:29:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:53,417 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 9003 transitions. [2021-06-12 15:29:53,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 9003 transitions. [2021-06-12 15:29:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:53,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:53,419 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:53,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:53,633 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:53,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1087881263, now seen corresponding path program 174 times [2021-06-12 15:29:53,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:53,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774819462] [2021-06-12 15:29:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:53,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:53,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774819462] [2021-06-12 15:29:53,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774819462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:53,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642597508] [2021-06-12 15:29:53,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:53,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:29:53,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:54,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642597508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:54,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:54,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:54,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869850988] [2021-06-12 15:29:54,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:54,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:54,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:54,028 INFO L87 Difference]: Start difference. First operand 3238 states and 9003 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:54,643 INFO L93 Difference]: Finished difference Result 4656 states and 12042 transitions. [2021-06-12 15:29:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:29:54,643 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:54,647 INFO L225 Difference]: With dead ends: 4656 [2021-06-12 15:29:54,647 INFO L226 Difference]: Without dead ends: 4386 [2021-06-12 15:29:54,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:29:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-12 15:29:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3313. [2021-06-12 15:29:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.786231884057971) internal successors, (9228), 3312 states have internal predecessors, (9228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9228 transitions. [2021-06-12 15:29:54,687 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9228 transitions. Word has length 125 [2021-06-12 15:29:54,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:54,687 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9228 transitions. [2021-06-12 15:29:54,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9228 transitions. [2021-06-12 15:29:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:54,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:54,689 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:54,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-12 15:29:54,890 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:54,890 INFO L82 PathProgramCache]: Analyzing trace with hash -209869345, now seen corresponding path program 175 times [2021-06-12 15:29:54,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:54,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601433857] [2021-06-12 15:29:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:55,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:55,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601433857] [2021-06-12 15:29:55,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601433857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:55,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628685930] [2021-06-12 15:29:55,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:55,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:55,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:55,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628685930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:55,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:55,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:55,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767733964] [2021-06-12 15:29:55,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:55,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:55,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:55,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:55,250 INFO L87 Difference]: Start difference. First operand 3313 states and 9228 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:55,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:55,768 INFO L93 Difference]: Finished difference Result 4681 states and 12167 transitions. [2021-06-12 15:29:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:29:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:55,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:55,773 INFO L225 Difference]: With dead ends: 4681 [2021-06-12 15:29:55,773 INFO L226 Difference]: Without dead ends: 4411 [2021-06-12 15:29:55,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 509.5ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:29:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-12 15:29:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3388. [2021-06-12 15:29:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.7909654561558903) internal successors, (9453), 3387 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9453 transitions. [2021-06-12 15:29:55,818 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9453 transitions. Word has length 125 [2021-06-12 15:29:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:55,818 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9453 transitions. [2021-06-12 15:29:55,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9453 transitions. [2021-06-12 15:29:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:55,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:55,821 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:56,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:56,021 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:56,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1109924145, now seen corresponding path program 176 times [2021-06-12 15:29:56,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:56,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689991152] [2021-06-12 15:29:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:56,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:56,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689991152] [2021-06-12 15:29:56,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689991152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:56,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000057521] [2021-06-12 15:29:56,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:56,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:56,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:56,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:56,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:56,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000057521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:56,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:56,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:56,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88892316] [2021-06-12 15:29:56,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:56,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:56,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:56,432 INFO L87 Difference]: Start difference. First operand 3388 states and 9453 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:57,062 INFO L93 Difference]: Finished difference Result 4706 states and 12292 transitions. [2021-06-12 15:29:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:29:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:57,067 INFO L225 Difference]: With dead ends: 4706 [2021-06-12 15:29:57,067 INFO L226 Difference]: Without dead ends: 4436 [2021-06-12 15:29:57,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 636.9ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:29:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-12 15:29:57,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3463. [2021-06-12 15:29:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7954939341421143) internal successors, (9678), 3462 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9678 transitions. [2021-06-12 15:29:57,108 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9678 transitions. Word has length 125 [2021-06-12 15:29:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:57,109 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9678 transitions. [2021-06-12 15:29:57,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9678 transitions. [2021-06-12 15:29:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:57,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:57,111 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:57,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:57,312 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:57,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:57,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1538988451, now seen corresponding path program 177 times [2021-06-12 15:29:57,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:57,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026806479] [2021-06-12 15:29:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:57,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:57,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026806479] [2021-06-12 15:29:57,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026806479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:57,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316828413] [2021-06-12 15:29:57,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:57,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:29:57,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:57,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:29:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:57,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316828413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:57,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:57,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:57,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089467682] [2021-06-12 15:29:57,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:57,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:57,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:57,677 INFO L87 Difference]: Start difference. First operand 3463 states and 9678 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:58,234 INFO L93 Difference]: Finished difference Result 4731 states and 12417 transitions. [2021-06-12 15:29:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:29:58,234 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:58,239 INFO L225 Difference]: With dead ends: 4731 [2021-06-12 15:29:58,239 INFO L226 Difference]: Without dead ends: 4461 [2021-06-12 15:29:58,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 541.7ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:29:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-12 15:29:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3538. [2021-06-12 15:29:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.799830364715861) internal successors, (9903), 3537 states have internal predecessors, (9903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9903 transitions. [2021-06-12 15:29:58,287 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9903 transitions. Word has length 125 [2021-06-12 15:29:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:58,287 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9903 transitions. [2021-06-12 15:29:58,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9903 transitions. [2021-06-12 15:29:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:58,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:58,290 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:58,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:58,491 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:58,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2069795661, now seen corresponding path program 178 times [2021-06-12 15:29:58,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:58,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521362924] [2021-06-12 15:29:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:58,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:58,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521362924] [2021-06-12 15:29:58,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521362924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:58,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575400757] [2021-06-12 15:29:58,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:58,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:58,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:58,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:58,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:58,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575400757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:58,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:58,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:58,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783192792] [2021-06-12 15:29:58,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:58,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:58,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:58,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:58,866 INFO L87 Difference]: Start difference. First operand 3538 states and 9903 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:59,549 INFO L93 Difference]: Finished difference Result 4756 states and 12542 transitions. [2021-06-12 15:29:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:29:59,549 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:29:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:59,553 INFO L225 Difference]: With dead ends: 4756 [2021-06-12 15:29:59,553 INFO L226 Difference]: Without dead ends: 4486 [2021-06-12 15:29:59,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:29:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-12 15:29:59,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3613. [2021-06-12 15:29:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.8039867109634553) internal successors, (10128), 3612 states have internal predecessors, (10128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10128 transitions. [2021-06-12 15:29:59,596 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10128 transitions. Word has length 125 [2021-06-12 15:29:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:59,596 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10128 transitions. [2021-06-12 15:29:59,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10128 transitions. [2021-06-12 15:29:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:59,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:59,599 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:59,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:59,800 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:59,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:59,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1984760923, now seen corresponding path program 179 times [2021-06-12 15:29:59,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:59,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255318950] [2021-06-12 15:29:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:59,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:59,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255318950] [2021-06-12 15:29:59,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255318950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:59,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100211120] [2021-06-12 15:29:59,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:00,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:30:00,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:30:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:00,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100211120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:00,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:00,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:30:00,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739821234] [2021-06-12 15:30:00,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:30:00,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:30:00,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:30:00,159 INFO L87 Difference]: Start difference. First operand 3613 states and 10128 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:00,755 INFO L93 Difference]: Finished difference Result 4781 states and 12667 transitions. [2021-06-12 15:30:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:30:00,756 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:30:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:00,760 INFO L225 Difference]: With dead ends: 4781 [2021-06-12 15:30:00,760 INFO L226 Difference]: Without dead ends: 4511 [2021-06-12 15:30:00,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 569.5ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:30:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-12 15:30:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3688. [2021-06-12 15:30:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.807973962571196) internal successors, (10353), 3687 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10353 transitions. [2021-06-12 15:30:00,806 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10353 transitions. Word has length 125 [2021-06-12 15:30:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:00,806 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10353 transitions. [2021-06-12 15:30:00,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10353 transitions. [2021-06-12 15:30:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:00,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:00,809 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:01,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-12 15:30:01,010 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:01,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:01,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1916609867, now seen corresponding path program 180 times [2021-06-12 15:30:01,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:01,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74539105] [2021-06-12 15:30:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:01,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:01,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74539105] [2021-06-12 15:30:01,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74539105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:01,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749677704] [2021-06-12 15:30:01,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:01,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:30:01,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:01,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:30:01,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:01,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749677704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:01,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:01,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:30:01,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197410613] [2021-06-12 15:30:01,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:01,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:01,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:01,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:01,423 INFO L87 Difference]: Start difference. First operand 3688 states and 10353 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:02,243 INFO L93 Difference]: Finished difference Result 4806 states and 12792 transitions. [2021-06-12 15:30:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:30:02,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:30:02,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:02,248 INFO L225 Difference]: With dead ends: 4806 [2021-06-12 15:30:02,248 INFO L226 Difference]: Without dead ends: 4536 [2021-06-12 15:30:02,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 753.1ms TimeCoverageRelationStatistics Valid=937, Invalid=2969, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:30:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-12 15:30:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3763. [2021-06-12 15:30:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.8118022328548644) internal successors, (10578), 3762 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10578 transitions. [2021-06-12 15:30:02,293 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10578 transitions. Word has length 125 [2021-06-12 15:30:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:02,294 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10578 transitions. [2021-06-12 15:30:02,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10578 transitions. [2021-06-12 15:30:02,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:02,297 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:02,297 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:02,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-12 15:30:02,497 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:02,498 INFO L82 PathProgramCache]: Analyzing trace with hash 619640793, now seen corresponding path program 181 times [2021-06-12 15:30:02,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:02,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336776910] [2021-06-12 15:30:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:02,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:02,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336776910] [2021-06-12 15:30:02,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336776910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:02,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741228553] [2021-06-12 15:30:02,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:02,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:30:02,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:02,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741228553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:02,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:02,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:30:02,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151638929] [2021-06-12 15:30:02,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:30:02,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:02,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:30:02,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:30:02,866 INFO L87 Difference]: Start difference. First operand 3763 states and 10578 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:03,524 INFO L93 Difference]: Finished difference Result 4831 states and 12917 transitions. [2021-06-12 15:30:03,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:30:03,524 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:30:03,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:03,529 INFO L225 Difference]: With dead ends: 4831 [2021-06-12 15:30:03,529 INFO L226 Difference]: Without dead ends: 4561 [2021-06-12 15:30:03,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:30:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-12 15:30:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3838. [2021-06-12 15:30:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.815480844409695) internal successors, (10803), 3837 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10803 transitions. [2021-06-12 15:30:03,577 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10803 transitions. Word has length 125 [2021-06-12 15:30:03,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:03,577 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10803 transitions. [2021-06-12 15:30:03,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:03,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10803 transitions. [2021-06-12 15:30:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:03,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:03,580 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:03,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 15:30:03,781 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1049394377, now seen corresponding path program 182 times [2021-06-12 15:30:03,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:03,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205825053] [2021-06-12 15:30:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:03,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:03,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205825053] [2021-06-12 15:30:03,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205825053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:03,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230612296] [2021-06-12 15:30:03,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:04,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:04,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:04,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:30:04,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:04,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230612296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:04,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:04,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:30:04,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969156364] [2021-06-12 15:30:04,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:04,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:04,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:04,192 INFO L87 Difference]: Start difference. First operand 3838 states and 10803 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:05,051 INFO L93 Difference]: Finished difference Result 4916 states and 13207 transitions. [2021-06-12 15:30:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:30:05,052 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:30:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:05,056 INFO L225 Difference]: With dead ends: 4916 [2021-06-12 15:30:05,056 INFO L226 Difference]: Without dead ends: 4646 [2021-06-12 15:30:05,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:30:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-06-12 15:30:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3913. [2021-06-12 15:30:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.8241308793456033) internal successors, (11048), 3912 states have internal predecessors, (11048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 11048 transitions. [2021-06-12 15:30:05,102 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 11048 transitions. Word has length 125 [2021-06-12 15:30:05,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:05,102 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 11048 transitions. [2021-06-12 15:30:05,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:05,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 11048 transitions. [2021-06-12 15:30:05,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:05,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:05,106 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:05,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:05,307 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:05,307 INFO L82 PathProgramCache]: Analyzing trace with hash 991660247, now seen corresponding path program 183 times [2021-06-12 15:30:05,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:05,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456753678] [2021-06-12 15:30:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:05,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:05,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456753678] [2021-06-12 15:30:05,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456753678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:05,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711670024] [2021-06-12 15:30:05,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:05,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:30:05,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:05,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:05,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711670024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:05,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:05,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:30:05,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079446529] [2021-06-12 15:30:05,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:30:05,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:05,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:30:05,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:30:05,707 INFO L87 Difference]: Start difference. First operand 3913 states and 11048 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:06,393 INFO L93 Difference]: Finished difference Result 5658 states and 15331 transitions. [2021-06-12 15:30:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:30:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:30:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:06,398 INFO L225 Difference]: With dead ends: 5658 [2021-06-12 15:30:06,399 INFO L226 Difference]: Without dead ends: 5388 [2021-06-12 15:30:06,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:30:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-06-12 15:30:06,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4093. [2021-06-12 15:30:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 2.8365102639296187) internal successors, (11607), 4092 states have internal predecessors, (11607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11607 transitions. [2021-06-12 15:30:06,446 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11607 transitions. Word has length 125 [2021-06-12 15:30:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:06,446 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 11607 transitions. [2021-06-12 15:30:06,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11607 transitions. [2021-06-12 15:30:06,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:06,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:06,450 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:06,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:06,653 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1014003497, now seen corresponding path program 184 times [2021-06-12 15:30:06,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:06,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820708093] [2021-06-12 15:30:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:06,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:06,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820708093] [2021-06-12 15:30:06,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820708093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:06,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56909862] [2021-06-12 15:30:06,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:06,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:06,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:06,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:30:06,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:07,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56909862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:07,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:07,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:30:07,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469196322] [2021-06-12 15:30:07,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:07,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:07,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:07,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:07,078 INFO L87 Difference]: Start difference. First operand 4093 states and 11607 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:07,996 INFO L93 Difference]: Finished difference Result 5120 states and 13981 transitions. [2021-06-12 15:30:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:30:07,997 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:30:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:08,002 INFO L225 Difference]: With dead ends: 5120 [2021-06-12 15:30:08,002 INFO L226 Difference]: Without dead ends: 4631 [2021-06-12 15:30:08,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 876.9ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:30:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-06-12 15:30:08,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2634. [2021-06-12 15:30:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 2.7406000759589824) internal successors, (7216), 2633 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-06-12 15:30:08,058 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-06-12 15:30:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:08,058 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-06-12 15:30:08,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-06-12 15:30:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:08,060 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:08,060 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:08,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:08,260 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:08,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1934097443, now seen corresponding path program 185 times [2021-06-12 15:30:08,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:08,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665931032] [2021-06-12 15:30:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:08,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:08,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665931032] [2021-06-12 15:30:08,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665931032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:08,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709665544] [2021-06-12 15:30:08,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:08,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:08,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:08,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:08,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:08,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709665544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:08,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:08,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:08,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679050732] [2021-06-12 15:30:08,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:08,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:08,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:08,698 INFO L87 Difference]: Start difference. First operand 2634 states and 7216 transitions. Second operand has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:09,168 INFO L93 Difference]: Finished difference Result 3774 states and 9816 transitions. [2021-06-12 15:30:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:30:09,169 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:09,172 INFO L225 Difference]: With dead ends: 3774 [2021-06-12 15:30:09,172 INFO L226 Difference]: Without dead ends: 3440 [2021-06-12 15:30:09,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 517.8ms TimeCoverageRelationStatistics Valid=760, Invalid=2102, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:30:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-06-12 15:30:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2719. [2021-06-12 15:30:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 2.717439293598234) internal successors, (7386), 2718 states have internal predecessors, (7386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 7386 transitions. [2021-06-12 15:30:09,201 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 7386 transitions. Word has length 130 [2021-06-12 15:30:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:09,201 INFO L482 AbstractCegarLoop]: Abstraction has 2719 states and 7386 transitions. [2021-06-12 15:30:09,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 7386 transitions. [2021-06-12 15:30:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:09,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:09,204 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:09,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:09,404 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:09,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2037815609, now seen corresponding path program 186 times [2021-06-12 15:30:09,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:09,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511200899] [2021-06-12 15:30:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:09,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:09,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511200899] [2021-06-12 15:30:09,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511200899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:09,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825194098] [2021-06-12 15:30:09,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:09,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:09,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:09,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:09,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:09,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825194098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:09,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:09,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:09,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083990913] [2021-06-12 15:30:09,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:09,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:09,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:09,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:09,870 INFO L87 Difference]: Start difference. First operand 2719 states and 7386 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:10,243 INFO L93 Difference]: Finished difference Result 4696 states and 11597 transitions. [2021-06-12 15:30:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:30:10,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:10,248 INFO L225 Difference]: With dead ends: 4696 [2021-06-12 15:30:10,248 INFO L226 Difference]: Without dead ends: 4426 [2021-06-12 15:30:10,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 444.7ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:30:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-12 15:30:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 2863. [2021-06-12 15:30:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7264150943396226) internal successors, (7803), 2862 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7803 transitions. [2021-06-12 15:30:10,282 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7803 transitions. Word has length 130 [2021-06-12 15:30:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:10,282 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7803 transitions. [2021-06-12 15:30:10,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7803 transitions. [2021-06-12 15:30:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:10,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:10,284 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:10,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-12 15:30:10,486 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:10,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:10,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1614777271, now seen corresponding path program 187 times [2021-06-12 15:30:10,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:10,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602576414] [2021-06-12 15:30:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:10,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:10,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602576414] [2021-06-12 15:30:10,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602576414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:10,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986035391] [2021-06-12 15:30:10,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:10,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:10,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:10,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986035391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:10,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:10,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:10,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973084880] [2021-06-12 15:30:10,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:10,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:10,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:10,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:10,960 INFO L87 Difference]: Start difference. First operand 2863 states and 7803 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:11,417 INFO L93 Difference]: Finished difference Result 4656 states and 11592 transitions. [2021-06-12 15:30:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:30:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:11,421 INFO L225 Difference]: With dead ends: 4656 [2021-06-12 15:30:11,421 INFO L226 Difference]: Without dead ends: 4386 [2021-06-12 15:30:11,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 544.5ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:30:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-12 15:30:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 2938. [2021-06-12 15:30:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7334014300306437) internal successors, (8028), 2937 states have internal predecessors, (8028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8028 transitions. [2021-06-12 15:30:11,461 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8028 transitions. Word has length 130 [2021-06-12 15:30:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:11,461 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8028 transitions. [2021-06-12 15:30:11,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8028 transitions. [2021-06-12 15:30:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:11,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:11,463 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:11,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:11,664 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1568230341, now seen corresponding path program 188 times [2021-06-12 15:30:11,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:11,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984399035] [2021-06-12 15:30:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:11,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:11,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984399035] [2021-06-12 15:30:11,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984399035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:11,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376391258] [2021-06-12 15:30:11,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:12,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:12,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:12,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:12,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376391258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:12,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:12,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:12,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092634056] [2021-06-12 15:30:12,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:12,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:12,178 INFO L87 Difference]: Start difference. First operand 2938 states and 8028 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:12,627 INFO L93 Difference]: Finished difference Result 4706 states and 11767 transitions. [2021-06-12 15:30:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:30:12,627 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:12,632 INFO L225 Difference]: With dead ends: 4706 [2021-06-12 15:30:12,632 INFO L226 Difference]: Without dead ends: 4436 [2021-06-12 15:30:12,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 516.2ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:30:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-12 15:30:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3013. [2021-06-12 15:30:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.74003984063745) internal successors, (8253), 3012 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8253 transitions. [2021-06-12 15:30:12,675 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8253 transitions. Word has length 130 [2021-06-12 15:30:12,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:12,675 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8253 transitions. [2021-06-12 15:30:12,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8253 transitions. [2021-06-12 15:30:12,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:12,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:12,678 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:12,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:12,895 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash 649845941, now seen corresponding path program 189 times [2021-06-12 15:30:12,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:12,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327922572] [2021-06-12 15:30:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:13,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:13,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327922572] [2021-06-12 15:30:13,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327922572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:13,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115464128] [2021-06-12 15:30:13,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:13,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:13,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:13,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:13,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:13,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115464128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:13,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:13,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:13,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070311596] [2021-06-12 15:30:13,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:13,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:13,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:13,483 INFO L87 Difference]: Start difference. First operand 3013 states and 8253 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:14,030 INFO L93 Difference]: Finished difference Result 4731 states and 11892 transitions. [2021-06-12 15:30:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:30:14,031 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:14,035 INFO L225 Difference]: With dead ends: 4731 [2021-06-12 15:30:14,035 INFO L226 Difference]: Without dead ends: 4461 [2021-06-12 15:30:14,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 593.2ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:30:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-12 15:30:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3088. [2021-06-12 15:30:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.746355685131195) internal successors, (8478), 3087 states have internal predecessors, (8478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8478 transitions. [2021-06-12 15:30:14,071 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8478 transitions. Word has length 130 [2021-06-12 15:30:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:14,071 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8478 transitions. [2021-06-12 15:30:14,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8478 transitions. [2021-06-12 15:30:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:14,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:14,073 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:14,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:14,274 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:14,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1126844861, now seen corresponding path program 190 times [2021-06-12 15:30:14,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:14,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102885646] [2021-06-12 15:30:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:14,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:14,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102885646] [2021-06-12 15:30:14,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102885646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:14,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303353617] [2021-06-12 15:30:14,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:14,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:14,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:14,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:14,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303353617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:14,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:14,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:14,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10188209] [2021-06-12 15:30:14,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:14,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:14,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:14,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:14,739 INFO L87 Difference]: Start difference. First operand 3088 states and 8478 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:15,235 INFO L93 Difference]: Finished difference Result 4756 states and 12017 transitions. [2021-06-12 15:30:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:30:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:15,239 INFO L225 Difference]: With dead ends: 4756 [2021-06-12 15:30:15,240 INFO L226 Difference]: Without dead ends: 4486 [2021-06-12 15:30:15,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 581.8ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:30:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-12 15:30:15,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3163. [2021-06-12 15:30:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.752371916508539) internal successors, (8703), 3162 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8703 transitions. [2021-06-12 15:30:15,282 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8703 transitions. Word has length 130 [2021-06-12 15:30:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:15,282 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8703 transitions. [2021-06-12 15:30:15,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8703 transitions. [2021-06-12 15:30:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:15,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:15,284 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:15,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:15,485 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:15,485 INFO L82 PathProgramCache]: Analyzing trace with hash 972796723, now seen corresponding path program 191 times [2021-06-12 15:30:15,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:15,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686189109] [2021-06-12 15:30:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:15,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686189109] [2021-06-12 15:30:15,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686189109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265575185] [2021-06-12 15:30:15,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:15,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:15,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265575185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:15,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:15,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:15,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71885098] [2021-06-12 15:30:15,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:15,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:15,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:15,940 INFO L87 Difference]: Start difference. First operand 3163 states and 8703 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:16,487 INFO L93 Difference]: Finished difference Result 4781 states and 12142 transitions. [2021-06-12 15:30:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:30:16,487 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:16,492 INFO L225 Difference]: With dead ends: 4781 [2021-06-12 15:30:16,492 INFO L226 Difference]: Without dead ends: 4511 [2021-06-12 15:30:16,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 616.7ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:30:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-12 15:30:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3238. [2021-06-12 15:30:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 2.7581093605189992) internal successors, (8928), 3237 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 8928 transitions. [2021-06-12 15:30:16,529 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 8928 transitions. Word has length 130 [2021-06-12 15:30:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:16,530 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 8928 transitions. [2021-06-12 15:30:16,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 8928 transitions. [2021-06-12 15:30:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:16,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:16,532 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:16,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-12 15:30:16,732 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1811970495, now seen corresponding path program 192 times [2021-06-12 15:30:16,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:16,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336559087] [2021-06-12 15:30:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:16,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:16,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336559087] [2021-06-12 15:30:16,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336559087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:16,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228957197] [2021-06-12 15:30:16,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:17,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:17,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228957197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:17,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:17,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:17,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109619027] [2021-06-12 15:30:17,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:17,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:17,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:17,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:17,149 INFO L87 Difference]: Start difference. First operand 3238 states and 8928 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:17,689 INFO L93 Difference]: Finished difference Result 4806 states and 12267 transitions. [2021-06-12 15:30:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:30:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:17,694 INFO L225 Difference]: With dead ends: 4806 [2021-06-12 15:30:17,695 INFO L226 Difference]: Without dead ends: 4536 [2021-06-12 15:30:17,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 558.4ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:30:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-12 15:30:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3313. [2021-06-12 15:30:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.7635869565217392) internal successors, (9153), 3312 states have internal predecessors, (9153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9153 transitions. [2021-06-12 15:30:17,735 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9153 transitions. Word has length 130 [2021-06-12 15:30:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:17,736 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9153 transitions. [2021-06-12 15:30:17,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9153 transitions. [2021-06-12 15:30:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:17,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:17,738 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:17,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 15:30:17,939 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:17,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1172312271, now seen corresponding path program 193 times [2021-06-12 15:30:17,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:17,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519899343] [2021-06-12 15:30:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:18,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:18,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519899343] [2021-06-12 15:30:18,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519899343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:18,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993166545] [2021-06-12 15:30:18,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:18,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:18,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:18,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993166545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:18,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:18,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:18,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069332864] [2021-06-12 15:30:18,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:18,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:18,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:18,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:18,377 INFO L87 Difference]: Start difference. First operand 3313 states and 9153 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:19,010 INFO L93 Difference]: Finished difference Result 4831 states and 12392 transitions. [2021-06-12 15:30:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:30:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:19,015 INFO L225 Difference]: With dead ends: 4831 [2021-06-12 15:30:19,016 INFO L226 Difference]: Without dead ends: 4561 [2021-06-12 15:30:19,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 647.6ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:30:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-12 15:30:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3388. [2021-06-12 15:30:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.7688219663418954) internal successors, (9378), 3387 states have internal predecessors, (9378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9378 transitions. [2021-06-12 15:30:19,061 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9378 transitions. Word has length 130 [2021-06-12 15:30:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:19,061 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9378 transitions. [2021-06-12 15:30:19,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9378 transitions. [2021-06-12 15:30:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:19,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:19,064 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:19,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 15:30:19,264 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1947231297, now seen corresponding path program 194 times [2021-06-12 15:30:19,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:19,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615661132] [2021-06-12 15:30:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:19,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:19,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615661132] [2021-06-12 15:30:19,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615661132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:19,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932674893] [2021-06-12 15:30:19,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:19,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:19,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:19,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932674893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:19,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:19,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:19,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966653680] [2021-06-12 15:30:19,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:19,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:19,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:19,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:19,657 INFO L87 Difference]: Start difference. First operand 3388 states and 9378 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:20,228 INFO L93 Difference]: Finished difference Result 4856 states and 12517 transitions. [2021-06-12 15:30:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:30:20,228 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:20,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:20,232 INFO L225 Difference]: With dead ends: 4856 [2021-06-12 15:30:20,232 INFO L226 Difference]: Without dead ends: 4586 [2021-06-12 15:30:20,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:30:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-06-12 15:30:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 3463. [2021-06-12 15:30:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7738301559792027) internal successors, (9603), 3462 states have internal predecessors, (9603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9603 transitions. [2021-06-12 15:30:20,271 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9603 transitions. Word has length 130 [2021-06-12 15:30:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:20,271 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9603 transitions. [2021-06-12 15:30:20,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9603 transitions. [2021-06-12 15:30:20,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:20,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:20,274 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:20,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 15:30:20,474 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:20,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1893822639, now seen corresponding path program 195 times [2021-06-12 15:30:20,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:20,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862245770] [2021-06-12 15:30:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:20,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:20,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862245770] [2021-06-12 15:30:20,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862245770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:20,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537183892] [2021-06-12 15:30:20,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:20,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:20,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:30:20,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:20,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537183892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:20,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:20,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:20,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309314299] [2021-06-12 15:30:20,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:20,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:20,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:20,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:20,936 INFO L87 Difference]: Start difference. First operand 3463 states and 9603 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:21,661 INFO L93 Difference]: Finished difference Result 4881 states and 12642 transitions. [2021-06-12 15:30:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:30:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:21,666 INFO L225 Difference]: With dead ends: 4881 [2021-06-12 15:30:21,666 INFO L226 Difference]: Without dead ends: 4611 [2021-06-12 15:30:21,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 720.2ms TimeCoverageRelationStatistics Valid=734, Invalid=2572, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:30:21,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-06-12 15:30:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 3538. [2021-06-12 15:30:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.7786259541984735) internal successors, (9828), 3537 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9828 transitions. [2021-06-12 15:30:21,714 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9828 transitions. Word has length 130 [2021-06-12 15:30:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:21,714 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9828 transitions. [2021-06-12 15:30:21,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9828 transitions. [2021-06-12 15:30:21,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:21,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:21,717 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:21,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:21,929 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1523132739, now seen corresponding path program 196 times [2021-06-12 15:30:21,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:21,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041318687] [2021-06-12 15:30:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:22,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:22,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041318687] [2021-06-12 15:30:22,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041318687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:22,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345123311] [2021-06-12 15:30:22,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:22,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:22,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:22,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:22,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345123311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:22,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:22,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:22,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634201563] [2021-06-12 15:30:22,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:22,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:22,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:22,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:22,356 INFO L87 Difference]: Start difference. First operand 3538 states and 9828 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:22,932 INFO L93 Difference]: Finished difference Result 4906 states and 12767 transitions. [2021-06-12 15:30:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:30:22,932 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:22,937 INFO L225 Difference]: With dead ends: 4906 [2021-06-12 15:30:22,937 INFO L226 Difference]: Without dead ends: 4636 [2021-06-12 15:30:22,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 594.5ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:30:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-12 15:30:22,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3613. [2021-06-12 15:30:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.7832225913621262) internal successors, (10053), 3612 states have internal predecessors, (10053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10053 transitions. [2021-06-12 15:30:22,982 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10053 transitions. Word has length 130 [2021-06-12 15:30:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:22,983 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10053 transitions. [2021-06-12 15:30:22,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:22,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10053 transitions. [2021-06-12 15:30:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:22,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:22,986 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:23,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-12 15:30:23,186 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:23,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1871779757, now seen corresponding path program 197 times [2021-06-12 15:30:23,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:23,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68784343] [2021-06-12 15:30:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:23,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:23,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68784343] [2021-06-12 15:30:23,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68784343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:23,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884150026] [2021-06-12 15:30:23,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:23,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:23,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:23,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:23,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:23,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884150026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:23,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:23,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:23,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784218045] [2021-06-12 15:30:23,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:23,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:23,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:23,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:23,603 INFO L87 Difference]: Start difference. First operand 3613 states and 10053 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:24,333 INFO L93 Difference]: Finished difference Result 4931 states and 12892 transitions. [2021-06-12 15:30:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:30:24,333 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:24,338 INFO L225 Difference]: With dead ends: 4931 [2021-06-12 15:30:24,338 INFO L226 Difference]: Without dead ends: 4661 [2021-06-12 15:30:24,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 707.6ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:30:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-12 15:30:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3688. [2021-06-12 15:30:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.787632221318145) internal successors, (10278), 3687 states have internal predecessors, (10278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10278 transitions. [2021-06-12 15:30:24,383 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10278 transitions. Word has length 130 [2021-06-12 15:30:24,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:24,383 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10278 transitions. [2021-06-12 15:30:24,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10278 transitions. [2021-06-12 15:30:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:24,386 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:24,386 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:24,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:24,586 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:24,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1442715451, now seen corresponding path program 198 times [2021-06-12 15:30:24,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:24,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424654992] [2021-06-12 15:30:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:24,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424654992] [2021-06-12 15:30:24,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424654992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21713676] [2021-06-12 15:30:24,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:24,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:24,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:24,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:24,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:24,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21713676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:24,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:24,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:24,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716694577] [2021-06-12 15:30:24,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:24,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:24,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:24,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:24,970 INFO L87 Difference]: Start difference. First operand 3688 states and 10278 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:25,591 INFO L93 Difference]: Finished difference Result 4956 states and 13017 transitions. [2021-06-12 15:30:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:30:25,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:25,596 INFO L225 Difference]: With dead ends: 4956 [2021-06-12 15:30:25,596 INFO L226 Difference]: Without dead ends: 4686 [2021-06-12 15:30:25,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 593.9ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:30:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2021-06-12 15:30:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3763. [2021-06-12 15:30:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.791866028708134) internal successors, (10503), 3762 states have internal predecessors, (10503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10503 transitions. [2021-06-12 15:30:25,642 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10503 transitions. Word has length 130 [2021-06-12 15:30:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:25,642 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10503 transitions. [2021-06-12 15:30:25,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10503 transitions. [2021-06-12 15:30:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:25,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:25,645 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:25,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 15:30:25,845 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:25,846 INFO L82 PathProgramCache]: Analyzing trace with hash 756532267, now seen corresponding path program 199 times [2021-06-12 15:30:25,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:25,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830870973] [2021-06-12 15:30:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:26,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:26,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830870973] [2021-06-12 15:30:26,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830870973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:26,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321302263] [2021-06-12 15:30:26,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:26,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:26,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321302263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:26,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:26,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:26,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119713720] [2021-06-12 15:30:26,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:26,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:26,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:26,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:26,287 INFO L87 Difference]: Start difference. First operand 3763 states and 10503 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:27,169 INFO L93 Difference]: Finished difference Result 4981 states and 13142 transitions. [2021-06-12 15:30:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:30:27,169 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:27,173 INFO L225 Difference]: With dead ends: 4981 [2021-06-12 15:30:27,173 INFO L226 Difference]: Without dead ends: 4711 [2021-06-12 15:30:27,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 832.5ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:30:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2021-06-12 15:30:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3838. [2021-06-12 15:30:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.7959343236903833) internal successors, (10728), 3837 states have internal predecessors, (10728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:27,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10728 transitions. [2021-06-12 15:30:27,222 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10728 transitions. Word has length 130 [2021-06-12 15:30:27,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:27,222 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10728 transitions. [2021-06-12 15:30:27,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10728 transitions. [2021-06-12 15:30:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:27,226 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:27,226 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:27,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:27,443 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:27,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:27,443 INFO L82 PathProgramCache]: Analyzing trace with hash 671497529, now seen corresponding path program 200 times [2021-06-12 15:30:27,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:27,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320358710] [2021-06-12 15:30:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:27,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:27,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320358710] [2021-06-12 15:30:27,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320358710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:27,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570106202] [2021-06-12 15:30:27,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:27,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:27,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:27,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:27,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570106202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:27,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:27,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:27,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639471360] [2021-06-12 15:30:27,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:27,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:27,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:27,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:27,825 INFO L87 Difference]: Start difference. First operand 3838 states and 10728 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:28,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:28,517 INFO L93 Difference]: Finished difference Result 5006 states and 13267 transitions. [2021-06-12 15:30:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:30:28,518 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:28,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:28,523 INFO L225 Difference]: With dead ends: 5006 [2021-06-12 15:30:28,524 INFO L226 Difference]: Without dead ends: 4736 [2021-06-12 15:30:28,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:30:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-12 15:30:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3913. [2021-06-12 15:30:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.7998466257668713) internal successors, (10953), 3912 states have internal predecessors, (10953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10953 transitions. [2021-06-12 15:30:28,585 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10953 transitions. Word has length 130 [2021-06-12 15:30:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:28,586 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10953 transitions. [2021-06-12 15:30:28,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10953 transitions. [2021-06-12 15:30:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:28,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:28,589 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:28,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:28,790 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:28,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:28,790 INFO L82 PathProgramCache]: Analyzing trace with hash 603346473, now seen corresponding path program 201 times [2021-06-12 15:30:28,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:28,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999140450] [2021-06-12 15:30:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:28,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:28,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999140450] [2021-06-12 15:30:28,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999140450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:28,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284509830] [2021-06-12 15:30:28,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:29,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:29,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:30:29,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:29,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284509830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:29,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:29,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:29,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808536726] [2021-06-12 15:30:29,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:29,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:29,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:29,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:29,192 INFO L87 Difference]: Start difference. First operand 3913 states and 10953 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:29,981 INFO L93 Difference]: Finished difference Result 5031 states and 13392 transitions. [2021-06-12 15:30:29,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:30:29,981 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:29,986 INFO L225 Difference]: With dead ends: 5031 [2021-06-12 15:30:29,987 INFO L226 Difference]: Without dead ends: 4761 [2021-06-12 15:30:29,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 716.0ms TimeCoverageRelationStatistics Valid=950, Invalid=3082, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:30:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-06-12 15:30:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3988. [2021-06-12 15:30:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 2.8036117381489842) internal successors, (11178), 3987 states have internal predecessors, (11178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11178 transitions. [2021-06-12 15:30:30,033 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11178 transitions. Word has length 130 [2021-06-12 15:30:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:30,033 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11178 transitions. [2021-06-12 15:30:30,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11178 transitions. [2021-06-12 15:30:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:30,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:30,036 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:30,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:30,236 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash -693622601, now seen corresponding path program 202 times [2021-06-12 15:30:30,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:30,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707953459] [2021-06-12 15:30:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:30,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:30,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707953459] [2021-06-12 15:30:30,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707953459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:30,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107693563] [2021-06-12 15:30:30,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:30,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:30,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:30,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:30,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107693563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:30,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:30,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:30,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139828741] [2021-06-12 15:30:30,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:30,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:30,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:30,633 INFO L87 Difference]: Start difference. First operand 3988 states and 11178 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:31,373 INFO L93 Difference]: Finished difference Result 5056 states and 13517 transitions. [2021-06-12 15:30:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:30:31,373 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:31,378 INFO L225 Difference]: With dead ends: 5056 [2021-06-12 15:30:31,378 INFO L226 Difference]: Without dead ends: 4786 [2021-06-12 15:30:31,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 676.6ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:30:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-12 15:30:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4063. [2021-06-12 15:30:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 4062 states have (on average 2.807237813884786) internal successors, (11403), 4062 states have internal predecessors, (11403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11403 transitions. [2021-06-12 15:30:31,425 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11403 transitions. Word has length 130 [2021-06-12 15:30:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:31,425 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11403 transitions. [2021-06-12 15:30:31,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11403 transitions. [2021-06-12 15:30:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:31,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:31,429 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:31,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 15:30:31,629 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:31,629 INFO L82 PathProgramCache]: Analyzing trace with hash -263869017, now seen corresponding path program 203 times [2021-06-12 15:30:31,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:31,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299984291] [2021-06-12 15:30:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:31,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:31,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299984291] [2021-06-12 15:30:31,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299984291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:31,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564373773] [2021-06-12 15:30:31,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:31,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:31,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:31,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:31,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:32,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564373773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:32,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:32,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:32,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990712099] [2021-06-12 15:30:32,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:32,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:32,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:32,027 INFO L87 Difference]: Start difference. First operand 4063 states and 11403 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:32,921 INFO L93 Difference]: Finished difference Result 5141 states and 13807 transitions. [2021-06-12 15:30:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:30:32,921 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:32,926 INFO L225 Difference]: With dead ends: 5141 [2021-06-12 15:30:32,926 INFO L226 Difference]: Without dead ends: 4871 [2021-06-12 15:30:32,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 824.0ms TimeCoverageRelationStatistics Valid=1235, Invalid=3321, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:30:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-06-12 15:30:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4138. [2021-06-12 15:30:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.8155668358714045) internal successors, (11648), 4137 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-06-12 15:30:32,977 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-06-12 15:30:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:32,977 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-06-12 15:30:32,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-06-12 15:30:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:32,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:32,981 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:33,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 15:30:33,182 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:33,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:33,182 INFO L82 PathProgramCache]: Analyzing trace with hash -321603147, now seen corresponding path program 204 times [2021-06-12 15:30:33,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:33,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089158086] [2021-06-12 15:30:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:33,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:33,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089158086] [2021-06-12 15:30:33,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089158086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:33,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789200226] [2021-06-12 15:30:33,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:33,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:33,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:33,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:33,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789200226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:33,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:33,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:33,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830421930] [2021-06-12 15:30:33,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:33,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:33,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:33,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:33,610 INFO L87 Difference]: Start difference. First operand 4138 states and 11648 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:34,376 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-06-12 15:30:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:30:34,376 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:34,382 INFO L225 Difference]: With dead ends: 5908 [2021-06-12 15:30:34,383 INFO L226 Difference]: Without dead ends: 5638 [2021-06-12 15:30:34,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 691.1ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:30:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-12 15:30:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-06-12 15:30:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 4317 states have (on average 2.8276580958999307) internal successors, (12207), 4317 states have internal predecessors, (12207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-06-12 15:30:34,447 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-06-12 15:30:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:34,447 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-06-12 15:30:34,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-06-12 15:30:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:34,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:34,451 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:34,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-12 15:30:34,651 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:34,652 INFO L82 PathProgramCache]: Analyzing trace with hash -299259897, now seen corresponding path program 205 times [2021-06-12 15:30:34,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:34,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734781154] [2021-06-12 15:30:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:34,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:34,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734781154] [2021-06-12 15:30:34,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734781154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:34,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193908993] [2021-06-12 15:30:34,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:34,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:34,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:35,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193908993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:35,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:35,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:35,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744807763] [2021-06-12 15:30:35,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:35,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:35,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:35,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:35,037 INFO L87 Difference]: Start difference. First operand 4318 states and 12207 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:35,999 INFO L93 Difference]: Finished difference Result 5395 states and 14681 transitions. [2021-06-12 15:30:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:30:35,999 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:30:35,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:36,005 INFO L225 Difference]: With dead ends: 5395 [2021-06-12 15:30:36,005 INFO L226 Difference]: Without dead ends: 4906 [2021-06-12 15:30:36,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 875.5ms TimeCoverageRelationStatistics Valid=1379, Invalid=3451, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:30:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2021-06-12 15:30:36,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 2913. [2021-06-12 15:30:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 2.739697802197802) internal successors, (7978), 2912 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 7978 transitions. [2021-06-12 15:30:36,045 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 7978 transitions. Word has length 130 [2021-06-12 15:30:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:36,045 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 7978 transitions. [2021-06-12 15:30:36,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 7978 transitions. [2021-06-12 15:30:36,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:36,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:36,048 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:36,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 15:30:36,248 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:36,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:36,249 INFO L82 PathProgramCache]: Analyzing trace with hash 750131032, now seen corresponding path program 206 times [2021-06-12 15:30:36,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:36,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285438080] [2021-06-12 15:30:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:36,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:36,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285438080] [2021-06-12 15:30:36,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285438080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:36,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280716465] [2021-06-12 15:30:36,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:36,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:36,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:36,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:36,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:36,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280716465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:36,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:36,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:36,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97977197] [2021-06-12 15:30:36,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:36,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:36,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:36,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:36,703 INFO L87 Difference]: Start difference. First operand 2913 states and 7978 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:37,228 INFO L93 Difference]: Finished difference Result 4331 states and 11017 transitions. [2021-06-12 15:30:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:30:37,229 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:37,232 INFO L225 Difference]: With dead ends: 4331 [2021-06-12 15:30:37,232 INFO L226 Difference]: Without dead ends: 4061 [2021-06-12 15:30:37,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=722, Invalid=2034, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:30:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-06-12 15:30:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 2988. [2021-06-12 15:30:37,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2987 states have (on average 2.7462336792768665) internal successors, (8203), 2987 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 8203 transitions. [2021-06-12 15:30:37,266 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 8203 transitions. Word has length 135 [2021-06-12 15:30:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:37,266 INFO L482 AbstractCegarLoop]: Abstraction has 2988 states and 8203 transitions. [2021-06-12 15:30:37,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 8203 transitions. [2021-06-12 15:30:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:37,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:37,268 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:37,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-12 15:30:37,469 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash 107756616, now seen corresponding path program 207 times [2021-06-12 15:30:37,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:37,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549284778] [2021-06-12 15:30:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:37,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:37,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549284778] [2021-06-12 15:30:37,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549284778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:37,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761886476] [2021-06-12 15:30:37,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:37,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:37,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:37,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:38,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761886476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:38,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:38,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:38,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198094627] [2021-06-12 15:30:38,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:38,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:38,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:38,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:38,018 INFO L87 Difference]: Start difference. First operand 2988 states and 8203 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:38,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:38,545 INFO L93 Difference]: Finished difference Result 4851 states and 12132 transitions. [2021-06-12 15:30:38,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:30:38,545 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:38,550 INFO L225 Difference]: With dead ends: 4851 [2021-06-12 15:30:38,550 INFO L226 Difference]: Without dead ends: 4581 [2021-06-12 15:30:38,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=780, Invalid=2300, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:30:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2021-06-12 15:30:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 3063. [2021-06-12 15:30:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 2.752449379490529) internal successors, (8428), 3062 states have internal predecessors, (8428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 8428 transitions. [2021-06-12 15:30:38,598 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 8428 transitions. Word has length 135 [2021-06-12 15:30:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:38,598 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 8428 transitions. [2021-06-12 15:30:38,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 8428 transitions. [2021-06-12 15:30:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:38,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:38,600 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:38,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:38,801 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash 61209686, now seen corresponding path program 208 times [2021-06-12 15:30:38,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:38,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962270285] [2021-06-12 15:30:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:39,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:39,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962270285] [2021-06-12 15:30:39,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962270285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:39,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030832767] [2021-06-12 15:30:39,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:39,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:39,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:39,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:39,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:39,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030832767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:39,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:39,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:39,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659392339] [2021-06-12 15:30:39,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:39,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:39,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:39,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:39,259 INFO L87 Difference]: Start difference. First operand 3063 states and 8428 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:39,774 INFO L93 Difference]: Finished difference Result 4881 states and 12267 transitions. [2021-06-12 15:30:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:30:39,774 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:39,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:39,778 INFO L225 Difference]: With dead ends: 4881 [2021-06-12 15:30:39,778 INFO L226 Difference]: Without dead ends: 4611 [2021-06-12 15:30:39,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=776, Invalid=2304, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:30:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-06-12 15:30:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 3138. [2021-06-12 15:30:39,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 2.7583678673892256) internal successors, (8653), 3137 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 8653 transitions. [2021-06-12 15:30:39,814 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 8653 transitions. Word has length 135 [2021-06-12 15:30:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:39,814 INFO L482 AbstractCegarLoop]: Abstraction has 3138 states and 8653 transitions. [2021-06-12 15:30:39,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 8653 transitions. [2021-06-12 15:30:39,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:39,816 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:39,816 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:40,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-12 15:30:40,016 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:40,017 INFO L82 PathProgramCache]: Analyzing trace with hash -857174714, now seen corresponding path program 209 times [2021-06-12 15:30:40,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:40,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875553823] [2021-06-12 15:30:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:40,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:40,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875553823] [2021-06-12 15:30:40,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875553823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:40,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415568763] [2021-06-12 15:30:40,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:40,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:40,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:40,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:40,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:40,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415568763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:40,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:40,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:40,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634028279] [2021-06-12 15:30:40,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:40,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:40,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:40,530 INFO L87 Difference]: Start difference. First operand 3138 states and 8653 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:41,123 INFO L93 Difference]: Finished difference Result 4906 states and 12392 transitions. [2021-06-12 15:30:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:30:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:41,128 INFO L225 Difference]: With dead ends: 4906 [2021-06-12 15:30:41,128 INFO L226 Difference]: Without dead ends: 4636 [2021-06-12 15:30:41,129 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=799, Invalid=2507, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:30:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-12 15:30:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3213. [2021-06-12 15:30:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.7640099626401) internal successors, (8878), 3212 states have internal predecessors, (8878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 8878 transitions. [2021-06-12 15:30:41,171 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 8878 transitions. Word has length 135 [2021-06-12 15:30:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:41,171 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 8878 transitions. [2021-06-12 15:30:41,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 8878 transitions. [2021-06-12 15:30:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:41,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:41,174 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:41,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:41,375 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:41,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:41,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1661101780, now seen corresponding path program 210 times [2021-06-12 15:30:41,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:41,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903523643] [2021-06-12 15:30:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:41,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:41,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903523643] [2021-06-12 15:30:41,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903523643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:41,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562489484] [2021-06-12 15:30:41,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:41,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:41,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:41,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:41,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:41,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562489484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:41,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:41,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:41,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420580099] [2021-06-12 15:30:41,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:41,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:41,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:41,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:41,845 INFO L87 Difference]: Start difference. First operand 3213 states and 8878 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:42,381 INFO L93 Difference]: Finished difference Result 4931 states and 12517 transitions. [2021-06-12 15:30:42,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:30:42,382 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:42,386 INFO L225 Difference]: With dead ends: 4931 [2021-06-12 15:30:42,386 INFO L226 Difference]: Without dead ends: 4661 [2021-06-12 15:30:42,387 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=809, Invalid=2497, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:30:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-12 15:30:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3288. [2021-06-12 15:30:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 2.7693945847277153) internal successors, (9103), 3287 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 9103 transitions. [2021-06-12 15:30:42,428 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 9103 transitions. Word has length 135 [2021-06-12 15:30:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:42,429 INFO L482 AbstractCegarLoop]: Abstraction has 3288 states and 9103 transitions. [2021-06-12 15:30:42,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 9103 transitions. [2021-06-12 15:30:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:42,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:42,431 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:42,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:42,632 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:42,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:42,632 INFO L82 PathProgramCache]: Analyzing trace with hash -534223932, now seen corresponding path program 211 times [2021-06-12 15:30:42,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:42,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892921920] [2021-06-12 15:30:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:42,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:42,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892921920] [2021-06-12 15:30:42,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892921920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:42,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633160963] [2021-06-12 15:30:42,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:42,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:42,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:43,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633160963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:43,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:43,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:43,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611663290] [2021-06-12 15:30:43,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:43,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:43,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:43,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:43,093 INFO L87 Difference]: Start difference. First operand 3288 states and 9103 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:43,737 INFO L93 Difference]: Finished difference Result 4956 states and 12642 transitions. [2021-06-12 15:30:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:30:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:43,741 INFO L225 Difference]: With dead ends: 4956 [2021-06-12 15:30:43,741 INFO L226 Difference]: Without dead ends: 4686 [2021-06-12 15:30:43,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 680.6ms TimeCoverageRelationStatistics Valid=834, Invalid=2706, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:30:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2021-06-12 15:30:43,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3363. [2021-06-12 15:30:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.774538964901844) internal successors, (9328), 3362 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9328 transitions. [2021-06-12 15:30:43,775 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9328 transitions. Word has length 135 [2021-06-12 15:30:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:43,776 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9328 transitions. [2021-06-12 15:30:43,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9328 transitions. [2021-06-12 15:30:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:43,778 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:43,778 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:43,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:43,978 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:43,979 INFO L82 PathProgramCache]: Analyzing trace with hash 975976146, now seen corresponding path program 212 times [2021-06-12 15:30:43,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:43,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266781875] [2021-06-12 15:30:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:44,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:44,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266781875] [2021-06-12 15:30:44,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266781875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:44,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65705876] [2021-06-12 15:30:44,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:44,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:44,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:44,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:44,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:44,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65705876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:44,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:44,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:44,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867730665] [2021-06-12 15:30:44,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:44,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:44,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:44,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:44,427 INFO L87 Difference]: Start difference. First operand 3363 states and 9328 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:44,958 INFO L93 Difference]: Finished difference Result 4981 states and 12767 transitions. [2021-06-12 15:30:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:30:44,958 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:44,962 INFO L225 Difference]: With dead ends: 4981 [2021-06-12 15:30:44,962 INFO L226 Difference]: Without dead ends: 4711 [2021-06-12 15:30:44,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 574.2ms TimeCoverageRelationStatistics Valid=858, Invalid=2682, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:30:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2021-06-12 15:30:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3438. [2021-06-12 15:30:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 2.779458830375327) internal successors, (9553), 3437 states have internal predecessors, (9553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 9553 transitions. [2021-06-12 15:30:44,997 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 9553 transitions. Word has length 135 [2021-06-12 15:30:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:44,997 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 9553 transitions. [2021-06-12 15:30:44,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 9553 transitions. [2021-06-12 15:30:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:44,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:44,999 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:45,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:45,200 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1615634370, now seen corresponding path program 213 times [2021-06-12 15:30:45,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:45,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170516450] [2021-06-12 15:30:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:45,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:45,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170516450] [2021-06-12 15:30:45,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170516450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:45,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756888774] [2021-06-12 15:30:45,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:45,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:45,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:45,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 15:30:45,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:45,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756888774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:45,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:45,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:45,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000380305] [2021-06-12 15:30:45,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:45,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:45,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:45,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:45,680 INFO L87 Difference]: Start difference. First operand 3438 states and 9553 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:46,341 INFO L93 Difference]: Finished difference Result 5006 states and 12892 transitions. [2021-06-12 15:30:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:30:46,341 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:46,346 INFO L225 Difference]: With dead ends: 5006 [2021-06-12 15:30:46,346 INFO L226 Difference]: Without dead ends: 4736 [2021-06-12 15:30:46,346 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 696.4ms TimeCoverageRelationStatistics Valid=864, Invalid=2918, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:30:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-12 15:30:46,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3513. [2021-06-12 15:30:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.7841685649202734) internal successors, (9778), 3512 states have internal predecessors, (9778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9778 transitions. [2021-06-12 15:30:46,389 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9778 transitions. Word has length 135 [2021-06-12 15:30:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:46,389 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9778 transitions. [2021-06-12 15:30:46,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9778 transitions. [2021-06-12 15:30:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:46,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:46,392 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:46,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 15:30:46,593 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:46,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:46,593 INFO L82 PathProgramCache]: Analyzing trace with hash 840715344, now seen corresponding path program 214 times [2021-06-12 15:30:46,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:46,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171008675] [2021-06-12 15:30:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:46,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:46,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171008675] [2021-06-12 15:30:46,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171008675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:46,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907958058] [2021-06-12 15:30:46,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:46,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:46,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:46,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:47,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907958058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:47,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:47,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:47,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520381560] [2021-06-12 15:30:47,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:47,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:47,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:47,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:47,048 INFO L87 Difference]: Start difference. First operand 3513 states and 9778 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:47,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:47,633 INFO L93 Difference]: Finished difference Result 5031 states and 13017 transitions. [2021-06-12 15:30:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:30:47,633 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:47,638 INFO L225 Difference]: With dead ends: 5031 [2021-06-12 15:30:47,638 INFO L226 Difference]: Without dead ends: 4761 [2021-06-12 15:30:47,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 600.5ms TimeCoverageRelationStatistics Valid=923, Invalid=2859, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:30:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-06-12 15:30:47,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3588. [2021-06-12 15:30:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.788681349316978) internal successors, (10003), 3587 states have internal predecessors, (10003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 10003 transitions. [2021-06-12 15:30:47,682 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 10003 transitions. Word has length 135 [2021-06-12 15:30:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:47,682 INFO L482 AbstractCegarLoop]: Abstraction has 3588 states and 10003 transitions. [2021-06-12 15:30:47,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 10003 transitions. [2021-06-12 15:30:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:47,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:47,685 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:47,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-12 15:30:47,886 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:47,886 INFO L82 PathProgramCache]: Analyzing trace with hash 386801984, now seen corresponding path program 215 times [2021-06-12 15:30:47,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:47,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236229442] [2021-06-12 15:30:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:48,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:48,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236229442] [2021-06-12 15:30:48,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236229442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:48,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202965471] [2021-06-12 15:30:48,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:48,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:48,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:48,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:48,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202965471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:48,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:48,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:48,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200259402] [2021-06-12 15:30:48,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:48,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:48,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:48,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:48,354 INFO L87 Difference]: Start difference. First operand 3588 states and 10003 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:49,169 INFO L93 Difference]: Finished difference Result 5056 states and 13142 transitions. [2021-06-12 15:30:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:30:49,170 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:49,174 INFO L225 Difference]: With dead ends: 5056 [2021-06-12 15:30:49,174 INFO L226 Difference]: Without dead ends: 4786 [2021-06-12 15:30:49,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 803.7ms TimeCoverageRelationStatistics Valid=952, Invalid=3080, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:30:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-12 15:30:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 3663. [2021-06-12 15:30:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.793009284543965) internal successors, (10228), 3662 states have internal predecessors, (10228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10228 transitions. [2021-06-12 15:30:49,221 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10228 transitions. Word has length 135 [2021-06-12 15:30:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:49,221 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10228 transitions. [2021-06-12 15:30:49,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10228 transitions. [2021-06-12 15:30:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:49,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:49,224 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:49,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-12 15:30:49,424 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:49,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1264813902, now seen corresponding path program 216 times [2021-06-12 15:30:49,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:49,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163797947] [2021-06-12 15:30:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:49,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:49,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163797947] [2021-06-12 15:30:49,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163797947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:49,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032542131] [2021-06-12 15:30:49,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:49,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:49,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:49,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:49,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:49,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032542131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:49,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:49,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:49,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660960551] [2021-06-12 15:30:49,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:49,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:49,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:49,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:49,853 INFO L87 Difference]: Start difference. First operand 3663 states and 10228 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:50,499 INFO L93 Difference]: Finished difference Result 5081 states and 13267 transitions. [2021-06-12 15:30:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:30:50,499 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:50,503 INFO L225 Difference]: With dead ends: 5081 [2021-06-12 15:30:50,503 INFO L226 Difference]: Without dead ends: 4811 [2021-06-12 15:30:50,504 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 629.1ms TimeCoverageRelationStatistics Valid=1004, Invalid=3028, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:30:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2021-06-12 15:30:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 3738. [2021-06-12 15:30:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.7971635001337973) internal successors, (10453), 3737 states have internal predecessors, (10453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10453 transitions. [2021-06-12 15:30:50,547 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10453 transitions. Word has length 135 [2021-06-12 15:30:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:50,547 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10453 transitions. [2021-06-12 15:30:50,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10453 transitions. [2021-06-12 15:30:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:50,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:50,550 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:50,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-12 15:30:50,751 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash 364759102, now seen corresponding path program 217 times [2021-06-12 15:30:50,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:50,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085314523] [2021-06-12 15:30:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:50,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:50,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085314523] [2021-06-12 15:30:50,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085314523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:50,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525500255] [2021-06-12 15:30:50,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:51,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:51,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:51,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525500255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:51,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:51,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:51,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925780786] [2021-06-12 15:30:51,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:51,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:51,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:51,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:51,184 INFO L87 Difference]: Start difference. First operand 3738 states and 10453 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:51,939 INFO L93 Difference]: Finished difference Result 5106 states and 13392 transitions. [2021-06-12 15:30:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:30:51,940 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:51,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:51,945 INFO L225 Difference]: With dead ends: 5106 [2021-06-12 15:30:51,945 INFO L226 Difference]: Without dead ends: 4836 [2021-06-12 15:30:51,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 750.7ms TimeCoverageRelationStatistics Valid=1035, Invalid=3255, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:30:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2021-06-12 15:30:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 3813. [2021-06-12 15:30:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.8011542497376705) internal successors, (10678), 3812 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10678 transitions. [2021-06-12 15:30:51,997 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10678 transitions. Word has length 135 [2021-06-12 15:30:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:51,997 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10678 transitions. [2021-06-12 15:30:51,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10678 transitions. [2021-06-12 15:30:52,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:52,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:52,000 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:52,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:52,201 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:52,201 INFO L82 PathProgramCache]: Analyzing trace with hash -64305204, now seen corresponding path program 218 times [2021-06-12 15:30:52,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:52,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805632560] [2021-06-12 15:30:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:52,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:52,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805632560] [2021-06-12 15:30:52,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805632560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:52,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667928867] [2021-06-12 15:30:52,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:52,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:52,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:52,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:52,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667928867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:52,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:52,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:52,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023221953] [2021-06-12 15:30:52,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:52,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:52,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:52,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:52,612 INFO L87 Difference]: Start difference. First operand 3813 states and 10678 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:53,256 INFO L93 Difference]: Finished difference Result 5131 states and 13517 transitions. [2021-06-12 15:30:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:30:53,257 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:53,261 INFO L225 Difference]: With dead ends: 5131 [2021-06-12 15:30:53,261 INFO L226 Difference]: Without dead ends: 4861 [2021-06-12 15:30:53,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 639.1ms TimeCoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:30:53,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-06-12 15:30:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 3888. [2021-06-12 15:30:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.804990995626447) internal successors, (10903), 3887 states have internal predecessors, (10903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10903 transitions. [2021-06-12 15:30:53,308 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10903 transitions. Word has length 135 [2021-06-12 15:30:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:53,309 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10903 transitions. [2021-06-12 15:30:53,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:53,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10903 transitions. [2021-06-12 15:30:53,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:53,312 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:53,312 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:53,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-12 15:30:53,513 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:53,513 INFO L82 PathProgramCache]: Analyzing trace with hash -750488388, now seen corresponding path program 219 times [2021-06-12 15:30:53,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:53,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158873340] [2021-06-12 15:30:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:53,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:53,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158873340] [2021-06-12 15:30:53,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158873340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:53,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371052071] [2021-06-12 15:30:53,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:53,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:53,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:30:53,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:53,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371052071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:53,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:53,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:53,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729358319] [2021-06-12 15:30:53,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:53,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:53,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:53,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:53,957 INFO L87 Difference]: Start difference. First operand 3888 states and 10903 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:54,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:54,806 INFO L93 Difference]: Finished difference Result 5156 states and 13642 transitions. [2021-06-12 15:30:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:30:54,807 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:54,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:54,812 INFO L225 Difference]: With dead ends: 5156 [2021-06-12 15:30:54,812 INFO L226 Difference]: Without dead ends: 4886 [2021-06-12 15:30:54,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 829.2ms TimeCoverageRelationStatistics Valid=1068, Invalid=3488, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:30:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2021-06-12 15:30:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 3963. [2021-06-12 15:30:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.8086824835941444) internal successors, (11128), 3962 states have internal predecessors, (11128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 11128 transitions. [2021-06-12 15:30:54,864 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 11128 transitions. Word has length 135 [2021-06-12 15:30:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:54,865 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 11128 transitions. [2021-06-12 15:30:54,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 11128 transitions. [2021-06-12 15:30:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:54,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:54,868 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:55,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:55,069 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:55,069 INFO L82 PathProgramCache]: Analyzing trace with hash -835523126, now seen corresponding path program 220 times [2021-06-12 15:30:55,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:55,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013495122] [2021-06-12 15:30:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:55,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:55,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013495122] [2021-06-12 15:30:55,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013495122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:55,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370366279] [2021-06-12 15:30:55,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:55,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:55,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:55,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:55,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:55,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370366279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:55,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:55,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:55,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223233937] [2021-06-12 15:30:55,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:55,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:55,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:55,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:55,516 INFO L87 Difference]: Start difference. First operand 3963 states and 11128 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:56,195 INFO L93 Difference]: Finished difference Result 5181 states and 13767 transitions. [2021-06-12 15:30:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:30:56,196 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:56,201 INFO L225 Difference]: With dead ends: 5181 [2021-06-12 15:30:56,201 INFO L226 Difference]: Without dead ends: 4911 [2021-06-12 15:30:56,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=1214, Invalid=3342, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:30:56,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-06-12 15:30:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4038. [2021-06-12 15:30:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.812236809512014) internal successors, (11353), 4037 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11353 transitions. [2021-06-12 15:30:56,256 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11353 transitions. Word has length 135 [2021-06-12 15:30:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:56,256 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11353 transitions. [2021-06-12 15:30:56,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11353 transitions. [2021-06-12 15:30:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:56,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:56,260 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:56,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 15:30:56,460 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash -903674182, now seen corresponding path program 221 times [2021-06-12 15:30:56,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:56,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61625291] [2021-06-12 15:30:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:56,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:56,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61625291] [2021-06-12 15:30:56,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61625291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:56,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888095875] [2021-06-12 15:30:56,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:56,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:56,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:56,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888095875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:56,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:56,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:56,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616384598] [2021-06-12 15:30:56,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:56,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:56,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:56,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:56,897 INFO L87 Difference]: Start difference. First operand 4038 states and 11353 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:57,764 INFO L93 Difference]: Finished difference Result 5206 states and 13892 transitions. [2021-06-12 15:30:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:30:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:57,770 INFO L225 Difference]: With dead ends: 5206 [2021-06-12 15:30:57,770 INFO L226 Difference]: Without dead ends: 4936 [2021-06-12 15:30:57,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 848.6ms TimeCoverageRelationStatistics Valid=1249, Invalid=3581, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:30:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2021-06-12 15:30:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4113. [2021-06-12 15:30:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.815661478599222) internal successors, (11578), 4112 states have internal predecessors, (11578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11578 transitions. [2021-06-12 15:30:57,817 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11578 transitions. Word has length 135 [2021-06-12 15:30:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:57,818 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11578 transitions. [2021-06-12 15:30:57,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11578 transitions. [2021-06-12 15:30:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:57,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:57,821 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:58,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:58,022 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2094324040, now seen corresponding path program 222 times [2021-06-12 15:30:58,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:58,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523457043] [2021-06-12 15:30:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:58,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:58,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523457043] [2021-06-12 15:30:58,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523457043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:58,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032497179] [2021-06-12 15:30:58,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:58,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:58,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:58,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:30:58,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:58,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032497179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:58,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:58,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:58,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791406393] [2021-06-12 15:30:58,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:58,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:58,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:58,466 INFO L87 Difference]: Start difference. First operand 4113 states and 11578 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:59,172 INFO L93 Difference]: Finished difference Result 5231 states and 14017 transitions. [2021-06-12 15:30:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:30:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:30:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:59,177 INFO L225 Difference]: With dead ends: 5231 [2021-06-12 15:30:59,177 INFO L226 Difference]: Without dead ends: 4961 [2021-06-12 15:30:59,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 690.6ms TimeCoverageRelationStatistics Valid=1343, Invalid=3487, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:30:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-12 15:30:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 4188. [2021-06-12 15:30:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.818963458323382) internal successors, (11803), 4187 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11803 transitions. [2021-06-12 15:30:59,220 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11803 transitions. Word has length 135 [2021-06-12 15:30:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:59,220 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11803 transitions. [2021-06-12 15:30:59,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11803 transitions. [2021-06-12 15:30:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:59,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:59,224 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:30:59,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:59,424 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1770889672, now seen corresponding path program 223 times [2021-06-12 15:30:59,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:59,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969165853] [2021-06-12 15:30:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:59,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:59,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969165853] [2021-06-12 15:30:59,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969165853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:59,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84135099] [2021-06-12 15:30:59,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:59,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:59,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:30:59,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84135099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:59,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:59,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:59,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312175532] [2021-06-12 15:30:59,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:59,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:59,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:59,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:59,854 INFO L87 Difference]: Start difference. First operand 4188 states and 11803 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:00,755 INFO L93 Difference]: Finished difference Result 5316 states and 14307 transitions. [2021-06-12 15:31:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:31:00,755 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:31:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:00,760 INFO L225 Difference]: With dead ends: 5316 [2021-06-12 15:31:00,760 INFO L226 Difference]: Without dead ends: 5046 [2021-06-12 15:31:00,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 873.1ms TimeCoverageRelationStatistics Valid=1380, Invalid=3732, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:31:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5046 states. [2021-06-12 15:31:00,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5046 to 4263. [2021-06-12 15:31:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.8268418582824966) internal successors, (12048), 4262 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 12048 transitions. [2021-06-12 15:31:00,813 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 12048 transitions. Word has length 135 [2021-06-12 15:31:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:00,813 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 12048 transitions. [2021-06-12 15:31:00,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 12048 transitions. [2021-06-12 15:31:00,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:31:00,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:00,817 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:01,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:01,017 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:01,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:01,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1828623802, now seen corresponding path program 224 times [2021-06-12 15:31:01,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:01,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051639423] [2021-06-12 15:31:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:01,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:01,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051639423] [2021-06-12 15:31:01,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051639423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:01,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245598636] [2021-06-12 15:31:01,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:01,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:01,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:01,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245598636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:01,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:01,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:31:01,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836963843] [2021-06-12 15:31:01,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:31:01,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:31:01,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:31:01,418 INFO L87 Difference]: Start difference. First operand 4263 states and 12048 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:02,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:02,187 INFO L93 Difference]: Finished difference Result 6058 states and 16431 transitions. [2021-06-12 15:31:02,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:31:02,187 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:31:02,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:02,193 INFO L225 Difference]: With dead ends: 6058 [2021-06-12 15:31:02,193 INFO L226 Difference]: Without dead ends: 5788 [2021-06-12 15:31:02,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 726.1ms TimeCoverageRelationStatistics Valid=1489, Invalid=3623, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:31:02,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5788 states. [2021-06-12 15:31:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5788 to 4443. [2021-06-12 15:31:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4442 states have (on average 2.8381359747861326) internal successors, (12607), 4442 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 12607 transitions. [2021-06-12 15:31:02,246 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 12607 transitions. Word has length 135 [2021-06-12 15:31:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:02,246 INFO L482 AbstractCegarLoop]: Abstraction has 4443 states and 12607 transitions. [2021-06-12 15:31:02,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 12607 transitions. [2021-06-12 15:31:02,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:31:02,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:02,250 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:02,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:02,450 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:02,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1806280552, now seen corresponding path program 225 times [2021-06-12 15:31:02,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:02,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761423708] [2021-06-12 15:31:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:02,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:02,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761423708] [2021-06-12 15:31:02,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761423708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:02,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916286971] [2021-06-12 15:31:02,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:02,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:31:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:02,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:02,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:02,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916286971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:02,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:02,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:31:02,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337535345] [2021-06-12 15:31:02,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:02,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:02,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:02,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:02,866 INFO L87 Difference]: Start difference. First operand 4443 states and 12607 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:03,847 INFO L93 Difference]: Finished difference Result 5926 states and 16096 transitions. [2021-06-12 15:31:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:31:03,848 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:31:03,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:03,853 INFO L225 Difference]: With dead ends: 5926 [2021-06-12 15:31:03,853 INFO L226 Difference]: Without dead ends: 5351 [2021-06-12 15:31:03,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 925.9ms TimeCoverageRelationStatistics Valid=1436, Invalid=4416, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:31:03,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-12 15:31:03,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4478. [2021-06-12 15:31:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.832923832923833) internal successors, (12683), 4477 states have internal predecessors, (12683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12683 transitions. [2021-06-12 15:31:03,899 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12683 transitions. Word has length 135 [2021-06-12 15:31:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:03,899 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12683 transitions. [2021-06-12 15:31:03,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:03,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12683 transitions. [2021-06-12 15:31:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:03,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:03,903 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:04,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-12 15:31:04,109 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:04,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:04,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1580375444, now seen corresponding path program 226 times [2021-06-12 15:31:04,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:04,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079586394] [2021-06-12 15:31:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:04,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:04,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079586394] [2021-06-12 15:31:04,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079586394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:04,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801127442] [2021-06-12 15:31:04,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:04,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:04,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:04,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:04,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:04,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801127442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:04,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:04,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2021-06-12 15:31:04,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843712760] [2021-06-12 15:31:04,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:31:04,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:04,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:31:04,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:31:04,622 INFO L87 Difference]: Start difference. First operand 4478 states and 12683 transitions. Second operand has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:05,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:05,146 INFO L93 Difference]: Finished difference Result 5668 states and 15383 transitions. [2021-06-12 15:31:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:31:05,146 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:05,151 INFO L225 Difference]: With dead ends: 5668 [2021-06-12 15:31:05,151 INFO L226 Difference]: Without dead ends: 5334 [2021-06-12 15:31:05,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 627.7ms TimeCoverageRelationStatistics Valid=926, Invalid=2496, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:31:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-06-12 15:31:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4563. [2021-06-12 15:31:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.817404647084612) internal successors, (12853), 4562 states have internal predecessors, (12853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12853 transitions. [2021-06-12 15:31:05,198 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12853 transitions. Word has length 140 [2021-06-12 15:31:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:05,199 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12853 transitions. [2021-06-12 15:31:05,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12853 transitions. [2021-06-12 15:31:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:05,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:05,202 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:05,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-12 15:31:05,403 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:05,403 INFO L82 PathProgramCache]: Analyzing trace with hash 683281208, now seen corresponding path program 227 times [2021-06-12 15:31:05,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:05,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750197090] [2021-06-12 15:31:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:05,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:05,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750197090] [2021-06-12 15:31:05,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750197090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:05,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589250384] [2021-06-12 15:31:05,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:05,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:05,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:05,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589250384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:05,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:05,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:05,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711625109] [2021-06-12 15:31:05,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:05,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:05,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:05,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:05,902 INFO L87 Difference]: Start difference. First operand 4563 states and 12853 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:06,320 INFO L93 Difference]: Finished difference Result 6561 states and 16977 transitions. [2021-06-12 15:31:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:31:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:06,327 INFO L225 Difference]: With dead ends: 6561 [2021-06-12 15:31:06,327 INFO L226 Difference]: Without dead ends: 6291 [2021-06-12 15:31:06,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=767, Invalid=1989, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:31:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2021-06-12 15:31:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 4578. [2021-06-12 15:31:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:06,380 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:06,380 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:06,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:06,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:06,384 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:06,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 15:31:06,585 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:06,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1770339288, now seen corresponding path program 228 times [2021-06-12 15:31:06,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:06,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089458071] [2021-06-12 15:31:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:06,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:06,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089458071] [2021-06-12 15:31:06,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089458071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:06,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091605426] [2021-06-12 15:31:06,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:06,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:06,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:06,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:07,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091605426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:07,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:07,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:07,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818366120] [2021-06-12 15:31:07,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:07,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:07,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:07,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:07,175 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:07,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:07,680 INFO L93 Difference]: Finished difference Result 6446 states and 16747 transitions. [2021-06-12 15:31:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:31:07,681 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:07,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:07,687 INFO L225 Difference]: With dead ends: 6446 [2021-06-12 15:31:07,687 INFO L226 Difference]: Without dead ends: 6176 [2021-06-12 15:31:07,688 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 621.7ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:31:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-06-12 15:31:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 4578. [2021-06-12 15:31:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:07,742 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:07,742 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:07,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:07,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:07,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:07,746 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:07,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:07,947 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash -888780106, now seen corresponding path program 229 times [2021-06-12 15:31:07,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:07,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620204448] [2021-06-12 15:31:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:08,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:08,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620204448] [2021-06-12 15:31:08,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620204448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:08,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323582548] [2021-06-12 15:31:08,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:08,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:08,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:08,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323582548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:08,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:08,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:08,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517843355] [2021-06-12 15:31:08,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:08,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:08,448 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:08,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:08,914 INFO L93 Difference]: Finished difference Result 6421 states and 16697 transitions. [2021-06-12 15:31:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:31:08,914 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:08,922 INFO L225 Difference]: With dead ends: 6421 [2021-06-12 15:31:08,922 INFO L226 Difference]: Without dead ends: 6151 [2021-06-12 15:31:08,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 569.9ms TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:31:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-06-12 15:31:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 4578. [2021-06-12 15:31:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:08,979 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:08,979 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:08,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:08,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:08,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:08,983 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:09,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-12 15:31:09,184 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:09,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1531154522, now seen corresponding path program 230 times [2021-06-12 15:31:09,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:09,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307080609] [2021-06-12 15:31:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:09,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:09,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307080609] [2021-06-12 15:31:09,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307080609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:09,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690061615] [2021-06-12 15:31:09,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:09,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:09,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:09,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:09,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690061615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:09,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:09,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:09,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523391406] [2021-06-12 15:31:09,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:09,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:09,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:09,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:09,709 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:10,279 INFO L93 Difference]: Finished difference Result 6371 states and 16597 transitions. [2021-06-12 15:31:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:31:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:10,285 INFO L225 Difference]: With dead ends: 6371 [2021-06-12 15:31:10,285 INFO L226 Difference]: Without dead ends: 6101 [2021-06-12 15:31:10,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=850, Invalid=2572, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:31:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2021-06-12 15:31:10,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 4578. [2021-06-12 15:31:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:10,338 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:10,338 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:10,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:10,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:10,342 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:10,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:10,543 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:10,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1577701452, now seen corresponding path program 231 times [2021-06-12 15:31:10,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:10,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142831123] [2021-06-12 15:31:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:10,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:10,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142831123] [2021-06-12 15:31:10,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142831123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:10,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664634519] [2021-06-12 15:31:10,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:10,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:10,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 15:31:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:11,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664634519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:11,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:11,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:11,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909698435] [2021-06-12 15:31:11,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:11,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:11,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:11,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:11,017 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:11,539 INFO L93 Difference]: Finished difference Result 6321 states and 16497 transitions. [2021-06-12 15:31:11,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:31:11,539 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:11,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:11,545 INFO L225 Difference]: With dead ends: 6321 [2021-06-12 15:31:11,545 INFO L226 Difference]: Without dead ends: 6051 [2021-06-12 15:31:11,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 592.0ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:31:11,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-06-12 15:31:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 4578. [2021-06-12 15:31:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:11,596 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:11,596 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:11,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:11,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:11,600 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:11,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 15:31:11,800 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1798881444, now seen corresponding path program 232 times [2021-06-12 15:31:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251080502] [2021-06-12 15:31:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:12,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:12,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251080502] [2021-06-12 15:31:12,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251080502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:12,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84022121] [2021-06-12 15:31:12,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:12,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:12,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:12,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:12,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:12,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84022121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:12,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:12,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:12,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971443057] [2021-06-12 15:31:12,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:12,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:12,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:12,287 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:12,916 INFO L93 Difference]: Finished difference Result 6271 states and 16397 transitions. [2021-06-12 15:31:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:31:12,917 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:12,921 INFO L225 Difference]: With dead ends: 6271 [2021-06-12 15:31:12,921 INFO L226 Difference]: Without dead ends: 6001 [2021-06-12 15:31:12,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=876, Invalid=2784, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:31:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2021-06-12 15:31:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 4578. [2021-06-12 15:31:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:12,971 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:12,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:12,971 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:12,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:12,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:12,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:12,975 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:13,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:13,175 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:13,176 INFO L82 PathProgramCache]: Analyzing trace with hash 22190642, now seen corresponding path program 233 times [2021-06-12 15:31:13,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:13,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710117957] [2021-06-12 15:31:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:13,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:13,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710117957] [2021-06-12 15:31:13,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710117957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:13,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894042297] [2021-06-12 15:31:13,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:13,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:13,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:13,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:13,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:13,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894042297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:13,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:13,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:13,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289826292] [2021-06-12 15:31:13,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:13,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:13,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:13,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:13,628 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:14,166 INFO L93 Difference]: Finished difference Result 6221 states and 16297 transitions. [2021-06-12 15:31:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:31:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:14,172 INFO L225 Difference]: With dead ends: 6221 [2021-06-12 15:31:14,172 INFO L226 Difference]: Without dead ends: 5951 [2021-06-12 15:31:14,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 586.1ms TimeCoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:31:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-06-12 15:31:14,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4578. [2021-06-12 15:31:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:14,226 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:14,226 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:14,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:14,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:14,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:14,230 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:14,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:14,431 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:14,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2121832226, now seen corresponding path program 234 times [2021-06-12 15:31:14,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:14,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753863916] [2021-06-12 15:31:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:14,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:14,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753863916] [2021-06-12 15:31:14,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753863916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:14,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858569481] [2021-06-12 15:31:14,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:14,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:14,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:14,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:14,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:14,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858569481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:14,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:14,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:14,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050388974] [2021-06-12 15:31:14,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:14,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:14,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:14,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:14,951 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:15,631 INFO L93 Difference]: Finished difference Result 6171 states and 16197 transitions. [2021-06-12 15:31:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:31:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:15,638 INFO L225 Difference]: With dead ends: 6171 [2021-06-12 15:31:15,638 INFO L226 Difference]: Without dead ends: 5901 [2021-06-12 15:31:15,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 722.4ms TimeCoverageRelationStatistics Valid=918, Invalid=2988, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:31:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-12 15:31:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 4578. [2021-06-12 15:31:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:15,692 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:15,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:15,692 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:15,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:15,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:15,696 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:15,696 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:15,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:15,896 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:15,896 INFO L82 PathProgramCache]: Analyzing trace with hash -662934992, now seen corresponding path program 235 times [2021-06-12 15:31:15,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:15,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390758134] [2021-06-12 15:31:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:16,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390758134] [2021-06-12 15:31:16,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390758134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:16,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108691589] [2021-06-12 15:31:16,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:16,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:16,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108691589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:16,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:16,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:16,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168580838] [2021-06-12 15:31:16,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:16,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:16,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:16,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:16,361 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:16,958 INFO L93 Difference]: Finished difference Result 6121 states and 16097 transitions. [2021-06-12 15:31:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:31:16,958 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:16,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:16,964 INFO L225 Difference]: With dead ends: 6121 [2021-06-12 15:31:16,964 INFO L226 Difference]: Without dead ends: 5851 [2021-06-12 15:31:16,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 634.9ms TimeCoverageRelationStatistics Valid=871, Invalid=2789, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:31:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2021-06-12 15:31:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 4578. [2021-06-12 15:31:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:17,016 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:17,016 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:17,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:17,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:17,020 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:17,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-12 15:31:17,221 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash -23276768, now seen corresponding path program 236 times [2021-06-12 15:31:17,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:17,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590270976] [2021-06-12 15:31:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:17,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:17,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590270976] [2021-06-12 15:31:17,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590270976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:17,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344768572] [2021-06-12 15:31:17,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:17,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:17,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:17,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:17,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344768572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:17,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:17,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:17,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597588705] [2021-06-12 15:31:17,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:17,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:17,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:17,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:17,707 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:18,430 INFO L93 Difference]: Finished difference Result 6071 states and 15997 transitions. [2021-06-12 15:31:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:31:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:18,436 INFO L225 Difference]: With dead ends: 6071 [2021-06-12 15:31:18,436 INFO L226 Difference]: Without dead ends: 5801 [2021-06-12 15:31:18,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=976, Invalid=3184, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:31:18,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-12 15:31:18,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4578. [2021-06-12 15:31:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:18,490 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:18,490 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:18,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:18,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:18,494 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:18,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-12 15:31:18,695 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash -798195794, now seen corresponding path program 237 times [2021-06-12 15:31:18,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:18,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848635913] [2021-06-12 15:31:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:18,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:18,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848635913] [2021-06-12 15:31:18,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848635913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:18,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12838108] [2021-06-12 15:31:18,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:18,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:18,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:18,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:31:18,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:19,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12838108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:19,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:19,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:19,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019603724] [2021-06-12 15:31:19,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:19,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:19,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:19,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:19,159 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:19,788 INFO L93 Difference]: Finished difference Result 6021 states and 15897 transitions. [2021-06-12 15:31:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:31:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:19,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:19,794 INFO L225 Difference]: With dead ends: 6021 [2021-06-12 15:31:19,794 INFO L226 Difference]: Without dead ends: 5751 [2021-06-12 15:31:19,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 668.3ms TimeCoverageRelationStatistics Valid=937, Invalid=2969, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:31:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-06-12 15:31:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 4578. [2021-06-12 15:31:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:19,847 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:19,847 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:19,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:19,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:19,851 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:20,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-12 15:31:20,051 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1252109154, now seen corresponding path program 238 times [2021-06-12 15:31:20,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:20,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565019671] [2021-06-12 15:31:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:20,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:20,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565019671] [2021-06-12 15:31:20,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565019671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:20,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214489809] [2021-06-12 15:31:20,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:20,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:20,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:20,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:20,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:20,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214489809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:20,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:20,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:20,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965636827] [2021-06-12 15:31:20,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:20,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:20,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:20,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:20,520 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:21,321 INFO L93 Difference]: Finished difference Result 5971 states and 15797 transitions. [2021-06-12 15:31:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:31:21,321 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:21,327 INFO L225 Difference]: With dead ends: 5971 [2021-06-12 15:31:21,327 INFO L226 Difference]: Without dead ends: 5701 [2021-06-12 15:31:21,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 814.9ms TimeCoverageRelationStatistics Valid=1050, Invalid=3372, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:31:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2021-06-12 15:31:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 4578. [2021-06-12 15:31:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:21,378 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:21,378 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:21,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:21,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:21,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:21,382 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:21,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-12 15:31:21,583 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:21,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:21,583 INFO L82 PathProgramCache]: Analyzing trace with hash -374097236, now seen corresponding path program 239 times [2021-06-12 15:31:21,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:21,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516318848] [2021-06-12 15:31:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:21,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:21,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516318848] [2021-06-12 15:31:21,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516318848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:21,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912605647] [2021-06-12 15:31:21,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:21,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:21,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:21,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:21,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:22,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912605647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:22,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:22,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:22,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057290353] [2021-06-12 15:31:22,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:22,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:22,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:22,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:22,025 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:22,692 INFO L93 Difference]: Finished difference Result 5921 states and 15697 transitions. [2021-06-12 15:31:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:31:22,692 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:22,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:22,697 INFO L225 Difference]: With dead ends: 5921 [2021-06-12 15:31:22,697 INFO L226 Difference]: Without dead ends: 5651 [2021-06-12 15:31:22,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 663.2ms TimeCoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:31:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-12 15:31:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4578. [2021-06-12 15:31:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:22,745 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:22,745 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:22,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:22,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:22,749 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:22,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-12 15:31:22,950 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1274152036, now seen corresponding path program 240 times [2021-06-12 15:31:22,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:22,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530155082] [2021-06-12 15:31:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:23,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:23,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530155082] [2021-06-12 15:31:23,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530155082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:23,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144468194] [2021-06-12 15:31:23,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:23,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:23,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:23,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:31:23,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:23,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144468194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:23,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:23,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:23,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013800587] [2021-06-12 15:31:23,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:23,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:23,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:23,412 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:24,202 INFO L93 Difference]: Finished difference Result 5871 states and 15597 transitions. [2021-06-12 15:31:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:31:24,202 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:24,207 INFO L225 Difference]: With dead ends: 5871 [2021-06-12 15:31:24,207 INFO L226 Difference]: Without dead ends: 5601 [2021-06-12 15:31:24,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 779.6ms TimeCoverageRelationStatistics Valid=999, Invalid=3423, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:31:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-12 15:31:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4578. [2021-06-12 15:31:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:24,254 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:24,254 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:24,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:24,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:24,257 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:24,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:24,458 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1703216342, now seen corresponding path program 241 times [2021-06-12 15:31:24,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:24,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992080529] [2021-06-12 15:31:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:24,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:24,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992080529] [2021-06-12 15:31:24,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992080529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:24,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004107834] [2021-06-12 15:31:24,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:24,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:24,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:24,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004107834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:24,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:24,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:24,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878567885] [2021-06-12 15:31:24,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:24,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:24,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:24,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:24,885 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:25,629 INFO L93 Difference]: Finished difference Result 5821 states and 15497 transitions. [2021-06-12 15:31:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:31:25,630 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:25,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:25,634 INFO L225 Difference]: With dead ends: 5821 [2021-06-12 15:31:25,634 INFO L226 Difference]: Without dead ends: 5551 [2021-06-12 15:31:25,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 711.9ms TimeCoverageRelationStatistics Valid=1117, Invalid=3305, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:31:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-12 15:31:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4578. [2021-06-12 15:31:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:25,681 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:25,681 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:25,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:25,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:25,685 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:25,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-12 15:31:25,889 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1905567770, now seen corresponding path program 242 times [2021-06-12 15:31:25,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:25,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142742168] [2021-06-12 15:31:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:26,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:26,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142742168] [2021-06-12 15:31:26,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142742168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:26,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247883853] [2021-06-12 15:31:26,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:26,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:26,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:26,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:26,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247883853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:26,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:26,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:26,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012014857] [2021-06-12 15:31:26,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:26,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:26,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:26,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:26,346 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:27,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:27,246 INFO L93 Difference]: Finished difference Result 5771 states and 15397 transitions. [2021-06-12 15:31:27,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:31:27,246 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:27,251 INFO L225 Difference]: With dead ends: 5771 [2021-06-12 15:31:27,251 INFO L226 Difference]: Without dead ends: 5501 [2021-06-12 15:31:27,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 874.3ms TimeCoverageRelationStatistics Valid=1246, Invalid=3724, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:31:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-12 15:31:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4578. [2021-06-12 15:31:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:27,300 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:27,300 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:27,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:27,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:27,304 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:27,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:27,505 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1820533032, now seen corresponding path program 243 times [2021-06-12 15:31:27,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:27,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53025077] [2021-06-12 15:31:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:27,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:27,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53025077] [2021-06-12 15:31:27,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53025077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:27,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038197499] [2021-06-12 15:31:27,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:27,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:27,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:27,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:31:27,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:27,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038197499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:27,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:27,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:27,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535227330] [2021-06-12 15:31:27,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:27,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:27,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:27,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:27,945 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:28,722 INFO L93 Difference]: Finished difference Result 5721 states and 15297 transitions. [2021-06-12 15:31:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:31:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:28,728 INFO L225 Difference]: With dead ends: 5721 [2021-06-12 15:31:28,729 INFO L226 Difference]: Without dead ends: 5451 [2021-06-12 15:31:28,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 735.5ms TimeCoverageRelationStatistics Valid=1231, Invalid=3461, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:31:28,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-12 15:31:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4578. [2021-06-12 15:31:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:28,793 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:28,793 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:28,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:28,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:28,797 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:28,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:28,997 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:28,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1752381976, now seen corresponding path program 244 times [2021-06-12 15:31:28,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:28,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192432964] [2021-06-12 15:31:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:29,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:29,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192432964] [2021-06-12 15:31:29,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192432964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:29,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791318672] [2021-06-12 15:31:29,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:29,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:29,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:29,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791318672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:29,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:29,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:29,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138374078] [2021-06-12 15:31:29,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:29,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:29,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:29,436 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:30,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:30,376 INFO L93 Difference]: Finished difference Result 5671 states and 15197 transitions. [2021-06-12 15:31:30,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:31:30,376 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:30,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:30,382 INFO L225 Difference]: With dead ends: 5671 [2021-06-12 15:31:30,382 INFO L226 Difference]: Without dead ends: 5401 [2021-06-12 15:31:30,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 916.8ms TimeCoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:31:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-12 15:31:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4578. [2021-06-12 15:31:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:30,449 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:30,449 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:30,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:30,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:30,454 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:30,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:30,654 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:30,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:30,654 INFO L82 PathProgramCache]: Analyzing trace with hash 455412902, now seen corresponding path program 245 times [2021-06-12 15:31:30,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:30,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055655502] [2021-06-12 15:31:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:30,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:30,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055655502] [2021-06-12 15:31:30,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055655502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:30,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786445647] [2021-06-12 15:31:30,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:30,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:30,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:30,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:30,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:31,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786445647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:31,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:31,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:31,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624322197] [2021-06-12 15:31:31,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:31,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:31,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:31,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:31,073 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:31,859 INFO L93 Difference]: Finished difference Result 5621 states and 15097 transitions. [2021-06-12 15:31:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:31:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:31,866 INFO L225 Difference]: With dead ends: 5621 [2021-06-12 15:31:31,866 INFO L226 Difference]: Without dead ends: 5351 [2021-06-12 15:31:31,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 755.8ms TimeCoverageRelationStatistics Valid=1361, Invalid=3609, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:31:31,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-12 15:31:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4578. [2021-06-12 15:31:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-12 15:31:31,939 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-12 15:31:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:31,940 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-12 15:31:31,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-12 15:31:31,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:31,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:31,943 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:32,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:32,143 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:32,144 INFO L82 PathProgramCache]: Analyzing trace with hash 885166486, now seen corresponding path program 246 times [2021-06-12 15:31:32,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:32,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296375289] [2021-06-12 15:31:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:32,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:32,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296375289] [2021-06-12 15:31:32,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296375289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:32,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781758300] [2021-06-12 15:31:32,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:32,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:32,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:32,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:31:32,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:32,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781758300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:32,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:32,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:32,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659677412] [2021-06-12 15:31:32,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:32,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:32,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:32,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:32,590 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:33,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:33,515 INFO L93 Difference]: Finished difference Result 5631 states and 15147 transitions. [2021-06-12 15:31:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:31:33,516 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:33,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:33,521 INFO L225 Difference]: With dead ends: 5631 [2021-06-12 15:31:33,521 INFO L226 Difference]: Without dead ends: 5361 [2021-06-12 15:31:33,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 897.3ms TimeCoverageRelationStatistics Valid=1284, Invalid=3972, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:31:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-12 15:31:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4578. [2021-06-12 15:31:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.815818221542495) internal successors, (12888), 4577 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12888 transitions. [2021-06-12 15:31:33,586 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12888 transitions. Word has length 140 [2021-06-12 15:31:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:33,586 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12888 transitions. [2021-06-12 15:31:33,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12888 transitions. [2021-06-12 15:31:33,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:33,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:33,589 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:33,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-12 15:31:33,793 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:33,793 INFO L82 PathProgramCache]: Analyzing trace with hash 827432356, now seen corresponding path program 247 times [2021-06-12 15:31:33,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:33,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076517997] [2021-06-12 15:31:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:33,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:33,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076517997] [2021-06-12 15:31:33,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076517997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:33,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019405638] [2021-06-12 15:31:33,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:34,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019405638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:34,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:34,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:34,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622354253] [2021-06-12 15:31:34,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:34,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:34,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:34,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:34,209 INFO L87 Difference]: Start difference. First operand 4578 states and 12888 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:35,039 INFO L93 Difference]: Finished difference Result 6398 states and 17321 transitions. [2021-06-12 15:31:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:31:35,040 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:35,047 INFO L225 Difference]: With dead ends: 6398 [2021-06-12 15:31:35,047 INFO L226 Difference]: Without dead ends: 6128 [2021-06-12 15:31:35,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=1508, Invalid=3748, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:31:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-06-12 15:31:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 4758. [2021-06-12 15:31:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 4757 states have (on average 2.8267815850325837) internal successors, (13447), 4757 states have internal predecessors, (13447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 13447 transitions. [2021-06-12 15:31:35,103 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 13447 transitions. Word has length 140 [2021-06-12 15:31:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:35,103 INFO L482 AbstractCegarLoop]: Abstraction has 4758 states and 13447 transitions. [2021-06-12 15:31:35,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 13447 transitions. [2021-06-12 15:31:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:35,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:35,125 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:35,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-12 15:31:35,327 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:35,328 INFO L82 PathProgramCache]: Analyzing trace with hash 849775606, now seen corresponding path program 248 times [2021-06-12 15:31:35,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:35,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55833889] [2021-06-12 15:31:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:35,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:35,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55833889] [2021-06-12 15:31:35,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55833889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:35,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175264686] [2021-06-12 15:31:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:35,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:35,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:35,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:35,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:35,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175264686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:35,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:35,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:35,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486948244] [2021-06-12 15:31:35,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:35,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:35,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:35,774 INFO L87 Difference]: Start difference. First operand 4758 states and 13447 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:36,796 INFO L93 Difference]: Finished difference Result 6221 states and 16821 transitions. [2021-06-12 15:31:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:31:36,796 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-12 15:31:36,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:36,802 INFO L225 Difference]: With dead ends: 6221 [2021-06-12 15:31:36,802 INFO L226 Difference]: Without dead ends: 5646 [2021-06-12 15:31:36,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 968.5ms TimeCoverageRelationStatistics Valid=1452, Invalid=4554, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:31:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-06-12 15:31:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 3203. [2021-06-12 15:31:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7382885696439727) internal successors, (8768), 3202 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:36,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8768 transitions. [2021-06-12 15:31:36,857 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8768 transitions. Word has length 140 [2021-06-12 15:31:36,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:36,858 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8768 transitions. [2021-06-12 15:31:36,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8768 transitions. [2021-06-12 15:31:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:36,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:36,861 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:37,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 15:31:37,068 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1739326839, now seen corresponding path program 249 times [2021-06-12 15:31:37,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:37,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780452413] [2021-06-12 15:31:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:37,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:37,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780452413] [2021-06-12 15:31:37,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780452413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:37,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809812656] [2021-06-12 15:31:37,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:37,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:37,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:37,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:37,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:37,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809812656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:37,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:37,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:37,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924259696] [2021-06-12 15:31:37,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:37,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:37,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:37,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:37,615 INFO L87 Difference]: Start difference. First operand 3203 states and 8768 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:38,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:38,100 INFO L93 Difference]: Finished difference Result 4721 states and 12007 transitions. [2021-06-12 15:31:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:31:38,100 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:38,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:38,105 INFO L225 Difference]: With dead ends: 4721 [2021-06-12 15:31:38,105 INFO L226 Difference]: Without dead ends: 4451 [2021-06-12 15:31:38,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=844, Invalid=2348, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:31:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-12 15:31:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3278. [2021-06-12 15:31:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.744278303326213) internal successors, (8993), 3277 states have internal predecessors, (8993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 8993 transitions. [2021-06-12 15:31:38,142 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 8993 transitions. Word has length 145 [2021-06-12 15:31:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:38,142 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 8993 transitions. [2021-06-12 15:31:38,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 8993 transitions. [2021-06-12 15:31:38,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:38,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:38,144 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:38,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-12 15:31:38,344 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash 102019961, now seen corresponding path program 250 times [2021-06-12 15:31:38,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:38,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802060958] [2021-06-12 15:31:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:38,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:38,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802060958] [2021-06-12 15:31:38,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802060958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:38,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048454360] [2021-06-12 15:31:38,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:38,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:38,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:38,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:38,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:38,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048454360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:38,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:38,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:38,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213649549] [2021-06-12 15:31:38,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:38,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:38,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:38,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:38,901 INFO L87 Difference]: Start difference. First operand 3278 states and 8993 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:39,426 INFO L93 Difference]: Finished difference Result 5291 states and 13222 transitions. [2021-06-12 15:31:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:31:39,426 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:39,431 INFO L225 Difference]: With dead ends: 5291 [2021-06-12 15:31:39,431 INFO L226 Difference]: Without dead ends: 5021 [2021-06-12 15:31:39,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 666.5ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:31:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-06-12 15:31:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 3353. [2021-06-12 15:31:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.75) internal successors, (9218), 3352 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9218 transitions. [2021-06-12 15:31:39,472 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9218 transitions. Word has length 145 [2021-06-12 15:31:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:39,472 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9218 transitions. [2021-06-12 15:31:39,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9218 transitions. [2021-06-12 15:31:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:39,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:39,475 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:39,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:39,681 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:39,681 INFO L82 PathProgramCache]: Analyzing trace with hash 983579143, now seen corresponding path program 251 times [2021-06-12 15:31:39,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:39,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956198318] [2021-06-12 15:31:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:39,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:39,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956198318] [2021-06-12 15:31:39,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956198318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:39,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296970026] [2021-06-12 15:31:39,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:40,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:40,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:40,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:40,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:40,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296970026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:40,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:40,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:40,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102224812] [2021-06-12 15:31:40,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:40,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:40,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:40,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:40,222 INFO L87 Difference]: Start difference. First operand 3353 states and 9218 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:40,751 INFO L93 Difference]: Finished difference Result 5321 states and 13357 transitions. [2021-06-12 15:31:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:31:40,752 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:40,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:40,757 INFO L225 Difference]: With dead ends: 5321 [2021-06-12 15:31:40,757 INFO L226 Difference]: Without dead ends: 5051 [2021-06-12 15:31:40,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 607.9ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:31:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-12 15:31:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3428. [2021-06-12 15:31:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7554712576597606) internal successors, (9443), 3427 states have internal predecessors, (9443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9443 transitions. [2021-06-12 15:31:40,802 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9443 transitions. Word has length 145 [2021-06-12 15:31:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:40,802 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9443 transitions. [2021-06-12 15:31:40,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:40,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9443 transitions. [2021-06-12 15:31:40,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:40,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:40,806 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:41,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-12 15:31:41,021 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash 341204727, now seen corresponding path program 252 times [2021-06-12 15:31:41,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:41,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369844526] [2021-06-12 15:31:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:41,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:41,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369844526] [2021-06-12 15:31:41,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369844526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:41,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321875737] [2021-06-12 15:31:41,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:41,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:41,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:41,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:41,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:41,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321875737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:41,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:41,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:41,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661534828] [2021-06-12 15:31:41,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:41,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:41,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:41,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:41,574 INFO L87 Difference]: Start difference. First operand 3428 states and 9443 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:42,179 INFO L93 Difference]: Finished difference Result 5346 states and 13482 transitions. [2021-06-12 15:31:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:31:42,180 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:42,185 INFO L225 Difference]: With dead ends: 5346 [2021-06-12 15:31:42,185 INFO L226 Difference]: Without dead ends: 5076 [2021-06-12 15:31:42,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 694.1ms TimeCoverageRelationStatistics Valid=922, Invalid=2860, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:31:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-12 15:31:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3503. [2021-06-12 15:31:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7607081667618503) internal successors, (9668), 3502 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9668 transitions. [2021-06-12 15:31:42,233 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9668 transitions. Word has length 145 [2021-06-12 15:31:42,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:42,233 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9668 transitions. [2021-06-12 15:31:42,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:42,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9668 transitions. [2021-06-12 15:31:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:42,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:42,236 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:42,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:42,436 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash 294657797, now seen corresponding path program 253 times [2021-06-12 15:31:42,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:42,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750257394] [2021-06-12 15:31:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:42,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:42,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750257394] [2021-06-12 15:31:42,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750257394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:42,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741874932] [2021-06-12 15:31:42,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:42,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:42,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:42,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741874932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:42,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:42,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:42,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418574054] [2021-06-12 15:31:42,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:42,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:42,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:42,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:42,926 INFO L87 Difference]: Start difference. First operand 3503 states and 9668 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:43,499 INFO L93 Difference]: Finished difference Result 5371 states and 13607 transitions. [2021-06-12 15:31:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:31:43,499 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:43,503 INFO L225 Difference]: With dead ends: 5371 [2021-06-12 15:31:43,503 INFO L226 Difference]: Without dead ends: 5101 [2021-06-12 15:31:43,503 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 635.1ms TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:31:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-12 15:31:43,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3578. [2021-06-12 15:31:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.7657254682694994) internal successors, (9893), 3577 states have internal predecessors, (9893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9893 transitions. [2021-06-12 15:31:43,543 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9893 transitions. Word has length 145 [2021-06-12 15:31:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:43,544 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9893 transitions. [2021-06-12 15:31:43,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9893 transitions. [2021-06-12 15:31:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:43,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:43,547 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:43,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:43,749 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash -623726603, now seen corresponding path program 254 times [2021-06-12 15:31:43,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:43,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948989383] [2021-06-12 15:31:43,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:43,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:43,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948989383] [2021-06-12 15:31:43,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948989383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:43,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490949558] [2021-06-12 15:31:43,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:44,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:44,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:44,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:44,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490949558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:44,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:44,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:44,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903898196] [2021-06-12 15:31:44,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:44,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:44,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:44,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:44,246 INFO L87 Difference]: Start difference. First operand 3578 states and 9893 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:44,887 INFO L93 Difference]: Finished difference Result 5396 states and 13732 transitions. [2021-06-12 15:31:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:31:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:44,892 INFO L225 Difference]: With dead ends: 5396 [2021-06-12 15:31:44,892 INFO L226 Difference]: Without dead ends: 5126 [2021-06-12 15:31:44,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 711.1ms TimeCoverageRelationStatistics Valid=955, Invalid=3077, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:31:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-12 15:31:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3653. [2021-06-12 15:31:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.7705366922234393) internal successors, (10118), 3652 states have internal predecessors, (10118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10118 transitions. [2021-06-12 15:31:44,946 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10118 transitions. Word has length 145 [2021-06-12 15:31:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:44,946 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10118 transitions. [2021-06-12 15:31:44,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10118 transitions. [2021-06-12 15:31:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:44,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:44,950 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:45,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:45,150 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:45,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1894549891, now seen corresponding path program 255 times [2021-06-12 15:31:45,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:45,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762842691] [2021-06-12 15:31:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:45,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:45,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762842691] [2021-06-12 15:31:45,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762842691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:45,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623112896] [2021-06-12 15:31:45,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:45,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:45,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 15:31:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:45,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623112896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:45,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:45,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:45,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213590088] [2021-06-12 15:31:45,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:45,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:45,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:45,630 INFO L87 Difference]: Start difference. First operand 3653 states and 10118 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:46,220 INFO L93 Difference]: Finished difference Result 5421 states and 13857 transitions. [2021-06-12 15:31:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:31:46,220 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:46,225 INFO L225 Difference]: With dead ends: 5421 [2021-06-12 15:31:46,226 INFO L226 Difference]: Without dead ends: 5151 [2021-06-12 15:31:46,226 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 638.5ms TimeCoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:31:46,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-12 15:31:46,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3728. [2021-06-12 15:31:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.775154279581433) internal successors, (10343), 3727 states have internal predecessors, (10343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10343 transitions. [2021-06-12 15:31:46,273 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10343 transitions. Word has length 145 [2021-06-12 15:31:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:46,273 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10343 transitions. [2021-06-12 15:31:46,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10343 transitions. [2021-06-12 15:31:46,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:46,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:46,276 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:46,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:46,476 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash -300775821, now seen corresponding path program 256 times [2021-06-12 15:31:46,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:46,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761076492] [2021-06-12 15:31:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:46,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:46,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761076492] [2021-06-12 15:31:46,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761076492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:46,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209279539] [2021-06-12 15:31:46,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:46,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:46,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:46,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:46,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:46,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209279539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:46,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:46,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:46,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908279183] [2021-06-12 15:31:46,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:46,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:46,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:46,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:46,990 INFO L87 Difference]: Start difference. First operand 3728 states and 10343 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:47,700 INFO L93 Difference]: Finished difference Result 5446 states and 13982 transitions. [2021-06-12 15:31:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:31:47,700 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:47,713 INFO L225 Difference]: With dead ends: 5446 [2021-06-12 15:31:47,714 INFO L226 Difference]: Without dead ends: 5176 [2021-06-12 15:31:47,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 760.8ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:31:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-12 15:31:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3803. [2021-06-12 15:31:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.7795896896370333) internal successors, (10568), 3802 states have internal predecessors, (10568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10568 transitions. [2021-06-12 15:31:47,758 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10568 transitions. Word has length 145 [2021-06-12 15:31:47,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:47,758 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10568 transitions. [2021-06-12 15:31:47,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10568 transitions. [2021-06-12 15:31:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:47,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:47,761 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:47,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:47,962 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:47,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:47,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1209424257, now seen corresponding path program 257 times [2021-06-12 15:31:47,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:47,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442888242] [2021-06-12 15:31:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:48,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442888242] [2021-06-12 15:31:48,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442888242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444566136] [2021-06-12 15:31:48,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:48,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:48,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:48,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:48,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:48,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444566136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:48,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:48,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:48,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051375487] [2021-06-12 15:31:48,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:48,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:48,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:48,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:48,453 INFO L87 Difference]: Start difference. First operand 3803 states and 10568 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:49,105 INFO L93 Difference]: Finished difference Result 5471 states and 14107 transitions. [2021-06-12 15:31:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:31:49,105 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:49,110 INFO L225 Difference]: With dead ends: 5471 [2021-06-12 15:31:49,111 INFO L226 Difference]: Without dead ends: 5201 [2021-06-12 15:31:49,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 662.3ms TimeCoverageRelationStatistics Valid=1040, Invalid=3250, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:31:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-12 15:31:49,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 3878. [2021-06-12 15:31:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7838534949703377) internal successors, (10793), 3877 states have internal predecessors, (10793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10793 transitions. [2021-06-12 15:31:49,158 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10793 transitions. Word has length 145 [2021-06-12 15:31:49,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:49,158 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10793 transitions. [2021-06-12 15:31:49,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:49,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10793 transitions. [2021-06-12 15:31:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:49,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:49,161 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:49,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-12 15:31:49,362 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:49,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1849082481, now seen corresponding path program 258 times [2021-06-12 15:31:49,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:49,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328264088] [2021-06-12 15:31:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:49,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:49,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328264088] [2021-06-12 15:31:49,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328264088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:49,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436024154] [2021-06-12 15:31:49,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:49,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:49,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:49,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:49,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:49,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436024154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:49,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:49,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:49,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912766633] [2021-06-12 15:31:49,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:49,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:49,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:49,885 INFO L87 Difference]: Start difference. First operand 3878 states and 10793 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:50,673 INFO L93 Difference]: Finished difference Result 5496 states and 14232 transitions. [2021-06-12 15:31:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:31:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:50,679 INFO L225 Difference]: With dead ends: 5496 [2021-06-12 15:31:50,679 INFO L226 Difference]: Without dead ends: 5226 [2021-06-12 15:31:50,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 821.0ms TimeCoverageRelationStatistics Valid=1069, Invalid=3487, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:31:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-12 15:31:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3953. [2021-06-12 15:31:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7879554655870447) internal successors, (11018), 3952 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 11018 transitions. [2021-06-12 15:31:50,728 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 11018 transitions. Word has length 145 [2021-06-12 15:31:50,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:50,728 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 11018 transitions. [2021-06-12 15:31:50,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:50,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 11018 transitions. [2021-06-12 15:31:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:50,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:50,731 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:50,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:50,932 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1074163455, now seen corresponding path program 259 times [2021-06-12 15:31:50,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:50,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966880495] [2021-06-12 15:31:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:51,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:51,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966880495] [2021-06-12 15:31:51,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966880495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:51,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872423223] [2021-06-12 15:31:51,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:51,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:51,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:51,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872423223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:51,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:51,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:51,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981917732] [2021-06-12 15:31:51,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:51,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:51,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:51,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:51,396 INFO L87 Difference]: Start difference. First operand 3953 states and 11018 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:52,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:52,093 INFO L93 Difference]: Finished difference Result 5521 states and 14357 transitions. [2021-06-12 15:31:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:31:52,093 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:52,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:52,098 INFO L225 Difference]: With dead ends: 5521 [2021-06-12 15:31:52,098 INFO L226 Difference]: Without dead ends: 5251 [2021-06-12 15:31:52,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 701.6ms TimeCoverageRelationStatistics Valid=1119, Invalid=3437, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:31:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-12 15:31:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4028. [2021-06-12 15:31:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 2.7919046436553265) internal successors, (11243), 4027 states have internal predecessors, (11243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11243 transitions. [2021-06-12 15:31:52,149 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11243 transitions. Word has length 145 [2021-06-12 15:31:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:52,149 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11243 transitions. [2021-06-12 15:31:52,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11243 transitions. [2021-06-12 15:31:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:52,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:52,152 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:52,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-12 15:31:52,353 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:52,353 INFO L82 PathProgramCache]: Analyzing trace with hash 620250095, now seen corresponding path program 260 times [2021-06-12 15:31:52,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:52,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748082317] [2021-06-12 15:31:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:52,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:52,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748082317] [2021-06-12 15:31:52,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748082317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:52,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863376137] [2021-06-12 15:31:52,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:52,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:52,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:52,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863376137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:52,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:52,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:52,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932213115] [2021-06-12 15:31:52,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:52,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:52,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:52,830 INFO L87 Difference]: Start difference. First operand 4028 states and 11243 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:53,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:53,643 INFO L93 Difference]: Finished difference Result 5546 states and 14482 transitions. [2021-06-12 15:31:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:31:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:53,648 INFO L225 Difference]: With dead ends: 5546 [2021-06-12 15:31:53,648 INFO L226 Difference]: Without dead ends: 5276 [2021-06-12 15:31:53,649 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 830.2ms TimeCoverageRelationStatistics Valid=1150, Invalid=3680, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:31:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-12 15:31:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4103. [2021-06-12 15:31:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4103 states, 4102 states have (on average 2.795709410043881) internal successors, (11468), 4102 states have internal predecessors, (11468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11468 transitions. [2021-06-12 15:31:53,695 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11468 transitions. Word has length 145 [2021-06-12 15:31:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:53,695 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11468 transitions. [2021-06-12 15:31:53,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:53,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11468 transitions. [2021-06-12 15:31:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:53,699 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:53,699 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:53,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-12 15:31:53,899 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:53,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1498262013, now seen corresponding path program 261 times [2021-06-12 15:31:53,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:53,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597921239] [2021-06-12 15:31:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:54,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:54,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597921239] [2021-06-12 15:31:54,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597921239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:54,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871219635] [2021-06-12 15:31:54,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:54,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:54,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:31:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:54,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871219635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:54,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:54,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:54,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454450738] [2021-06-12 15:31:54,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:54,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:54,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:54,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:54,352 INFO L87 Difference]: Start difference. First operand 4103 states and 11468 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:55,086 INFO L93 Difference]: Finished difference Result 5571 states and 14607 transitions. [2021-06-12 15:31:55,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:31:55,087 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:55,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:55,092 INFO L225 Difference]: With dead ends: 5571 [2021-06-12 15:31:55,092 INFO L226 Difference]: Without dead ends: 5301 [2021-06-12 15:31:55,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 727.3ms TimeCoverageRelationStatistics Valid=1214, Invalid=3616, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:31:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-12 15:31:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4178. [2021-06-12 15:31:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.799377543691645) internal successors, (11693), 4177 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11693 transitions. [2021-06-12 15:31:55,142 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11693 transitions. Word has length 145 [2021-06-12 15:31:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:55,142 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11693 transitions. [2021-06-12 15:31:55,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11693 transitions. [2021-06-12 15:31:55,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:55,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:55,145 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:55,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:55,356 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:55,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:55,356 INFO L82 PathProgramCache]: Analyzing trace with hash 598207213, now seen corresponding path program 262 times [2021-06-12 15:31:55,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:55,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024995763] [2021-06-12 15:31:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:55,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024995763] [2021-06-12 15:31:55,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024995763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075811404] [2021-06-12 15:31:55,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:55,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:55,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:55,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:55,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:55,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075811404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:55,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:55,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:55,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882254145] [2021-06-12 15:31:55,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:55,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:55,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:55,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:55,827 INFO L87 Difference]: Start difference. First operand 4178 states and 11693 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:56,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:56,711 INFO L93 Difference]: Finished difference Result 5596 states and 14732 transitions. [2021-06-12 15:31:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:31:56,711 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:56,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:56,716 INFO L225 Difference]: With dead ends: 5596 [2021-06-12 15:31:56,716 INFO L226 Difference]: Without dead ends: 5326 [2021-06-12 15:31:56,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 871.7ms TimeCoverageRelationStatistics Valid=1247, Invalid=3865, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:31:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-12 15:31:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4253. [2021-06-12 15:31:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4253 states, 4252 states have (on average 2.8029162746942617) internal successors, (11918), 4252 states have internal predecessors, (11918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11918 transitions. [2021-06-12 15:31:56,766 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11918 transitions. Word has length 145 [2021-06-12 15:31:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:56,766 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11918 transitions. [2021-06-12 15:31:56,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11918 transitions. [2021-06-12 15:31:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:56,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:56,770 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:56,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-12 15:31:56,970 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:56,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:56,970 INFO L82 PathProgramCache]: Analyzing trace with hash 169142907, now seen corresponding path program 263 times [2021-06-12 15:31:56,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:56,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514384424] [2021-06-12 15:31:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:57,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:57,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514384424] [2021-06-12 15:31:57,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514384424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:57,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324211312] [2021-06-12 15:31:57,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:57,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:57,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:57,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:57,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324211312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:57,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:57,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:57,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125787797] [2021-06-12 15:31:57,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:57,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:57,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:57,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:57,430 INFO L87 Difference]: Start difference. First operand 4253 states and 11918 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:58,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:58,203 INFO L93 Difference]: Finished difference Result 5621 states and 14857 transitions. [2021-06-12 15:31:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:31:58,204 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:58,209 INFO L225 Difference]: With dead ends: 5621 [2021-06-12 15:31:58,209 INFO L226 Difference]: Without dead ends: 5351 [2021-06-12 15:31:58,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 745.8ms TimeCoverageRelationStatistics Valid=1325, Invalid=3787, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:31:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-12 15:31:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4328. [2021-06-12 15:31:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 4327 states have (on average 2.8063323318696556) internal successors, (12143), 4327 states have internal predecessors, (12143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12143 transitions. [2021-06-12 15:31:58,260 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12143 transitions. Word has length 145 [2021-06-12 15:31:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:58,260 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12143 transitions. [2021-06-12 15:31:58,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12143 transitions. [2021-06-12 15:31:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:58,263 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:58,263 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:58,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:58,464 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:58,464 INFO L82 PathProgramCache]: Analyzing trace with hash -517040277, now seen corresponding path program 264 times [2021-06-12 15:31:58,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:58,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190939655] [2021-06-12 15:31:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:58,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:58,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190939655] [2021-06-12 15:31:58,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190939655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:58,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271442618] [2021-06-12 15:31:58,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:58,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:58,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:31:58,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:58,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271442618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:58,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:58,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:58,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691073629] [2021-06-12 15:31:58,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:58,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:58,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:58,933 INFO L87 Difference]: Start difference. First operand 4328 states and 12143 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:59,831 INFO L93 Difference]: Finished difference Result 5646 states and 14982 transitions. [2021-06-12 15:31:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:31:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:31:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:59,837 INFO L225 Difference]: With dead ends: 5646 [2021-06-12 15:31:59,837 INFO L226 Difference]: Without dead ends: 5376 [2021-06-12 15:31:59,838 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 882.3ms TimeCoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:31:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-12 15:31:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4403. [2021-06-12 15:31:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 4402 states have (on average 2.809631985461154) internal successors, (12368), 4402 states have internal predecessors, (12368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12368 transitions. [2021-06-12 15:31:59,892 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12368 transitions. Word has length 145 [2021-06-12 15:31:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:59,892 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12368 transitions. [2021-06-12 15:31:59,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12368 transitions. [2021-06-12 15:31:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:59,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:59,896 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:00,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:00,097 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -602075015, now seen corresponding path program 265 times [2021-06-12 15:32:00,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:00,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909830760] [2021-06-12 15:32:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:00,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:00,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909830760] [2021-06-12 15:32:00,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909830760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:00,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5904379] [2021-06-12 15:32:00,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:00,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:00,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5904379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:00,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:00,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:32:00,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102349159] [2021-06-12 15:32:00,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:00,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:00,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:00,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:00,534 INFO L87 Difference]: Start difference. First operand 4403 states and 12368 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:01,337 INFO L93 Difference]: Finished difference Result 5671 states and 15107 transitions. [2021-06-12 15:32:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:32:01,338 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:32:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:01,343 INFO L225 Difference]: With dead ends: 5671 [2021-06-12 15:32:01,343 INFO L226 Difference]: Without dead ends: 5401 [2021-06-12 15:32:01,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 767.8ms TimeCoverageRelationStatistics Valid=1452, Invalid=3950, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:32:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-12 15:32:01,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4478. [2021-06-12 15:32:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.812821085548358) internal successors, (12593), 4477 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12593 transitions. [2021-06-12 15:32:01,399 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12593 transitions. Word has length 145 [2021-06-12 15:32:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:01,399 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12593 transitions. [2021-06-12 15:32:01,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12593 transitions. [2021-06-12 15:32:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:01,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:01,403 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:01,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:01,603 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash -670226071, now seen corresponding path program 266 times [2021-06-12 15:32:01,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:01,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300128207] [2021-06-12 15:32:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:01,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:01,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300128207] [2021-06-12 15:32:01,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300128207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:01,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166216231] [2021-06-12 15:32:01,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:01,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:01,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:01,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:01,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:02,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166216231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:02,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:02,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:32:02,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449541362] [2021-06-12 15:32:02,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:02,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:02,062 INFO L87 Difference]: Start difference. First operand 4478 states and 12593 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:03,050 INFO L93 Difference]: Finished difference Result 5696 states and 15232 transitions. [2021-06-12 15:32:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:32:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:32:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:03,056 INFO L225 Difference]: With dead ends: 5696 [2021-06-12 15:32:03,056 INFO L226 Difference]: Without dead ends: 5426 [2021-06-12 15:32:03,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 962.4ms TimeCoverageRelationStatistics Valid=1489, Invalid=4211, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:32:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-12 15:32:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4553. [2021-06-12 15:32:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 2.8159050966608086) internal successors, (12818), 4552 states have internal predecessors, (12818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12818 transitions. [2021-06-12 15:32:03,110 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12818 transitions. Word has length 145 [2021-06-12 15:32:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:03,110 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12818 transitions. [2021-06-12 15:32:03,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12818 transitions. [2021-06-12 15:32:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:03,114 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:03,114 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:03,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:03,314 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1967195145, now seen corresponding path program 267 times [2021-06-12 15:32:03,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:03,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243127180] [2021-06-12 15:32:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:03,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243127180] [2021-06-12 15:32:03,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243127180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433730558] [2021-06-12 15:32:03,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:03,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:32:03,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:32:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:03,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433730558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:03,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:03,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:32:03,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352086962] [2021-06-12 15:32:03,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:03,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:03,782 INFO L87 Difference]: Start difference. First operand 4553 states and 12818 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:04,626 INFO L93 Difference]: Finished difference Result 5766 states and 15477 transitions. [2021-06-12 15:32:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:32:04,627 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:32:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:04,632 INFO L225 Difference]: With dead ends: 5766 [2021-06-12 15:32:04,632 INFO L226 Difference]: Without dead ends: 5496 [2021-06-12 15:32:04,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=1595, Invalid=4105, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:32:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-06-12 15:32:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4628. [2021-06-12 15:32:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.822130970391182) internal successors, (13058), 4627 states have internal predecessors, (13058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13058 transitions. [2021-06-12 15:32:04,685 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13058 transitions. Word has length 145 [2021-06-12 15:32:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:04,685 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13058 transitions. [2021-06-12 15:32:04,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13058 transitions. [2021-06-12 15:32:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:04,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:04,689 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:04,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:04,889 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1537441561, now seen corresponding path program 268 times [2021-06-12 15:32:04,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:04,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830315461] [2021-06-12 15:32:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:05,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:05,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830315461] [2021-06-12 15:32:05,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830315461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:05,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590829763] [2021-06-12 15:32:05,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:05,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:05,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:05,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:05,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:05,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590829763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:05,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:05,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:32:05,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902446196] [2021-06-12 15:32:05,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:05,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:05,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:05,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:05,344 INFO L87 Difference]: Start difference. First operand 4628 states and 13058 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:06,434 INFO L93 Difference]: Finished difference Result 6344 states and 17103 transitions. [2021-06-12 15:32:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:32:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:32:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:06,439 INFO L225 Difference]: With dead ends: 6344 [2021-06-12 15:32:06,440 INFO L226 Difference]: Without dead ends: 5721 [2021-06-12 15:32:06,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 1026.8ms TimeCoverageRelationStatistics Valid=1657, Invalid=4663, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:32:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-12 15:32:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4703. [2021-06-12 15:32:06,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 2.8260314759676732) internal successors, (13288), 4702 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13288 transitions. [2021-06-12 15:32:06,490 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13288 transitions. Word has length 145 [2021-06-12 15:32:06,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:06,491 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13288 transitions. [2021-06-12 15:32:06,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:06,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13288 transitions. [2021-06-12 15:32:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:06,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:06,494 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:06,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:06,695 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1595175691, now seen corresponding path program 269 times [2021-06-12 15:32:06,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:06,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440162259] [2021-06-12 15:32:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:06,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:06,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440162259] [2021-06-12 15:32:06,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440162259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:06,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255071883] [2021-06-12 15:32:06,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:06,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:32:06,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:06,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:06,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:07,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255071883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:07,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:07,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:32:07,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304023627] [2021-06-12 15:32:07,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:07,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:07,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:07,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:07,156 INFO L87 Difference]: Start difference. First operand 4703 states and 13288 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:08,140 INFO L93 Difference]: Finished difference Result 6548 states and 17771 transitions. [2021-06-12 15:32:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:32:08,140 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:32:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:08,147 INFO L225 Difference]: With dead ends: 6548 [2021-06-12 15:32:08,147 INFO L226 Difference]: Without dead ends: 6278 [2021-06-12 15:32:08,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 944.6ms TimeCoverageRelationStatistics Valid=1755, Invalid=4251, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:32:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2021-06-12 15:32:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 4883. [2021-06-12 15:32:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4883 states, 4882 states have (on average 2.8363375665710775) internal successors, (13847), 4882 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 13847 transitions. [2021-06-12 15:32:08,213 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 13847 transitions. Word has length 145 [2021-06-12 15:32:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:08,213 INFO L482 AbstractCegarLoop]: Abstraction has 4883 states and 13847 transitions. [2021-06-12 15:32:08,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 13847 transitions. [2021-06-12 15:32:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:08,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:08,217 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:08,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-12 15:32:08,433 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:08,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1572832441, now seen corresponding path program 270 times [2021-06-12 15:32:08,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:08,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818038616] [2021-06-12 15:32:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:08,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:08,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818038616] [2021-06-12 15:32:08,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818038616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:08,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176865139] [2021-06-12 15:32:08,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:08,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:32:08,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:08,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176865139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:08,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:08,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:32:08,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072012910] [2021-06-12 15:32:08,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:08,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:08,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:08,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:08,890 INFO L87 Difference]: Start difference. First operand 4883 states and 13847 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:10,032 INFO L93 Difference]: Finished difference Result 6010 states and 16421 transitions. [2021-06-12 15:32:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:32:10,033 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-12 15:32:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:10,038 INFO L225 Difference]: With dead ends: 6010 [2021-06-12 15:32:10,038 INFO L226 Difference]: Without dead ends: 5521 [2021-06-12 15:32:10,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1092.3ms TimeCoverageRelationStatistics Valid=1600, Invalid=4562, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:32:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2021-06-12 15:32:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 4828. [2021-06-12 15:32:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.834679925419515) internal successors, (13683), 4827 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13683 transitions. [2021-06-12 15:32:10,094 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13683 transitions. Word has length 145 [2021-06-12 15:32:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:10,094 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13683 transitions. [2021-06-12 15:32:10,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13683 transitions. [2021-06-12 15:32:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:10,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:10,098 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:10,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-12 15:32:10,315 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:10,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1174739515, now seen corresponding path program 271 times [2021-06-12 15:32:10,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:10,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829434556] [2021-06-12 15:32:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:10,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:10,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829434556] [2021-06-12 15:32:10,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829434556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:10,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027170452] [2021-06-12 15:32:10,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:10,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:32:10,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:10,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027170452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:10,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:10,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 33 [2021-06-12 15:32:10,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468837502] [2021-06-12 15:32:10,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:32:10,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:10,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:32:10,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:32:10,948 INFO L87 Difference]: Start difference. First operand 4828 states and 13683 transitions. Second operand has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:11,586 INFO L93 Difference]: Finished difference Result 6068 states and 16483 transitions. [2021-06-12 15:32:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:32:11,586 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:11,593 INFO L225 Difference]: With dead ends: 6068 [2021-06-12 15:32:11,593 INFO L226 Difference]: Without dead ends: 5734 [2021-06-12 15:32:11,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 747.9ms TimeCoverageRelationStatistics Valid=1064, Invalid=2842, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:32:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states. [2021-06-12 15:32:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5734 to 4913. [2021-06-12 15:32:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4913 states, 4912 states have (on average 2.8202361563517915) internal successors, (13853), 4912 states have internal predecessors, (13853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 13853 transitions. [2021-06-12 15:32:11,653 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 13853 transitions. Word has length 150 [2021-06-12 15:32:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:11,653 INFO L482 AbstractCegarLoop]: Abstraction has 4913 states and 13853 transitions. [2021-06-12 15:32:11,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 13853 transitions. [2021-06-12 15:32:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:11,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:11,657 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:11,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-12 15:32:11,869 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash 174102121, now seen corresponding path program 272 times [2021-06-12 15:32:11,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:11,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791163736] [2021-06-12 15:32:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:12,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:12,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791163736] [2021-06-12 15:32:12,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791163736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:12,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883366859] [2021-06-12 15:32:12,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:12,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:12,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:12,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:12,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:12,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883366859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:12,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:12,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:12,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728809358] [2021-06-12 15:32:12,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:12,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:12,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:12,434 INFO L87 Difference]: Start difference. First operand 4913 states and 13853 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:12,918 INFO L93 Difference]: Finished difference Result 7061 states and 18277 transitions. [2021-06-12 15:32:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:32:12,919 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:12,925 INFO L225 Difference]: With dead ends: 7061 [2021-06-12 15:32:12,925 INFO L226 Difference]: Without dead ends: 6791 [2021-06-12 15:32:12,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 620.4ms TimeCoverageRelationStatistics Valid=894, Invalid=2298, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:32:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6791 states. [2021-06-12 15:32:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6791 to 4928. [2021-06-12 15:32:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:12,980 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:12,980 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:12,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:12,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:12,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:12,984 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:13,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-06-12 15:32:13,185 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:13,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:13,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1057153881, now seen corresponding path program 273 times [2021-06-12 15:32:13,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:13,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706617719] [2021-06-12 15:32:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:13,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:13,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706617719] [2021-06-12 15:32:13,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706617719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:13,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046243016] [2021-06-12 15:32:13,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:13,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:32:13,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:13,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:13,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046243016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:13,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:13,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:13,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800138406] [2021-06-12 15:32:13,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:13,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:13,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:13,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:13,765 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:14,338 INFO L93 Difference]: Finished difference Result 6946 states and 18047 transitions. [2021-06-12 15:32:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:32:14,338 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:14,344 INFO L225 Difference]: With dead ends: 6946 [2021-06-12 15:32:14,344 INFO L226 Difference]: Without dead ends: 6676 [2021-06-12 15:32:14,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:32:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-06-12 15:32:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 4928. [2021-06-12 15:32:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:14,398 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:14,398 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:14,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:14,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:14,402 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:14,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:14,602 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:14,602 INFO L82 PathProgramCache]: Analyzing trace with hash -835055513, now seen corresponding path program 274 times [2021-06-12 15:32:14,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:14,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722773087] [2021-06-12 15:32:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:14,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:14,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722773087] [2021-06-12 15:32:14,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722773087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:14,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399694573] [2021-06-12 15:32:14,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:14,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:14,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:14,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:14,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:15,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399694573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:15,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:15,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:15,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338291086] [2021-06-12 15:32:15,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:15,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:15,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:15,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:15,121 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:15,687 INFO L93 Difference]: Finished difference Result 6921 states and 17997 transitions. [2021-06-12 15:32:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:32:15,687 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:15,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:15,692 INFO L225 Difference]: With dead ends: 6921 [2021-06-12 15:32:15,692 INFO L226 Difference]: Without dead ends: 6651 [2021-06-12 15:32:15,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=894, Invalid=2528, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:32:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-12 15:32:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 4928. [2021-06-12 15:32:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:15,746 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:15,746 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:15,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:15,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:15,751 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:15,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-12 15:32:15,951 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1006291287, now seen corresponding path program 275 times [2021-06-12 15:32:15,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:15,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401372482] [2021-06-12 15:32:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:16,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401372482] [2021-06-12 15:32:16,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401372482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87710726] [2021-06-12 15:32:16,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:16,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:32:16,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:16,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87710726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:16,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:16,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:16,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050254604] [2021-06-12 15:32:16,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:16,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:16,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:16,496 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:17,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:17,174 INFO L93 Difference]: Finished difference Result 6871 states and 17897 transitions. [2021-06-12 15:32:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:32:17,174 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:17,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:17,181 INFO L225 Difference]: With dead ends: 6871 [2021-06-12 15:32:17,181 INFO L226 Difference]: Without dead ends: 6601 [2021-06-12 15:32:17,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 722.2ms TimeCoverageRelationStatistics Valid=979, Invalid=2927, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:32:17,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-12 15:32:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 4928. [2021-06-12 15:32:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:17,250 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:17,250 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:17,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:17,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:17,254 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:17,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:17,454 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:17,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:17,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1887850469, now seen corresponding path program 276 times [2021-06-12 15:32:17,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:17,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084085426] [2021-06-12 15:32:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:17,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:17,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084085426] [2021-06-12 15:32:17,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084085426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:17,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216631946] [2021-06-12 15:32:17,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:17,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:32:17,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:17,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:17,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:17,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216631946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:17,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:17,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:17,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729617267] [2021-06-12 15:32:17,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:17,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:17,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:17,977 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:18,572 INFO L93 Difference]: Finished difference Result 6821 states and 17797 transitions. [2021-06-12 15:32:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:32:18,572 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:18,579 INFO L225 Difference]: With dead ends: 6821 [2021-06-12 15:32:18,579 INFO L226 Difference]: Without dead ends: 6551 [2021-06-12 15:32:18,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=910, Invalid=2750, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:32:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-06-12 15:32:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 4928. [2021-06-12 15:32:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:18,638 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:18,638 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:18,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:18,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:18,664 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:18,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:18,864 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:18,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1245476053, now seen corresponding path program 277 times [2021-06-12 15:32:18,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:18,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015853316] [2021-06-12 15:32:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:19,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:19,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015853316] [2021-06-12 15:32:19,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015853316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:19,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619745715] [2021-06-12 15:32:19,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:19,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619745715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:19,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:19,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:19,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000885] [2021-06-12 15:32:19,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:19,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:19,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:19,406 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:20,084 INFO L93 Difference]: Finished difference Result 6771 states and 17697 transitions. [2021-06-12 15:32:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:32:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:20,091 INFO L225 Difference]: With dead ends: 6771 [2021-06-12 15:32:20,091 INFO L226 Difference]: Without dead ends: 6501 [2021-06-12 15:32:20,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 761.6ms TimeCoverageRelationStatistics Valid=1003, Invalid=3157, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:32:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-06-12 15:32:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 4928. [2021-06-12 15:32:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:20,149 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:20,149 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:20,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:20,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:20,154 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:20,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:20,355 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:20,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1198929123, now seen corresponding path program 278 times [2021-06-12 15:32:20,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:20,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066305049] [2021-06-12 15:32:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:20,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:20,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066305049] [2021-06-12 15:32:20,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066305049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:20,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165933227] [2021-06-12 15:32:20,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:20,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:20,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:20,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:20,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:20,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165933227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:20,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:20,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:20,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877856533] [2021-06-12 15:32:20,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:20,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:20,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:20,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:20,884 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:21,535 INFO L93 Difference]: Finished difference Result 6721 states and 17597 transitions. [2021-06-12 15:32:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:32:21,536 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:21,542 INFO L225 Difference]: With dead ends: 6721 [2021-06-12 15:32:21,543 INFO L226 Difference]: Without dead ends: 6451 [2021-06-12 15:32:21,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 677.7ms TimeCoverageRelationStatistics Valid=942, Invalid=2964, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:32:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-12 15:32:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 4928. [2021-06-12 15:32:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:21,600 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:21,600 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:21,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:21,604 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:21,604 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:21,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:21,805 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:21,805 INFO L82 PathProgramCache]: Analyzing trace with hash 280544723, now seen corresponding path program 279 times [2021-06-12 15:32:21,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:21,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525893949] [2021-06-12 15:32:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:22,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:22,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525893949] [2021-06-12 15:32:22,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525893949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:22,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195699576] [2021-06-12 15:32:22,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:22,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:32:22,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:22,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 15:32:22,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:22,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195699576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:22,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:22,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:22,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116027313] [2021-06-12 15:32:22,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:22,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:22,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:22,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:22,401 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:23,131 INFO L93 Difference]: Finished difference Result 6671 states and 17497 transitions. [2021-06-12 15:32:23,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:32:23,131 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:23,138 INFO L225 Difference]: With dead ends: 6671 [2021-06-12 15:32:23,138 INFO L226 Difference]: Without dead ends: 6401 [2021-06-12 15:32:23,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 817.6ms TimeCoverageRelationStatistics Valid=952, Invalid=3208, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:32:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6401 states. [2021-06-12 15:32:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6401 to 4928. [2021-06-12 15:32:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:23,194 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:23,194 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:23,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:23,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:23,198 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:23,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-12 15:32:23,399 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:23,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1496146079, now seen corresponding path program 280 times [2021-06-12 15:32:23,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:23,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412192844] [2021-06-12 15:32:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:23,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:23,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412192844] [2021-06-12 15:32:23,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412192844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:23,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586627550] [2021-06-12 15:32:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:23,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:23,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:23,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586627550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:23,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:23,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:23,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541447053] [2021-06-12 15:32:23,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:23,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:23,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:23,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:23,945 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:24,639 INFO L93 Difference]: Finished difference Result 6621 states and 17397 transitions. [2021-06-12 15:32:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:32:24,639 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:24,646 INFO L225 Difference]: With dead ends: 6621 [2021-06-12 15:32:24,646 INFO L226 Difference]: Without dead ends: 6351 [2021-06-12 15:32:24,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 714.5ms TimeCoverageRelationStatistics Valid=990, Invalid=3170, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:32:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-06-12 15:32:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 4928. [2021-06-12 15:32:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:24,706 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:24,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:24,706 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:24,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:24,706 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:24,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:24,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:24,710 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:24,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-12 15:32:24,911 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:24,911 INFO L82 PathProgramCache]: Analyzing trace with hash 603495505, now seen corresponding path program 281 times [2021-06-12 15:32:24,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:24,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710347075] [2021-06-12 15:32:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:25,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:25,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710347075] [2021-06-12 15:32:25,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710347075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:25,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890308957] [2021-06-12 15:32:25,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:25,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:32:25,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:25,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890308957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:25,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:25,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:25,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889004897] [2021-06-12 15:32:25,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:25,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:25,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:25,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:25,442 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:26,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:26,247 INFO L93 Difference]: Finished difference Result 6571 states and 17297 transitions. [2021-06-12 15:32:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:32:26,248 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:26,255 INFO L225 Difference]: With dead ends: 6571 [2021-06-12 15:32:26,255 INFO L226 Difference]: Without dead ends: 6301 [2021-06-12 15:32:26,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 842.7ms TimeCoverageRelationStatistics Valid=1099, Invalid=3593, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:32:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2021-06-12 15:32:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 4928. [2021-06-12 15:32:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:26,314 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:26,314 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:26,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:26,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:26,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:26,318 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:26,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-12 15:32:26,534 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2113695583, now seen corresponding path program 282 times [2021-06-12 15:32:26,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:26,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207190554] [2021-06-12 15:32:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:26,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:26,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207190554] [2021-06-12 15:32:26,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207190554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:26,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433522460] [2021-06-12 15:32:26,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:26,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:32:26,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:26,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:26,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:27,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433522460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:27,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:27,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:27,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601209230] [2021-06-12 15:32:27,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:27,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:27,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:27,128 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:27,840 INFO L93 Difference]: Finished difference Result 6521 states and 17197 transitions. [2021-06-12 15:32:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:32:27,840 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:27,847 INFO L225 Difference]: With dead ends: 6521 [2021-06-12 15:32:27,847 INFO L226 Difference]: Without dead ends: 6251 [2021-06-12 15:32:27,847 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 757.2ms TimeCoverageRelationStatistics Valid=1054, Invalid=3368, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:32:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2021-06-12 15:32:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 4928. [2021-06-12 15:32:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:27,902 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:27,902 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:27,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:27,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:27,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:27,906 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:28,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:28,107 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:28,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:28,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1541613489, now seen corresponding path program 283 times [2021-06-12 15:32:28,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:28,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674529485] [2021-06-12 15:32:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:28,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:28,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674529485] [2021-06-12 15:32:28,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674529485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:28,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495419845] [2021-06-12 15:32:28,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:28,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:28,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:28,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495419845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:28,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:28,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:28,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630805744] [2021-06-12 15:32:28,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:28,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:28,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:28,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:28,612 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:29,512 INFO L93 Difference]: Finished difference Result 6471 states and 17097 transitions. [2021-06-12 15:32:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:32:29,512 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:29,518 INFO L225 Difference]: With dead ends: 6471 [2021-06-12 15:32:29,519 INFO L226 Difference]: Without dead ends: 6201 [2021-06-12 15:32:29,519 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 898.3ms TimeCoverageRelationStatistics Valid=1171, Invalid=3799, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:32:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2021-06-12 15:32:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 4928. [2021-06-12 15:32:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:29,572 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:29,572 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:29,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:29,576 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:29,577 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:29,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:29,777 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1978434781, now seen corresponding path program 284 times [2021-06-12 15:32:29,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:29,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335837482] [2021-06-12 15:32:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:30,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:30,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335837482] [2021-06-12 15:32:30,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335837482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:30,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180450822] [2021-06-12 15:32:30,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:30,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:30,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:30,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:30,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:30,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180450822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:30,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:30,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282797709] [2021-06-12 15:32:30,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:30,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:30,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:30,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:30,241 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:30,959 INFO L93 Difference]: Finished difference Result 6421 states and 16997 transitions. [2021-06-12 15:32:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:32:30,960 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:30,966 INFO L225 Difference]: With dead ends: 6421 [2021-06-12 15:32:30,966 INFO L226 Difference]: Without dead ends: 6151 [2021-06-12 15:32:30,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 730.3ms TimeCoverageRelationStatistics Valid=1134, Invalid=3558, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:32:30,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-06-12 15:32:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 4928. [2021-06-12 15:32:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:31,023 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:31,023 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:31,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:31,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:31,027 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:31,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:31,228 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:31,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1524521421, now seen corresponding path program 285 times [2021-06-12 15:32:31,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:31,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811501423] [2021-06-12 15:32:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:31,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:31,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811501423] [2021-06-12 15:32:31,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811501423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:31,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563460832] [2021-06-12 15:32:31,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:31,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:32:31,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:31,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 15:32:31,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:31,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563460832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:31,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:31,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:31,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075493144] [2021-06-12 15:32:31,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:31,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:31,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:31,761 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:32,618 INFO L93 Difference]: Finished difference Result 6371 states and 16897 transitions. [2021-06-12 15:32:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:32:32,618 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:32,624 INFO L225 Difference]: With dead ends: 6371 [2021-06-12 15:32:32,625 INFO L226 Difference]: Without dead ends: 6101 [2021-06-12 15:32:32,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 863.5ms TimeCoverageRelationStatistics Valid=1114, Invalid=3856, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:32:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2021-06-12 15:32:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 4928. [2021-06-12 15:32:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:32,682 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:32,683 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:32,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:32,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:32,687 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:32,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:32,887 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1892433957, now seen corresponding path program 286 times [2021-06-12 15:32:32,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:32,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936404578] [2021-06-12 15:32:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:33,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:33,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936404578] [2021-06-12 15:32:33,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936404578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:33,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301100129] [2021-06-12 15:32:33,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:33,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:33,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:33,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:33,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:33,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301100129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:33,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:33,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:33,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247751778] [2021-06-12 15:32:33,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:33,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:33,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:33,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:33,370 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:34,131 INFO L93 Difference]: Finished difference Result 6321 states and 16797 transitions. [2021-06-12 15:32:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:32:34,131 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:34,137 INFO L225 Difference]: With dead ends: 6321 [2021-06-12 15:32:34,137 INFO L226 Difference]: Without dead ends: 6051 [2021-06-12 15:32:34,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=1230, Invalid=3740, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:32:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-06-12 15:32:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 4928. [2021-06-12 15:32:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:34,193 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:34,193 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:34,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:34,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:34,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:34,197 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:34,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:34,398 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:34,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:34,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1502478539, now seen corresponding path program 287 times [2021-06-12 15:32:34,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:34,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490210589] [2021-06-12 15:32:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:34,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:34,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490210589] [2021-06-12 15:32:34,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490210589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:34,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838659707] [2021-06-12 15:32:34,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:34,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:32:34,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:34,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:34,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:34,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838659707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:34,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:34,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:34,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614846698] [2021-06-12 15:32:34,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:34,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:34,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:34,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:34,889 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:35,852 INFO L93 Difference]: Finished difference Result 6271 states and 16697 transitions. [2021-06-12 15:32:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:32:35,853 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:35,859 INFO L225 Difference]: With dead ends: 6271 [2021-06-12 15:32:35,859 INFO L226 Difference]: Without dead ends: 6001 [2021-06-12 15:32:35,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 973.4ms TimeCoverageRelationStatistics Valid=1363, Invalid=4187, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:32:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2021-06-12 15:32:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 4928. [2021-06-12 15:32:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:35,915 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:35,915 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:35,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:35,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:35,919 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:36,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:36,120 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:36,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1073414233, now seen corresponding path program 288 times [2021-06-12 15:32:36,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:36,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298750341] [2021-06-12 15:32:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:36,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:36,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298750341] [2021-06-12 15:32:36,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298750341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:36,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148051954] [2021-06-12 15:32:36,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:36,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:32:36,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:36,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:32:36,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:36,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148051954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:36,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:36,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:36,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370177731] [2021-06-12 15:32:36,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:36,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:36,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:36,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:36,613 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:37,503 INFO L93 Difference]: Finished difference Result 6221 states and 16597 transitions. [2021-06-12 15:32:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:32:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:37,509 INFO L225 Difference]: With dead ends: 6221 [2021-06-12 15:32:37,509 INFO L226 Difference]: Without dead ends: 5951 [2021-06-12 15:32:37,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=1342, Invalid=3914, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:32:37,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-06-12 15:32:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4928. [2021-06-12 15:32:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:37,564 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:37,564 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:37,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:37,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:37,568 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:37,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:37,769 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:37,769 INFO L82 PathProgramCache]: Analyzing trace with hash 387231049, now seen corresponding path program 289 times [2021-06-12 15:32:37,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:37,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036114398] [2021-06-12 15:32:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:37,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:37,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036114398] [2021-06-12 15:32:37,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036114398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:37,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121335930] [2021-06-12 15:32:37,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:38,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:38,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121335930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:38,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:38,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:38,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850686660] [2021-06-12 15:32:38,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:38,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:38,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:38,246 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:39,301 INFO L93 Difference]: Finished difference Result 6171 states and 16497 transitions. [2021-06-12 15:32:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:32:39,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:39,306 INFO L225 Difference]: With dead ends: 6171 [2021-06-12 15:32:39,307 INFO L226 Difference]: Without dead ends: 5901 [2021-06-12 15:32:39,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1006.8ms TimeCoverageRelationStatistics Valid=1483, Invalid=4369, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:32:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-12 15:32:39,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 4928. [2021-06-12 15:32:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:39,360 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:39,360 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:39,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:39,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:39,364 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:39,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:39,565 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 302196311, now seen corresponding path program 290 times [2021-06-12 15:32:39,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:39,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935393414] [2021-06-12 15:32:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:39,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:39,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935393414] [2021-06-12 15:32:39,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935393414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:39,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562067076] [2021-06-12 15:32:39,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:39,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:39,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:39,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:40,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562067076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:40,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:40,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:40,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789570735] [2021-06-12 15:32:40,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:40,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:40,035 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:40,913 INFO L93 Difference]: Finished difference Result 6121 states and 16397 transitions. [2021-06-12 15:32:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:32:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:40,917 INFO L225 Difference]: With dead ends: 6121 [2021-06-12 15:32:40,918 INFO L226 Difference]: Without dead ends: 5851 [2021-06-12 15:32:40,918 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 856.7ms TimeCoverageRelationStatistics Valid=1470, Invalid=4080, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:32:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2021-06-12 15:32:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 4928. [2021-06-12 15:32:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:40,969 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:40,969 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:40,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:40,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:40,974 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:41,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-12 15:32:41,174 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:41,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:41,174 INFO L82 PathProgramCache]: Analyzing trace with hash 234045255, now seen corresponding path program 291 times [2021-06-12 15:32:41,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:41,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702540165] [2021-06-12 15:32:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:41,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:41,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702540165] [2021-06-12 15:32:41,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702540165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:41,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57986074] [2021-06-12 15:32:41,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:41,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:32:41,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:41,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:32:41,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:41,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57986074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:41,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:41,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:41,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404259792] [2021-06-12 15:32:41,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:41,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:41,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:41,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:41,659 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:42,667 INFO L93 Difference]: Finished difference Result 6071 states and 16297 transitions. [2021-06-12 15:32:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:32:42,668 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:42,674 INFO L225 Difference]: With dead ends: 6071 [2021-06-12 15:32:42,674 INFO L226 Difference]: Without dead ends: 5801 [2021-06-12 15:32:42,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 982.3ms TimeCoverageRelationStatistics Valid=1393, Invalid=4459, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:32:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-12 15:32:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4928. [2021-06-12 15:32:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:42,756 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:42,756 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:42,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:42,757 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:42,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:42,760 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:42,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:42,960 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1062923819, now seen corresponding path program 292 times [2021-06-12 15:32:42,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:42,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464098839] [2021-06-12 15:32:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:43,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:43,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464098839] [2021-06-12 15:32:43,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464098839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:43,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983271574] [2021-06-12 15:32:43,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:43,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:43,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:43,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:43,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:43,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983271574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:43,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:43,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:43,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157021439] [2021-06-12 15:32:43,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:43,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:43,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:43,417 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:44,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:44,313 INFO L93 Difference]: Finished difference Result 6021 states and 16197 transitions. [2021-06-12 15:32:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:32:44,313 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:44,319 INFO L225 Difference]: With dead ends: 6021 [2021-06-12 15:32:44,319 INFO L226 Difference]: Without dead ends: 5751 [2021-06-12 15:32:44,320 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 866.6ms TimeCoverageRelationStatistics Valid=1614, Invalid=4238, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:32:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-06-12 15:32:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 4928. [2021-06-12 15:32:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-12 15:32:44,372 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-12 15:32:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:44,373 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-12 15:32:44,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-12 15:32:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:44,377 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:44,377 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:44,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-12 15:32:44,577 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:44,577 INFO L82 PathProgramCache]: Analyzing trace with hash -633170235, now seen corresponding path program 293 times [2021-06-12 15:32:44,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:44,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289005537] [2021-06-12 15:32:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:44,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:44,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289005537] [2021-06-12 15:32:44,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289005537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:44,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063144868] [2021-06-12 15:32:44,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:44,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:32:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:44,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:45,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063144868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:45,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:45,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:45,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973451256] [2021-06-12 15:32:45,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:45,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:45,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:45,067 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:46,247 INFO L93 Difference]: Finished difference Result 6479 states and 17463 transitions. [2021-06-12 15:32:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:32:46,247 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:46,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:46,253 INFO L225 Difference]: With dead ends: 6479 [2021-06-12 15:32:46,253 INFO L226 Difference]: Without dead ends: 5856 [2021-06-12 15:32:46,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 1140.1ms TimeCoverageRelationStatistics Valid=1794, Invalid=5012, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:32:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5856 states. [2021-06-12 15:32:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5856 to 4838. [2021-06-12 15:32:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 2.8215836262145957) internal successors, (13648), 4837 states have internal predecessors, (13648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 13648 transitions. [2021-06-12 15:32:46,316 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 13648 transitions. Word has length 150 [2021-06-12 15:32:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:46,316 INFO L482 AbstractCegarLoop]: Abstraction has 4838 states and 13648 transitions. [2021-06-12 15:32:46,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 13648 transitions. [2021-06-12 15:32:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:46,320 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:46,320 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:46,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-12 15:32:46,521 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:46,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:46,521 INFO L82 PathProgramCache]: Analyzing trace with hash -690904365, now seen corresponding path program 294 times [2021-06-12 15:32:46,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:46,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554388903] [2021-06-12 15:32:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:46,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:46,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554388903] [2021-06-12 15:32:46,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554388903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:46,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337159380] [2021-06-12 15:32:46,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:46,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:32:46,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:46,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:32:46,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:47,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337159380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:47,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:47,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:47,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186750371] [2021-06-12 15:32:47,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:47,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:47,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:47,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:47,007 INFO L87 Difference]: Start difference. First operand 4838 states and 13648 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:47,943 INFO L93 Difference]: Finished difference Result 6708 states and 18181 transitions. [2021-06-12 15:32:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:32:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:47,950 INFO L225 Difference]: With dead ends: 6708 [2021-06-12 15:32:47,951 INFO L226 Difference]: Without dead ends: 6438 [2021-06-12 15:32:47,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 930.6ms TimeCoverageRelationStatistics Valid=1775, Invalid=4387, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:32:47,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-06-12 15:32:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 5018. [2021-06-12 15:32:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5017 states have (on average 2.8317719752840342) internal successors, (14207), 5017 states have internal predecessors, (14207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 14207 transitions. [2021-06-12 15:32:48,013 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 14207 transitions. Word has length 150 [2021-06-12 15:32:48,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:48,013 INFO L482 AbstractCegarLoop]: Abstraction has 5018 states and 14207 transitions. [2021-06-12 15:32:48,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 14207 transitions. [2021-06-12 15:32:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:48,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:48,017 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:48,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-12 15:32:48,218 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:48,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:48,218 INFO L82 PathProgramCache]: Analyzing trace with hash -668561115, now seen corresponding path program 295 times [2021-06-12 15:32:48,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:48,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111746452] [2021-06-12 15:32:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:48,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:48,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111746452] [2021-06-12 15:32:48,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111746452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:48,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516843627] [2021-06-12 15:32:48,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:48,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:48,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:48,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516843627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:48,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:48,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:48,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975391746] [2021-06-12 15:32:48,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:48,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:48,722 INFO L87 Difference]: Start difference. First operand 5018 states and 14207 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:49,844 INFO L93 Difference]: Finished difference Result 6195 states and 16881 transitions. [2021-06-12 15:32:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:32:49,844 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-12 15:32:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:49,850 INFO L225 Difference]: With dead ends: 6195 [2021-06-12 15:32:49,850 INFO L226 Difference]: Without dead ends: 5706 [2021-06-12 15:32:49,851 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1125.6ms TimeCoverageRelationStatistics Valid=1911, Invalid=4731, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:32:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5706 states. [2021-06-12 15:32:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5706 to 3313. [2021-06-12 15:32:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.7409420289855073) internal successors, (9078), 3312 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9078 transitions. [2021-06-12 15:32:49,895 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9078 transitions. Word has length 150 [2021-06-12 15:32:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:49,896 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9078 transitions. [2021-06-12 15:32:49,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9078 transitions. [2021-06-12 15:32:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:32:49,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:49,898 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:50,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:50,099 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:50,099 INFO L82 PathProgramCache]: Analyzing trace with hash 771249274, now seen corresponding path program 296 times [2021-06-12 15:32:50,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:50,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298844372] [2021-06-12 15:32:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:50,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:50,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298844372] [2021-06-12 15:32:50,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298844372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:50,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891392946] [2021-06-12 15:32:50,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:50,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:50,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:50,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:32:50,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:50,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891392946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:50,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:50,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:32:50,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475432050] [2021-06-12 15:32:50,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:50,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:50,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:50,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:50,647 INFO L87 Difference]: Start difference. First operand 3313 states and 9078 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:51,192 INFO L93 Difference]: Finished difference Result 4931 states and 12517 transitions. [2021-06-12 15:32:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:32:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:32:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:51,197 INFO L225 Difference]: With dead ends: 4931 [2021-06-12 15:32:51,197 INFO L226 Difference]: Without dead ends: 4661 [2021-06-12 15:32:51,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 636.1ms TimeCoverageRelationStatistics Valid=935, Invalid=2605, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:32:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-12 15:32:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3388. [2021-06-12 15:32:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.746678476527901) internal successors, (9303), 3387 states have internal predecessors, (9303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9303 transitions. [2021-06-12 15:32:51,236 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9303 transitions. Word has length 155 [2021-06-12 15:32:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:51,236 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9303 transitions. [2021-06-12 15:32:51,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9303 transitions. [2021-06-12 15:32:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:32:51,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:51,239 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:51,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-12 15:32:51,439 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:51,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1654301034, now seen corresponding path program 297 times [2021-06-12 15:32:51,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:51,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685032529] [2021-06-12 15:32:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:51,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:51,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685032529] [2021-06-12 15:32:51,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685032529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:51,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277363191] [2021-06-12 15:32:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:51,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:32:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:51,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:32:51,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:52,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277363191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:52,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:52,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:32:52,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971854725] [2021-06-12 15:32:52,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:52,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:52,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:52,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:52,019 INFO L87 Difference]: Start difference. First operand 3388 states and 9303 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:52,615 INFO L93 Difference]: Finished difference Result 5551 states and 13832 transitions. [2021-06-12 15:32:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:32:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:32:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:52,619 INFO L225 Difference]: With dead ends: 5551 [2021-06-12 15:32:52,619 INFO L226 Difference]: Without dead ends: 5281 [2021-06-12 15:32:52,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 710.1ms TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:32:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5281 states. [2021-06-12 15:32:52,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5281 to 3463. [2021-06-12 15:32:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.752166377816291) internal successors, (9528), 3462 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9528 transitions. [2021-06-12 15:32:52,659 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9528 transitions. Word has length 155 [2021-06-12 15:32:52,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:52,660 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9528 transitions. [2021-06-12 15:32:52,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9528 transitions. [2021-06-12 15:32:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:32:52,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:52,662 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:52,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:52,863 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:52,863 INFO L82 PathProgramCache]: Analyzing trace with hash -237908360, now seen corresponding path program 298 times [2021-06-12 15:32:52,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:52,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182255122] [2021-06-12 15:32:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:53,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:53,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182255122] [2021-06-12 15:32:53,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182255122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:53,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819901438] [2021-06-12 15:32:53,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:53,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:53,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:53,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:32:53,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:53,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819901438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:53,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:53,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:32:53,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295040] [2021-06-12 15:32:53,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:53,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:53,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:53,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:53,417 INFO L87 Difference]: Start difference. First operand 3463 states and 9528 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:53,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:53,987 INFO L93 Difference]: Finished difference Result 5581 states and 13967 transitions. [2021-06-12 15:32:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:32:53,987 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:32:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:53,992 INFO L225 Difference]: With dead ends: 5581 [2021-06-12 15:32:53,993 INFO L226 Difference]: Without dead ends: 5311 [2021-06-12 15:32:53,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 701.1ms TimeCoverageRelationStatistics Valid=991, Invalid=2915, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:32:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2021-06-12 15:32:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 3538. [2021-06-12 15:32:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.757421543681086) internal successors, (9753), 3537 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9753 transitions. [2021-06-12 15:32:54,036 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9753 transitions. Word has length 155 [2021-06-12 15:32:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:54,036 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9753 transitions. [2021-06-12 15:32:54,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9753 transitions. [2021-06-12 15:32:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:32:54,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:54,039 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:54,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:54,239 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:54,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1603438440, now seen corresponding path program 299 times [2021-06-12 15:32:54,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:54,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699944539] [2021-06-12 15:32:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:54,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:54,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699944539] [2021-06-12 15:32:54,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699944539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:54,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885882667] [2021-06-12 15:32:54,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:54,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:32:54,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:54,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:32:54,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:54,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885882667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:54,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:54,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:32:54,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511496372] [2021-06-12 15:32:54,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:54,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:54,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:54,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:54,803 INFO L87 Difference]: Start difference. First operand 3538 states and 9753 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:55,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:55,456 INFO L93 Difference]: Finished difference Result 5606 states and 14092 transitions. [2021-06-12 15:32:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:32:55,457 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:32:55,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:55,461 INFO L225 Difference]: With dead ends: 5606 [2021-06-12 15:32:55,462 INFO L226 Difference]: Without dead ends: 5336 [2021-06-12 15:32:55,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 763.0ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:32:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2021-06-12 15:32:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 3613. [2021-06-12 15:32:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.762458471760797) internal successors, (9978), 3612 states have internal predecessors, (9978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 9978 transitions. [2021-06-12 15:32:55,506 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 9978 transitions. Word has length 155 [2021-06-12 15:32:55,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:55,506 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 9978 transitions. [2021-06-12 15:32:55,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:55,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 9978 transitions. [2021-06-12 15:32:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:32:55,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:55,510 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:55,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:55,710 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1809969674, now seen corresponding path program 300 times [2021-06-12 15:32:55,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:55,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641002648] [2021-06-12 15:32:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:55,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:55,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641002648] [2021-06-12 15:32:55,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641002648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:55,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681946593] [2021-06-12 15:32:55,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:56,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:32:56,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:32:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:56,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681946593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:56,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:56,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:32:56,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510798824] [2021-06-12 15:32:56,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:56,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:56,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:56,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:56,249 INFO L87 Difference]: Start difference. First operand 3613 states and 9978 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:56,861 INFO L93 Difference]: Finished difference Result 5631 states and 14217 transitions. [2021-06-12 15:32:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:32:56,862 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:32:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:56,867 INFO L225 Difference]: With dead ends: 5631 [2021-06-12 15:32:56,867 INFO L226 Difference]: Without dead ends: 5361 [2021-06-12 15:32:56,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 684.8ms TimeCoverageRelationStatistics Valid=1021, Invalid=3139, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:32:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-12 15:32:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 3688. [2021-06-12 15:32:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.7672904800650935) internal successors, (10203), 3687 states have internal predecessors, (10203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10203 transitions. [2021-06-12 15:32:56,912 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10203 transitions. Word has length 155 [2021-06-12 15:32:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:56,912 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10203 transitions. [2021-06-12 15:32:56,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10203 transitions. [2021-06-12 15:32:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:32:56,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:56,915 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:57,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-12 15:32:57,116 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1842623206, now seen corresponding path program 301 times [2021-06-12 15:32:57,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:57,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87089157] [2021-06-12 15:32:57,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:57,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:57,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87089157] [2021-06-12 15:32:57,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87089157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:57,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105979966] [2021-06-12 15:32:57,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:57,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:32:57,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:57,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105979966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:57,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:57,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:32:57,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151460773] [2021-06-12 15:32:57,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:57,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:57,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:57,656 INFO L87 Difference]: Start difference. First operand 3688 states and 10203 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:58,381 INFO L93 Difference]: Finished difference Result 5656 states and 14342 transitions. [2021-06-12 15:32:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:32:58,381 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:32:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:58,386 INFO L225 Difference]: With dead ends: 5656 [2021-06-12 15:32:58,386 INFO L226 Difference]: Without dead ends: 5386 [2021-06-12 15:32:58,386 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=1045, Invalid=3377, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:32:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5386 states. [2021-06-12 15:32:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5386 to 3763. [2021-06-12 15:32:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.7719298245614037) internal successors, (10428), 3762 states have internal predecessors, (10428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10428 transitions. [2021-06-12 15:32:58,431 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10428 transitions. Word has length 155 [2021-06-12 15:32:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:58,431 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10428 transitions. [2021-06-12 15:32:58,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10428 transitions. [2021-06-12 15:32:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:32:58,435 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:58,435 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:32:58,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-12 15:32:58,635 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:58,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1796076276, now seen corresponding path program 302 times [2021-06-12 15:32:58,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:58,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765296085] [2021-06-12 15:32:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:58,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:58,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765296085] [2021-06-12 15:32:58,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765296085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:58,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028027066] [2021-06-12 15:32:58,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:58,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:58,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:32:58,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:32:59,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028027066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:59,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:59,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:32:59,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586286508] [2021-06-12 15:32:59,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:59,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:59,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:59,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:59,146 INFO L87 Difference]: Start difference. First operand 3763 states and 10428 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:59,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:59,801 INFO L93 Difference]: Finished difference Result 5681 states and 14467 transitions. [2021-06-12 15:32:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:32:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:32:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:59,807 INFO L225 Difference]: With dead ends: 5681 [2021-06-12 15:32:59,807 INFO L226 Difference]: Without dead ends: 5411 [2021-06-12 15:32:59,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 707.1ms TimeCoverageRelationStatistics Valid=1067, Invalid=3355, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:32:59,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2021-06-12 15:32:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 3838. [2021-06-12 15:32:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.776387802971071) internal successors, (10653), 3837 states have internal predecessors, (10653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10653 transitions. [2021-06-12 15:32:59,854 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10653 transitions. Word has length 155 [2021-06-12 15:32:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:59,854 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10653 transitions. [2021-06-12 15:32:59,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10653 transitions. [2021-06-12 15:32:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:32:59,857 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:59,858 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:00,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-12 15:33:00,058 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:00,058 INFO L82 PathProgramCache]: Analyzing trace with hash 877691876, now seen corresponding path program 303 times [2021-06-12 15:33:00,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:00,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569874635] [2021-06-12 15:33:00,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:00,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:00,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569874635] [2021-06-12 15:33:00,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569874635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:00,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939362299] [2021-06-12 15:33:00,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:00,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:33:00,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:00,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 15:33:00,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:00,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939362299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:00,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:00,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:00,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709464797] [2021-06-12 15:33:00,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:00,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:00,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:00,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:00,633 INFO L87 Difference]: Start difference. First operand 3838 states and 10653 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:01,384 INFO L93 Difference]: Finished difference Result 5706 states and 14592 transitions. [2021-06-12 15:33:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:33:01,384 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:01,389 INFO L225 Difference]: With dead ends: 5706 [2021-06-12 15:33:01,389 INFO L226 Difference]: Without dead ends: 5436 [2021-06-12 15:33:01,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 813.3ms TimeCoverageRelationStatistics Valid=1072, Invalid=3620, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:33:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2021-06-12 15:33:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 3913. [2021-06-12 15:33:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.7806748466257667) internal successors, (10878), 3912 states have internal predecessors, (10878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10878 transitions. [2021-06-12 15:33:01,438 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10878 transitions. Word has length 155 [2021-06-12 15:33:01,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:01,438 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10878 transitions. [2021-06-12 15:33:01,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:01,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10878 transitions. [2021-06-12 15:33:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:01,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:01,441 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:01,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-12 15:33:01,642 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash -898998926, now seen corresponding path program 304 times [2021-06-12 15:33:01,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:01,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151872102] [2021-06-12 15:33:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:01,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:01,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151872102] [2021-06-12 15:33:01,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151872102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:01,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366029899] [2021-06-12 15:33:01,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:01,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:01,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:01,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:02,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366029899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:02,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:02,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:02,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132466861] [2021-06-12 15:33:02,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:02,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:02,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:02,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:02,154 INFO L87 Difference]: Start difference. First operand 3913 states and 10878 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:02,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:02,835 INFO L93 Difference]: Finished difference Result 5731 states and 14717 transitions. [2021-06-12 15:33:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:33:02,836 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:02,841 INFO L225 Difference]: With dead ends: 5731 [2021-06-12 15:33:02,841 INFO L226 Difference]: Without dead ends: 5461 [2021-06-12 15:33:02,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 732.0ms TimeCoverageRelationStatistics Valid=1129, Invalid=3563, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:33:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-12 15:33:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3988. [2021-06-12 15:33:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 2.7848006019563583) internal successors, (11103), 3987 states have internal predecessors, (11103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11103 transitions. [2021-06-12 15:33:02,891 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11103 transitions. Word has length 155 [2021-06-12 15:33:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:02,891 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11103 transitions. [2021-06-12 15:33:02,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11103 transitions. [2021-06-12 15:33:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:02,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:02,895 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:03,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-12 15:33:03,095 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:03,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:03,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1200642658, now seen corresponding path program 305 times [2021-06-12 15:33:03,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:03,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625523690] [2021-06-12 15:33:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:03,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:03,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625523690] [2021-06-12 15:33:03,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625523690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:03,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525150803] [2021-06-12 15:33:03,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:03,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:33:03,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:03,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:03,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525150803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:03,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:03,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:03,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142280673] [2021-06-12 15:33:03,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:03,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:03,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:03,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:03,628 INFO L87 Difference]: Start difference. First operand 3988 states and 11103 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:04,442 INFO L93 Difference]: Finished difference Result 5756 states and 14842 transitions. [2021-06-12 15:33:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:33:04,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:04,448 INFO L225 Difference]: With dead ends: 5756 [2021-06-12 15:33:04,448 INFO L226 Difference]: Without dead ends: 5486 [2021-06-12 15:33:04,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 862.2ms TimeCoverageRelationStatistics Valid=1157, Invalid=3813, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:33:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-06-12 15:33:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 4063. [2021-06-12 15:33:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 4062 states have (on average 2.78877400295421) internal successors, (11328), 4062 states have internal predecessors, (11328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11328 transitions. [2021-06-12 15:33:04,497 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11328 transitions. Word has length 155 [2021-06-12 15:33:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:04,497 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11328 transitions. [2021-06-12 15:33:04,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:04,497 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11328 transitions. [2021-06-12 15:33:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:04,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:04,501 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:04,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-12 15:33:04,701 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1584124560, now seen corresponding path program 306 times [2021-06-12 15:33:04,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:04,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720474300] [2021-06-12 15:33:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:04,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:04,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720474300] [2021-06-12 15:33:04,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720474300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:04,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491361365] [2021-06-12 15:33:04,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:05,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:33:05,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:05,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:05,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:05,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491361365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:05,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:05,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:05,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032029061] [2021-06-12 15:33:05,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:05,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:05,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:05,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:05,195 INFO L87 Difference]: Start difference. First operand 4063 states and 11328 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:05,939 INFO L93 Difference]: Finished difference Result 5781 states and 14967 transitions. [2021-06-12 15:33:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:33:05,939 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:05,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:05,943 INFO L225 Difference]: With dead ends: 5781 [2021-06-12 15:33:05,943 INFO L226 Difference]: Without dead ends: 5511 [2021-06-12 15:33:05,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 775.1ms TimeCoverageRelationStatistics Valid=1207, Invalid=3763, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:33:05,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-12 15:33:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 4138. [2021-06-12 15:33:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.792603335750544) internal successors, (11553), 4137 states have internal predecessors, (11553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11553 transitions. [2021-06-12 15:33:05,991 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11553 transitions. Word has length 155 [2021-06-12 15:33:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:05,991 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11553 transitions. [2021-06-12 15:33:05,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11553 transitions. [2021-06-12 15:33:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:05,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:05,995 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:06,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-12 15:33:06,195 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash -944466336, now seen corresponding path program 307 times [2021-06-12 15:33:06,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:06,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979197389] [2021-06-12 15:33:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:06,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:06,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979197389] [2021-06-12 15:33:06,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979197389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:06,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183388085] [2021-06-12 15:33:06,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:06,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:06,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183388085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:06,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:06,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:06,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259283275] [2021-06-12 15:33:06,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:06,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:06,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:06,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:06,698 INFO L87 Difference]: Start difference. First operand 4138 states and 11553 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:07,697 INFO L93 Difference]: Finished difference Result 5806 states and 15092 transitions. [2021-06-12 15:33:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:33:07,698 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:07,704 INFO L225 Difference]: With dead ends: 5806 [2021-06-12 15:33:07,704 INFO L226 Difference]: Without dead ends: 5536 [2021-06-12 15:33:07,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 957.7ms TimeCoverageRelationStatistics Valid=1237, Invalid=4019, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:33:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2021-06-12 15:33:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 4213. [2021-06-12 15:33:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.7962962962962963) internal successors, (11778), 4212 states have internal predecessors, (11778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11778 transitions. [2021-06-12 15:33:07,769 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11778 transitions. Word has length 155 [2021-06-12 15:33:07,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:07,769 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 11778 transitions. [2021-06-12 15:33:07,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11778 transitions. [2021-06-12 15:33:07,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:07,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:07,772 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:07,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:07,977 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:07,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:07,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1719385362, now seen corresponding path program 308 times [2021-06-12 15:33:07,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:07,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334730493] [2021-06-12 15:33:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:08,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:08,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334730493] [2021-06-12 15:33:08,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334730493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:08,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855748552] [2021-06-12 15:33:08,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:08,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:08,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:08,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:08,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:08,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855748552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:08,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:08,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:08,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923314599] [2021-06-12 15:33:08,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:08,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:08,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:08,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:08,450 INFO L87 Difference]: Start difference. First operand 4213 states and 11778 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:09,256 INFO L93 Difference]: Finished difference Result 5831 states and 15217 transitions. [2021-06-12 15:33:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:33:09,257 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:09,263 INFO L225 Difference]: With dead ends: 5831 [2021-06-12 15:33:09,263 INFO L226 Difference]: Without dead ends: 5561 [2021-06-12 15:33:09,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 788.3ms TimeCoverageRelationStatistics Valid=1301, Invalid=3955, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:33:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-12 15:33:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 4288. [2021-06-12 15:33:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 4287 states have (on average 2.7998600419874036) internal successors, (12003), 4287 states have internal predecessors, (12003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 12003 transitions. [2021-06-12 15:33:09,317 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 12003 transitions. Word has length 155 [2021-06-12 15:33:09,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:09,317 INFO L482 AbstractCegarLoop]: Abstraction has 4288 states and 12003 transitions. [2021-06-12 15:33:09,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 12003 transitions. [2021-06-12 15:33:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:09,321 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:09,321 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:09,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-12 15:33:09,521 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:09,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:09,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2121668574, now seen corresponding path program 309 times [2021-06-12 15:33:09,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:09,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612144664] [2021-06-12 15:33:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:09,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:09,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612144664] [2021-06-12 15:33:09,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612144664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:09,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236162823] [2021-06-12 15:33:09,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:09,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:33:09,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:09,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 15:33:09,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:10,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236162823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:10,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:10,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:10,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53875782] [2021-06-12 15:33:10,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:10,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:10,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:10,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:10,077 INFO L87 Difference]: Start difference. First operand 4288 states and 12003 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:10,999 INFO L93 Difference]: Finished difference Result 5856 states and 15342 transitions. [2021-06-12 15:33:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:33:10,999 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:11,005 INFO L225 Difference]: With dead ends: 5856 [2021-06-12 15:33:11,005 INFO L226 Difference]: Without dead ends: 5586 [2021-06-12 15:33:11,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 950.1ms TimeCoverageRelationStatistics Valid=1267, Invalid=4283, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:33:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-06-12 15:33:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 4363. [2021-06-12 15:33:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 2.8033012379642366) internal successors, (12228), 4362 states have internal predecessors, (12228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 12228 transitions. [2021-06-12 15:33:11,060 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 12228 transitions. Word has length 155 [2021-06-12 15:33:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:11,060 INFO L482 AbstractCegarLoop]: Abstraction has 4363 states and 12228 transitions. [2021-06-12 15:33:11,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:11,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 12228 transitions. [2021-06-12 15:33:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:11,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:11,063 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:11,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:11,265 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1295286804, now seen corresponding path program 310 times [2021-06-12 15:33:11,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:11,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367821908] [2021-06-12 15:33:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:11,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:11,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367821908] [2021-06-12 15:33:11,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367821908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:11,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178745154] [2021-06-12 15:33:11,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:11,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:11,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:11,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:11,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:11,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178745154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:11,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:11,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:11,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262140421] [2021-06-12 15:33:11,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:11,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:11,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:11,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:11,774 INFO L87 Difference]: Start difference. First operand 4363 states and 12228 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:12,579 INFO L93 Difference]: Finished difference Result 5881 states and 15467 transitions. [2021-06-12 15:33:12,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:33:12,579 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:12,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:12,585 INFO L225 Difference]: With dead ends: 5881 [2021-06-12 15:33:12,585 INFO L226 Difference]: Without dead ends: 5611 [2021-06-12 15:33:12,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 817.8ms TimeCoverageRelationStatistics Valid=1411, Invalid=4139, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:33:12,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2021-06-12 15:33:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 4438. [2021-06-12 15:33:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4438 states, 4437 states have (on average 2.8066260987153484) internal successors, (12453), 4437 states have internal predecessors, (12453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4438 states to 4438 states and 12453 transitions. [2021-06-12 15:33:12,639 INFO L78 Accepts]: Start accepts. Automaton has 4438 states and 12453 transitions. Word has length 155 [2021-06-12 15:33:12,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:12,640 INFO L482 AbstractCegarLoop]: Abstraction has 4438 states and 12453 transitions. [2021-06-12 15:33:12,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4438 states and 12453 transitions. [2021-06-12 15:33:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:12,643 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:12,643 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:12,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-12 15:33:12,844 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:12,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:12,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2099625692, now seen corresponding path program 311 times [2021-06-12 15:33:12,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:12,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115732749] [2021-06-12 15:33:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:13,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:13,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115732749] [2021-06-12 15:33:13,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115732749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:13,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722273620] [2021-06-12 15:33:13,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:13,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:33:13,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:13,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:13,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722273620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:13,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:13,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:13,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271506408] [2021-06-12 15:33:13,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:13,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:13,331 INFO L87 Difference]: Start difference. First operand 4438 states and 12453 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:14,384 INFO L93 Difference]: Finished difference Result 5906 states and 15592 transitions. [2021-06-12 15:33:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:33:14,384 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:14,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:14,390 INFO L225 Difference]: With dead ends: 5906 [2021-06-12 15:33:14,390 INFO L226 Difference]: Without dead ends: 5636 [2021-06-12 15:33:14,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 971.7ms TimeCoverageRelationStatistics Valid=1445, Invalid=4407, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:33:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-06-12 15:33:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 4513. [2021-06-12 15:33:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4512 states have (on average 2.809840425531915) internal successors, (12678), 4512 states have internal predecessors, (12678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 12678 transitions. [2021-06-12 15:33:14,446 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 12678 transitions. Word has length 155 [2021-06-12 15:33:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:14,446 INFO L482 AbstractCegarLoop]: Abstraction has 4513 states and 12678 transitions. [2021-06-12 15:33:14,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 12678 transitions. [2021-06-12 15:33:14,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:14,449 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:14,450 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:14,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:14,650 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:14,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1670561386, now seen corresponding path program 312 times [2021-06-12 15:33:14,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:14,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362643648] [2021-06-12 15:33:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:14,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:14,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362643648] [2021-06-12 15:33:14,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362643648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:14,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124974405] [2021-06-12 15:33:14,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:14,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:33:14,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:14,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:33:14,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:15,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124974405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:15,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:15,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:15,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533565011] [2021-06-12 15:33:15,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:15,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:15,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:15,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:15,122 INFO L87 Difference]: Start difference. First operand 4513 states and 12678 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:16,005 INFO L93 Difference]: Finished difference Result 5931 states and 15717 transitions. [2021-06-12 15:33:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:33:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:16,011 INFO L225 Difference]: With dead ends: 5931 [2021-06-12 15:33:16,011 INFO L226 Difference]: Without dead ends: 5661 [2021-06-12 15:33:16,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 848.3ms TimeCoverageRelationStatistics Valid=1537, Invalid=4315, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:33:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-12 15:33:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 4588. [2021-06-12 15:33:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4587 states have (on average 2.8129496402877696) internal successors, (12903), 4587 states have internal predecessors, (12903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 12903 transitions. [2021-06-12 15:33:16,067 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 12903 transitions. Word has length 155 [2021-06-12 15:33:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:16,067 INFO L482 AbstractCegarLoop]: Abstraction has 4588 states and 12903 transitions. [2021-06-12 15:33:16,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:16,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 12903 transitions. [2021-06-12 15:33:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:16,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:16,071 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:16,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:16,272 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash 984378202, now seen corresponding path program 313 times [2021-06-12 15:33:16,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:16,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988268467] [2021-06-12 15:33:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:16,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:16,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988268467] [2021-06-12 15:33:16,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988268467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:16,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884821304] [2021-06-12 15:33:16,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:16,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:16,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:16,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884821304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:16,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:16,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:16,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935256583] [2021-06-12 15:33:16,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:16,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:16,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:16,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:16,761 INFO L87 Difference]: Start difference. First operand 4588 states and 12903 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:17,815 INFO L93 Difference]: Finished difference Result 5956 states and 15842 transitions. [2021-06-12 15:33:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:33:17,815 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:17,820 INFO L225 Difference]: With dead ends: 5956 [2021-06-12 15:33:17,821 INFO L226 Difference]: Without dead ends: 5686 [2021-06-12 15:33:17,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1032.7ms TimeCoverageRelationStatistics Valid=1573, Invalid=4589, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:33:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-12 15:33:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4663. [2021-06-12 15:33:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 2.815958815958816) internal successors, (13128), 4662 states have internal predecessors, (13128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 13128 transitions. [2021-06-12 15:33:17,878 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 13128 transitions. Word has length 155 [2021-06-12 15:33:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:17,878 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 13128 transitions. [2021-06-12 15:33:17,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 13128 transitions. [2021-06-12 15:33:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:17,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:17,882 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:18,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-12 15:33:18,083 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:18,083 INFO L82 PathProgramCache]: Analyzing trace with hash 899343464, now seen corresponding path program 314 times [2021-06-12 15:33:18,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:18,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178898781] [2021-06-12 15:33:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:18,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:18,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178898781] [2021-06-12 15:33:18,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178898781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:18,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260151031] [2021-06-12 15:33:18,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:18,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:18,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:18,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:18,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:18,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260151031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:18,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:18,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:18,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028998760] [2021-06-12 15:33:18,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:18,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:18,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:18,577 INFO L87 Difference]: Start difference. First operand 4663 states and 13128 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:19,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:19,488 INFO L93 Difference]: Finished difference Result 5981 states and 15967 transitions. [2021-06-12 15:33:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:33:19,489 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:19,494 INFO L225 Difference]: With dead ends: 5981 [2021-06-12 15:33:19,494 INFO L226 Difference]: Without dead ends: 5711 [2021-06-12 15:33:19,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 884.0ms TimeCoverageRelationStatistics Valid=1679, Invalid=4483, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:33:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-12 15:33:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4738. [2021-06-12 15:33:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 4737 states have (on average 2.818872704243192) internal successors, (13353), 4737 states have internal predecessors, (13353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 13353 transitions. [2021-06-12 15:33:19,556 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 13353 transitions. Word has length 155 [2021-06-12 15:33:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:19,556 INFO L482 AbstractCegarLoop]: Abstraction has 4738 states and 13353 transitions. [2021-06-12 15:33:19,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 13353 transitions. [2021-06-12 15:33:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:19,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:19,560 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:19,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-12 15:33:19,760 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:19,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:19,761 INFO L82 PathProgramCache]: Analyzing trace with hash 831192408, now seen corresponding path program 315 times [2021-06-12 15:33:19,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:19,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940955581] [2021-06-12 15:33:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:20,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:20,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940955581] [2021-06-12 15:33:20,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940955581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:20,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309794357] [2021-06-12 15:33:20,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:20,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:33:20,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:20,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:33:20,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:20,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309794357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:20,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:20,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977911604] [2021-06-12 15:33:20,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:20,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:20,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:20,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:20,253 INFO L87 Difference]: Start difference. First operand 4738 states and 13353 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:21,397 INFO L93 Difference]: Finished difference Result 6006 states and 16092 transitions. [2021-06-12 15:33:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:33:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:21,402 INFO L225 Difference]: With dead ends: 6006 [2021-06-12 15:33:21,402 INFO L226 Difference]: Without dead ends: 5736 [2021-06-12 15:33:21,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 1090.5ms TimeCoverageRelationStatistics Valid=1579, Invalid=4901, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:33:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-12 15:33:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 4813. [2021-06-12 15:33:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 2.821695760598504) internal successors, (13578), 4812 states have internal predecessors, (13578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 13578 transitions. [2021-06-12 15:33:21,458 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 13578 transitions. Word has length 155 [2021-06-12 15:33:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:21,458 INFO L482 AbstractCegarLoop]: Abstraction has 4813 states and 13578 transitions. [2021-06-12 15:33:21,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 13578 transitions. [2021-06-12 15:33:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:21,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:21,462 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:21,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-12 15:33:21,663 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:21,663 INFO L82 PathProgramCache]: Analyzing trace with hash -465776666, now seen corresponding path program 316 times [2021-06-12 15:33:21,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:21,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376786437] [2021-06-12 15:33:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:21,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:21,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376786437] [2021-06-12 15:33:21,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376786437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:21,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967137888] [2021-06-12 15:33:21,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:21,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:21,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:22,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967137888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:22,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:22,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:22,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132834658] [2021-06-12 15:33:22,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:22,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:22,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:22,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:22,159 INFO L87 Difference]: Start difference. First operand 4813 states and 13578 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:23,103 INFO L93 Difference]: Finished difference Result 6031 states and 16217 transitions. [2021-06-12 15:33:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:33:23,103 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:23,109 INFO L225 Difference]: With dead ends: 6031 [2021-06-12 15:33:23,109 INFO L226 Difference]: Without dead ends: 5761 [2021-06-12 15:33:23,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 931.4ms TimeCoverageRelationStatistics Valid=1837, Invalid=4643, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:33:23,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-12 15:33:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4888. [2021-06-12 15:33:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 2.824432166973603) internal successors, (13803), 4887 states have internal predecessors, (13803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 13803 transitions. [2021-06-12 15:33:23,184 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 13803 transitions. Word has length 155 [2021-06-12 15:33:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:23,185 INFO L482 AbstractCegarLoop]: Abstraction has 4888 states and 13803 transitions. [2021-06-12 15:33:23,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 13803 transitions. [2021-06-12 15:33:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:23,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:23,189 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:23,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-12 15:33:23,389 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:23,390 INFO L82 PathProgramCache]: Analyzing trace with hash -36023082, now seen corresponding path program 317 times [2021-06-12 15:33:23,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:23,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729477780] [2021-06-12 15:33:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:23,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729477780] [2021-06-12 15:33:23,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729477780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689791182] [2021-06-12 15:33:23,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:23,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:33:23,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:23,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:23,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:23,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689791182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:23,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:23,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:23,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172033696] [2021-06-12 15:33:23,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:23,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:23,882 INFO L87 Difference]: Start difference. First operand 4888 states and 13803 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:25,043 INFO L93 Difference]: Finished difference Result 6116 states and 16507 transitions. [2021-06-12 15:33:25,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:33:25,044 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:25,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:25,050 INFO L225 Difference]: With dead ends: 6116 [2021-06-12 15:33:25,050 INFO L226 Difference]: Without dead ends: 5846 [2021-06-12 15:33:25,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 1125.5ms TimeCoverageRelationStatistics Valid=1877, Invalid=4929, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:33:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-06-12 15:33:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 4963. [2021-06-12 15:33:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4963 states, 4962 states have (on average 2.8311164852881903) internal successors, (14048), 4962 states have internal predecessors, (14048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 14048 transitions. [2021-06-12 15:33:25,127 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 14048 transitions. Word has length 155 [2021-06-12 15:33:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:25,127 INFO L482 AbstractCegarLoop]: Abstraction has 4963 states and 14048 transitions. [2021-06-12 15:33:25,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 14048 transitions. [2021-06-12 15:33:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:25,131 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:25,131 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:25,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:25,332 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:25,332 INFO L82 PathProgramCache]: Analyzing trace with hash -93757212, now seen corresponding path program 318 times [2021-06-12 15:33:25,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:25,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246938607] [2021-06-12 15:33:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:25,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:25,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246938607] [2021-06-12 15:33:25,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246938607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:25,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790492001] [2021-06-12 15:33:25,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:25,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:33:25,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:25,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:25,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:25,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790492001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:25,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:25,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:25,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444362615] [2021-06-12 15:33:25,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:25,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:25,815 INFO L87 Difference]: Start difference. First operand 4963 states and 14048 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:26,794 INFO L93 Difference]: Finished difference Result 6858 states and 18631 transitions. [2021-06-12 15:33:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:33:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:26,801 INFO L225 Difference]: With dead ends: 6858 [2021-06-12 15:33:26,801 INFO L226 Difference]: Without dead ends: 6588 [2021-06-12 15:33:26,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 946.2ms TimeCoverageRelationStatistics Valid=2012, Invalid=4794, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:33:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6588 states. [2021-06-12 15:33:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6588 to 5143. [2021-06-12 15:33:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5143 states, 5142 states have (on average 2.8407234539089847) internal successors, (14607), 5142 states have internal predecessors, (14607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 14607 transitions. [2021-06-12 15:33:26,864 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 14607 transitions. Word has length 155 [2021-06-12 15:33:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:26,864 INFO L482 AbstractCegarLoop]: Abstraction has 5143 states and 14607 transitions. [2021-06-12 15:33:26,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 14607 transitions. [2021-06-12 15:33:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:26,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:26,868 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:27,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-12 15:33:27,069 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash -71413962, now seen corresponding path program 319 times [2021-06-12 15:33:27,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:27,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359931599] [2021-06-12 15:33:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:27,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:27,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359931599] [2021-06-12 15:33:27,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359931599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:27,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896957676] [2021-06-12 15:33:27,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:27,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:27,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:27,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896957676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:27,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:27,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:27,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605057282] [2021-06-12 15:33:27,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:27,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:27,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:27,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:27,589 INFO L87 Difference]: Start difference. First operand 5143 states and 14607 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:28,738 INFO L93 Difference]: Finished difference Result 6320 states and 17281 transitions. [2021-06-12 15:33:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:33:28,739 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-12 15:33:28,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:28,745 INFO L225 Difference]: With dead ends: 6320 [2021-06-12 15:33:28,745 INFO L226 Difference]: Without dead ends: 5831 [2021-06-12 15:33:28,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 1138.0ms TimeCoverageRelationStatistics Valid=2056, Invalid=5084, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:33:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2021-06-12 15:33:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 3234. [2021-06-12 15:33:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 2.74234457160532) internal successors, (8866), 3233 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 8866 transitions. [2021-06-12 15:33:28,788 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 8866 transitions. Word has length 155 [2021-06-12 15:33:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:28,789 INFO L482 AbstractCegarLoop]: Abstraction has 3234 states and 8866 transitions. [2021-06-12 15:33:28,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 8866 transitions. [2021-06-12 15:33:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:28,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:28,791 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:28,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:28,991 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -842046282, now seen corresponding path program 320 times [2021-06-12 15:33:28,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:28,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44992326] [2021-06-12 15:33:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:29,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:29,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44992326] [2021-06-12 15:33:29,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44992326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:29,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401032961] [2021-06-12 15:33:29,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:29,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:29,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:29,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:33:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:29,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401032961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:29,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:29,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2021-06-12 15:33:29,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564297323] [2021-06-12 15:33:29,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:33:29,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:29,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:33:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:33:29,620 INFO L87 Difference]: Start difference. First operand 3234 states and 8866 transitions. Second operand has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:30,248 INFO L93 Difference]: Finished difference Result 4524 states and 11766 transitions. [2021-06-12 15:33:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:33:30,248 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:30,252 INFO L225 Difference]: With dead ends: 4524 [2021-06-12 15:33:30,252 INFO L226 Difference]: Without dead ends: 4190 [2021-06-12 15:33:30,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 755.3ms TimeCoverageRelationStatistics Valid=1165, Invalid=3125, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:33:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4190 states. [2021-06-12 15:33:30,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4190 to 3319. [2021-06-12 15:33:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 2.7233273056057867) internal successors, (9036), 3318 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 9036 transitions. [2021-06-12 15:33:30,289 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 9036 transitions. Word has length 160 [2021-06-12 15:33:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:30,289 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 9036 transitions. [2021-06-12 15:33:30,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 9036 transitions. [2021-06-12 15:33:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:30,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:30,291 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:30,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-12 15:33:30,492 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1096521818, now seen corresponding path program 321 times [2021-06-12 15:33:30,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:30,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560508736] [2021-06-12 15:33:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:30,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:30,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560508736] [2021-06-12 15:33:30,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560508736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:30,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547364169] [2021-06-12 15:33:30,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:30,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:33:30,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:30,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:30,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:31,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547364169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:31,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:31,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:31,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148855157] [2021-06-12 15:33:31,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:31,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:31,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:31,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:31,087 INFO L87 Difference]: Start difference. First operand 3319 states and 9036 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:31,610 INFO L93 Difference]: Finished difference Result 5746 states and 14147 transitions. [2021-06-12 15:33:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:33:31,611 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:31,616 INFO L225 Difference]: With dead ends: 5746 [2021-06-12 15:33:31,616 INFO L226 Difference]: Without dead ends: 5476 [2021-06-12 15:33:31,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=988, Invalid=2552, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:33:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-12 15:33:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 3463. [2021-06-12 15:33:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7305025996533794) internal successors, (9453), 3462 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9453 transitions. [2021-06-12 15:33:31,659 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9453 transitions. Word has length 160 [2021-06-12 15:33:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:31,659 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9453 transitions. [2021-06-12 15:33:31,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9453 transitions. [2021-06-12 15:33:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:31,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:31,662 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:31,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:31,862 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash 251033930, now seen corresponding path program 322 times [2021-06-12 15:33:31,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:31,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628722828] [2021-06-12 15:33:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:32,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:32,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628722828] [2021-06-12 15:33:32,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628722828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:32,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002967811] [2021-06-12 15:33:32,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:32,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:32,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:32,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:32,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:32,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002967811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:32,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:32,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:32,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593557444] [2021-06-12 15:33:32,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:32,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:32,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:32,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:32,452 INFO L87 Difference]: Start difference. First operand 3463 states and 9453 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:33,080 INFO L93 Difference]: Finished difference Result 5706 states and 14142 transitions. [2021-06-12 15:33:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:33:33,081 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:33,085 INFO L225 Difference]: With dead ends: 5706 [2021-06-12 15:33:33,085 INFO L226 Difference]: Without dead ends: 5436 [2021-06-12 15:33:33,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 773.0ms TimeCoverageRelationStatistics Valid=1067, Invalid=2965, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:33:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2021-06-12 15:33:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 3538. [2021-06-12 15:33:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.736217133163698) internal successors, (9678), 3537 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9678 transitions. [2021-06-12 15:33:33,125 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9678 transitions. Word has length 160 [2021-06-12 15:33:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:33,125 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9678 transitions. [2021-06-12 15:33:33,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9678 transitions. [2021-06-12 15:33:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:33,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:33,128 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:33,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-12 15:33:33,328 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:33,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1654969128, now seen corresponding path program 323 times [2021-06-12 15:33:33,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:33,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266912387] [2021-06-12 15:33:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:33,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:33,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266912387] [2021-06-12 15:33:33,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266912387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:33,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475966066] [2021-06-12 15:33:33,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:33,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:33:33,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:33,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:33,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:33,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475966066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:33,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:33,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:33,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82757779] [2021-06-12 15:33:33,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:33,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:33,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:33,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:33,895 INFO L87 Difference]: Start difference. First operand 3538 states and 9678 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:34,460 INFO L93 Difference]: Finished difference Result 5756 states and 14317 transitions. [2021-06-12 15:33:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:33:34,461 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:34,466 INFO L225 Difference]: With dead ends: 5756 [2021-06-12 15:33:34,466 INFO L226 Difference]: Without dead ends: 5486 [2021-06-12 15:33:34,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 694.1ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:33:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-06-12 15:33:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 3613. [2021-06-12 15:33:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.7416943521594686) internal successors, (9903), 3612 states have internal predecessors, (9903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 9903 transitions. [2021-06-12 15:33:34,510 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 9903 transitions. Word has length 160 [2021-06-12 15:33:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:34,510 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 9903 transitions. [2021-06-12 15:33:34,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 9903 transitions. [2021-06-12 15:33:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:34,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:34,513 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:34,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-12 15:33:34,714 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:34,714 INFO L82 PathProgramCache]: Analyzing trace with hash -771917368, now seen corresponding path program 324 times [2021-06-12 15:33:34,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:34,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747977579] [2021-06-12 15:33:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:35,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:35,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747977579] [2021-06-12 15:33:35,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747977579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:35,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333149361] [2021-06-12 15:33:35,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:35,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:33:35,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:35,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:35,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:35,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333149361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:35,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:35,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:35,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64539454] [2021-06-12 15:33:35,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:35,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:35,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:35,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:35,324 INFO L87 Difference]: Start difference. First operand 3613 states and 9903 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:36,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:36,013 INFO L93 Difference]: Finished difference Result 5781 states and 14442 transitions. [2021-06-12 15:33:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:33:36,014 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:36,019 INFO L225 Difference]: With dead ends: 5781 [2021-06-12 15:33:36,019 INFO L226 Difference]: Without dead ends: 5511 [2021-06-12 15:33:36,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 813.1ms TimeCoverageRelationStatistics Valid=1074, Invalid=3216, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:33:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-12 15:33:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3688. [2021-06-12 15:33:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.7469487388120424) internal successors, (10128), 3687 states have internal predecessors, (10128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10128 transitions. [2021-06-12 15:33:36,065 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10128 transitions. Word has length 160 [2021-06-12 15:33:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:36,065 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10128 transitions. [2021-06-12 15:33:36,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10128 transitions. [2021-06-12 15:33:36,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:36,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:36,068 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:36,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:36,268 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:36,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1630840534, now seen corresponding path program 325 times [2021-06-12 15:33:36,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:36,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794480843] [2021-06-12 15:33:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:36,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:36,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794480843] [2021-06-12 15:33:36,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794480843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:36,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123083460] [2021-06-12 15:33:36,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:36,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:36,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:36,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123083460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:36,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:36,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:36,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680432511] [2021-06-12 15:33:36,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:36,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:36,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:36,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:36,834 INFO L87 Difference]: Start difference. First operand 3688 states and 10128 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:37,483 INFO L93 Difference]: Finished difference Result 5806 states and 14567 transitions. [2021-06-12 15:33:37,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:33:37,483 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:37,489 INFO L225 Difference]: With dead ends: 5806 [2021-06-12 15:33:37,489 INFO L226 Difference]: Without dead ends: 5536 [2021-06-12 15:33:37,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 722.1ms TimeCoverageRelationStatistics Valid=1002, Invalid=3030, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:33:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2021-06-12 15:33:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 3763. [2021-06-12 15:33:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.751993620414673) internal successors, (10353), 3762 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10353 transitions. [2021-06-12 15:33:37,535 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10353 transitions. Word has length 160 [2021-06-12 15:33:37,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:37,535 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10353 transitions. [2021-06-12 15:33:37,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10353 transitions. [2021-06-12 15:33:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:37,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:37,538 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:37,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-12 15:33:37,739 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:37,739 INFO L82 PathProgramCache]: Analyzing trace with hash -822779962, now seen corresponding path program 326 times [2021-06-12 15:33:37,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:37,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156348778] [2021-06-12 15:33:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:38,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:38,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156348778] [2021-06-12 15:33:38,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156348778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:38,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716712644] [2021-06-12 15:33:38,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:38,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:38,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:38,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:38,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:38,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716712644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:38,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:38,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:38,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106769516] [2021-06-12 15:33:38,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:38,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:38,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:38,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:38,352 INFO L87 Difference]: Start difference. First operand 3763 states and 10353 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:39,180 INFO L93 Difference]: Finished difference Result 5831 states and 14692 transitions. [2021-06-12 15:33:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:33:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:39,186 INFO L225 Difference]: With dead ends: 5831 [2021-06-12 15:33:39,186 INFO L226 Difference]: Without dead ends: 5561 [2021-06-12 15:33:39,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 904.0ms TimeCoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:33:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-12 15:33:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3838. [2021-06-12 15:33:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.7568412822517594) internal successors, (10578), 3837 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10578 transitions. [2021-06-12 15:33:39,237 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10578 transitions. Word has length 160 [2021-06-12 15:33:39,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:39,237 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10578 transitions. [2021-06-12 15:33:39,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10578 transitions. [2021-06-12 15:33:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:39,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:39,240 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:39,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-12 15:33:39,457 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:39,457 INFO L82 PathProgramCache]: Analyzing trace with hash 58779220, now seen corresponding path program 327 times [2021-06-12 15:33:39,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:39,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303747919] [2021-06-12 15:33:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:39,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:39,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303747919] [2021-06-12 15:33:39,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303747919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:39,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110043384] [2021-06-12 15:33:39,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:39,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:33:39,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:39,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 15:33:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:39,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110043384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:39,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:39,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:39,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169830760] [2021-06-12 15:33:39,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:39,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:39,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:39,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:39,987 INFO L87 Difference]: Start difference. First operand 3838 states and 10578 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:40,689 INFO L93 Difference]: Finished difference Result 5856 states and 14817 transitions. [2021-06-12 15:33:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:33:40,689 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:40,694 INFO L225 Difference]: With dead ends: 5856 [2021-06-12 15:33:40,694 INFO L226 Difference]: Without dead ends: 5586 [2021-06-12 15:33:40,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 754.4ms TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:33:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-06-12 15:33:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 3913. [2021-06-12 15:33:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.7615030674846626) internal successors, (10803), 3912 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10803 transitions. [2021-06-12 15:33:40,738 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10803 transitions. Word has length 160 [2021-06-12 15:33:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:40,738 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10803 transitions. [2021-06-12 15:33:40,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10803 transitions. [2021-06-12 15:33:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:40,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:40,741 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:40,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-12 15:33:40,942 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash -583595196, now seen corresponding path program 328 times [2021-06-12 15:33:40,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:40,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029215015] [2021-06-12 15:33:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:41,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:41,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029215015] [2021-06-12 15:33:41,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029215015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:41,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419064503] [2021-06-12 15:33:41,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:41,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:41,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:41,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:41,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:41,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419064503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:41,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:41,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:41,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670814461] [2021-06-12 15:33:41,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:41,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:41,493 INFO L87 Difference]: Start difference. First operand 3913 states and 10803 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:42,306 INFO L93 Difference]: Finished difference Result 5881 states and 14942 transitions. [2021-06-12 15:33:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:33:42,307 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:42,312 INFO L225 Difference]: With dead ends: 5881 [2021-06-12 15:33:42,312 INFO L226 Difference]: Without dead ends: 5611 [2021-06-12 15:33:42,313 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 863.4ms TimeCoverageRelationStatistics Valid=1136, Invalid=3694, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:33:42,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2021-06-12 15:33:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 3988. [2021-06-12 15:33:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 2.7659894657637323) internal successors, (11028), 3987 states have internal predecessors, (11028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11028 transitions. [2021-06-12 15:33:42,363 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11028 transitions. Word has length 160 [2021-06-12 15:33:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:42,363 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11028 transitions. [2021-06-12 15:33:42,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11028 transitions. [2021-06-12 15:33:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:42,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:42,366 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:42,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-12 15:33:42,567 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash -630142126, now seen corresponding path program 329 times [2021-06-12 15:33:42,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:42,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150899163] [2021-06-12 15:33:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:42,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:42,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150899163] [2021-06-12 15:33:42,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150899163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:42,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081969129] [2021-06-12 15:33:42,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:42,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:33:42,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:42,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:42,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:43,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081969129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:43,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:43,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:43,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075044439] [2021-06-12 15:33:43,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:43,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:43,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:43,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:43,107 INFO L87 Difference]: Start difference. First operand 3988 states and 11028 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:43,847 INFO L93 Difference]: Finished difference Result 5906 states and 15067 transitions. [2021-06-12 15:33:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:33:43,847 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:43,853 INFO L225 Difference]: With dead ends: 5906 [2021-06-12 15:33:43,853 INFO L226 Difference]: Without dead ends: 5636 [2021-06-12 15:33:43,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 760.3ms TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:33:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-06-12 15:33:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 4063. [2021-06-12 15:33:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 4062 states have (on average 2.7703101920236337) internal successors, (11253), 4062 states have internal predecessors, (11253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11253 transitions. [2021-06-12 15:33:43,904 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11253 transitions. Word has length 160 [2021-06-12 15:33:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:43,904 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11253 transitions. [2021-06-12 15:33:43,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11253 transitions. [2021-06-12 15:33:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:43,908 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:43,908 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:44,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-12 15:33:44,108 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1548526526, now seen corresponding path program 330 times [2021-06-12 15:33:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:44,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484033638] [2021-06-12 15:33:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:44,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:44,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484033638] [2021-06-12 15:33:44,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484033638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:44,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964488887] [2021-06-12 15:33:44,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:44,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:33:44,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:44,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:44,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:44,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964488887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:44,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:44,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:44,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29790580] [2021-06-12 15:33:44,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:44,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:44,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:44,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:44,690 INFO L87 Difference]: Start difference. First operand 4063 states and 11253 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:45,566 INFO L93 Difference]: Finished difference Result 5931 states and 15192 transitions. [2021-06-12 15:33:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:33:45,566 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:45,572 INFO L225 Difference]: With dead ends: 5931 [2021-06-12 15:33:45,572 INFO L226 Difference]: Without dead ends: 5661 [2021-06-12 15:33:45,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 893.9ms TimeCoverageRelationStatistics Valid=1191, Invalid=3921, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:33:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-12 15:33:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 4138. [2021-06-12 15:33:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.774474256707759) internal successors, (11478), 4137 states have internal predecessors, (11478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11478 transitions. [2021-06-12 15:33:45,623 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11478 transitions. Word has length 160 [2021-06-12 15:33:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:45,623 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11478 transitions. [2021-06-12 15:33:45,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:45,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11478 transitions. [2021-06-12 15:33:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:45,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:45,626 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:45,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:45,827 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash 969749968, now seen corresponding path program 331 times [2021-06-12 15:33:45,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:45,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970895966] [2021-06-12 15:33:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:46,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:46,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970895966] [2021-06-12 15:33:46,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970895966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:46,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550628231] [2021-06-12 15:33:46,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:46,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:46,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:46,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550628231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:46,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:46,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:46,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375175206] [2021-06-12 15:33:46,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:46,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:46,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:46,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:46,351 INFO L87 Difference]: Start difference. First operand 4138 states and 11478 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:47,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:47,097 INFO L93 Difference]: Finished difference Result 5956 states and 15317 transitions. [2021-06-12 15:33:47,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:33:47,097 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:47,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:47,103 INFO L225 Difference]: With dead ends: 5956 [2021-06-12 15:33:47,103 INFO L226 Difference]: Without dead ends: 5686 [2021-06-12 15:33:47,103 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 779.3ms TimeCoverageRelationStatistics Valid=1143, Invalid=3687, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:33:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-12 15:33:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4213. [2021-06-12 15:33:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.7784900284900287) internal successors, (11703), 4212 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11703 transitions. [2021-06-12 15:33:47,155 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11703 transitions. Word has length 160 [2021-06-12 15:33:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:47,155 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 11703 transitions. [2021-06-12 15:33:47,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11703 transitions. [2021-06-12 15:33:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:47,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:47,159 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:47,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:47,359 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:47,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1225575744, now seen corresponding path program 332 times [2021-06-12 15:33:47,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:47,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394387933] [2021-06-12 15:33:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:47,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:47,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394387933] [2021-06-12 15:33:47,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394387933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:47,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071784614] [2021-06-12 15:33:47,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:47,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:47,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:47,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:47,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:47,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071784614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:47,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:47,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:47,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178630324] [2021-06-12 15:33:47,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:47,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:47,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:47,906 INFO L87 Difference]: Start difference. First operand 4213 states and 11703 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:48,861 INFO L93 Difference]: Finished difference Result 5981 states and 15442 transitions. [2021-06-12 15:33:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:33:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:48,867 INFO L225 Difference]: With dead ends: 5981 [2021-06-12 15:33:48,867 INFO L226 Difference]: Without dead ends: 5711 [2021-06-12 15:33:48,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 979.7ms TimeCoverageRelationStatistics Valid=1262, Invalid=4140, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:33:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-12 15:33:48,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4288. [2021-06-12 15:33:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 4287 states have (on average 2.782365290412876) internal successors, (11928), 4287 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 11928 transitions. [2021-06-12 15:33:48,920 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 11928 transitions. Word has length 160 [2021-06-12 15:33:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:48,920 INFO L482 AbstractCegarLoop]: Abstraction has 4288 states and 11928 transitions. [2021-06-12 15:33:48,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 11928 transitions. [2021-06-12 15:33:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:48,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:48,924 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:49,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:49,125 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash 284624334, now seen corresponding path program 333 times [2021-06-12 15:33:49,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:49,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303237255] [2021-06-12 15:33:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:49,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:49,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303237255] [2021-06-12 15:33:49,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303237255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:49,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782953160] [2021-06-12 15:33:49,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:49,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:33:49,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:49,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 15:33:49,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:49,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782953160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:49,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:49,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:49,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017035172] [2021-06-12 15:33:49,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:49,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:49,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:49,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:49,645 INFO L87 Difference]: Start difference. First operand 4288 states and 11928 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:50,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:50,482 INFO L93 Difference]: Finished difference Result 6006 states and 15567 transitions. [2021-06-12 15:33:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:33:50,482 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:50,488 INFO L225 Difference]: With dead ends: 6006 [2021-06-12 15:33:50,488 INFO L226 Difference]: Without dead ends: 5736 [2021-06-12 15:33:50,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 842.0ms TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:33:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-12 15:33:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 4363. [2021-06-12 15:33:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 2.7861072902338377) internal successors, (12153), 4362 states have internal predecessors, (12153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 12153 transitions. [2021-06-12 15:33:50,541 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 12153 transitions. Word has length 160 [2021-06-12 15:33:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:50,541 INFO L482 AbstractCegarLoop]: Abstraction has 4363 states and 12153 transitions. [2021-06-12 15:33:50,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 12153 transitions. [2021-06-12 15:33:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:50,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:50,545 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:50,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:50,746 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:50,746 INFO L82 PathProgramCache]: Analyzing trace with hash 924282558, now seen corresponding path program 334 times [2021-06-12 15:33:50,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:50,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404457935] [2021-06-12 15:33:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:51,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:51,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404457935] [2021-06-12 15:33:51,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404457935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:51,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162954064] [2021-06-12 15:33:51,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:51,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:51,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:51,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:51,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:51,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162954064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:51,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:51,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:51,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382260290] [2021-06-12 15:33:51,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:51,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:51,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:51,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:51,288 INFO L87 Difference]: Start difference. First operand 4363 states and 12153 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:52,304 INFO L93 Difference]: Finished difference Result 6031 states and 15692 transitions. [2021-06-12 15:33:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:33:52,304 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:52,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:52,309 INFO L225 Difference]: With dead ends: 6031 [2021-06-12 15:33:52,309 INFO L226 Difference]: Without dead ends: 5761 [2021-06-12 15:33:52,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1018.5ms TimeCoverageRelationStatistics Valid=1349, Invalid=4351, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:33:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-12 15:33:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4438. [2021-06-12 15:33:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4438 states, 4437 states have (on average 2.7897227856659907) internal successors, (12378), 4437 states have internal predecessors, (12378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4438 states to 4438 states and 12378 transitions. [2021-06-12 15:33:52,360 INFO L78 Accepts]: Start accepts. Automaton has 4438 states and 12378 transitions. Word has length 160 [2021-06-12 15:33:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:52,360 INFO L482 AbstractCegarLoop]: Abstraction has 4438 states and 12378 transitions. [2021-06-12 15:33:52,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:52,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4438 states and 12378 transitions. [2021-06-12 15:33:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:52,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:52,364 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:52,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-12 15:33:52,565 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash 149363532, now seen corresponding path program 335 times [2021-06-12 15:33:52,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:52,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928160692] [2021-06-12 15:33:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:52,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:52,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928160692] [2021-06-12 15:33:52,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928160692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:52,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665464915] [2021-06-12 15:33:52,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:52,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:33:52,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:52,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:52,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:53,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665464915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:53,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:53,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:53,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373548330] [2021-06-12 15:33:53,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:53,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:53,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:53,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:53,069 INFO L87 Difference]: Start difference. First operand 4438 states and 12378 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:53,918 INFO L93 Difference]: Finished difference Result 6056 states and 15817 transitions. [2021-06-12 15:33:53,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:33:53,918 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:53,924 INFO L225 Difference]: With dead ends: 6056 [2021-06-12 15:33:53,924 INFO L226 Difference]: Without dead ends: 5786 [2021-06-12 15:33:53,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 843.9ms TimeCoverageRelationStatistics Valid=1317, Invalid=4085, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:33:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-12 15:33:53,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4513. [2021-06-12 15:33:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4512 states have (on average 2.793218085106383) internal successors, (12603), 4512 states have internal predecessors, (12603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 12603 transitions. [2021-06-12 15:33:53,991 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 12603 transitions. Word has length 160 [2021-06-12 15:33:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:53,991 INFO L482 AbstractCegarLoop]: Abstraction has 4513 states and 12603 transitions. [2021-06-12 15:33:53,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 12603 transitions. [2021-06-12 15:33:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:53,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:53,995 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:54,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-12 15:33:54,195 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:54,196 INFO L82 PathProgramCache]: Analyzing trace with hash -304549828, now seen corresponding path program 336 times [2021-06-12 15:33:54,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:54,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953975485] [2021-06-12 15:33:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:54,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:54,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953975485] [2021-06-12 15:33:54,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953975485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:54,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297069223] [2021-06-12 15:33:54,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:54,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:33:54,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:54,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 15:33:54,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:54,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297069223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:54,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:54,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:54,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304443916] [2021-06-12 15:33:54,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:54,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:54,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:54,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:54,711 INFO L87 Difference]: Start difference. First operand 4513 states and 12603 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:55,698 INFO L93 Difference]: Finished difference Result 6081 states and 15942 transitions. [2021-06-12 15:33:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:33:55,698 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:55,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:55,704 INFO L225 Difference]: With dead ends: 6081 [2021-06-12 15:33:55,704 INFO L226 Difference]: Without dead ends: 5811 [2021-06-12 15:33:55,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 962.9ms TimeCoverageRelationStatistics Valid=1280, Invalid=4420, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:33:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-06-12 15:33:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4588. [2021-06-12 15:33:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4587 states have (on average 2.7965990843688684) internal successors, (12828), 4587 states have internal predecessors, (12828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 12828 transitions. [2021-06-12 15:33:55,787 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 12828 transitions. Word has length 160 [2021-06-12 15:33:55,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:55,787 INFO L482 AbstractCegarLoop]: Abstraction has 4588 states and 12828 transitions. [2021-06-12 15:33:55,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 12828 transitions. [2021-06-12 15:33:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:55,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:55,791 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:55,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-12 15:33:55,991 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash 573462090, now seen corresponding path program 337 times [2021-06-12 15:33:55,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:55,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939207380] [2021-06-12 15:33:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:56,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:56,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939207380] [2021-06-12 15:33:56,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939207380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:56,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132114578] [2021-06-12 15:33:56,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:56,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:56,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:56,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132114578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:56,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:56,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:56,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732224635] [2021-06-12 15:33:56,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:56,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:56,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:56,478 INFO L87 Difference]: Start difference. First operand 4588 states and 12828 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:57,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:57,375 INFO L93 Difference]: Finished difference Result 6106 states and 16067 transitions. [2021-06-12 15:33:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:33:57,375 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:57,381 INFO L225 Difference]: With dead ends: 6106 [2021-06-12 15:33:57,381 INFO L226 Difference]: Without dead ends: 5836 [2021-06-12 15:33:57,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 868.6ms TimeCoverageRelationStatistics Valid=1428, Invalid=4272, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:33:57,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-12 15:33:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 4663. [2021-06-12 15:33:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 2.7998712998713) internal successors, (13053), 4662 states have internal predecessors, (13053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 13053 transitions. [2021-06-12 15:33:57,441 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 13053 transitions. Word has length 160 [2021-06-12 15:33:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:57,441 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 13053 transitions. [2021-06-12 15:33:57,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 13053 transitions. [2021-06-12 15:33:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:57,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:57,445 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:57,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-12 15:33:57,645 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:57,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:57,646 INFO L82 PathProgramCache]: Analyzing trace with hash -326592710, now seen corresponding path program 338 times [2021-06-12 15:33:57,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:57,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514948963] [2021-06-12 15:33:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:57,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:57,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514948963] [2021-06-12 15:33:57,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514948963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:57,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098704900] [2021-06-12 15:33:57,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:57,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:57,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:57,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:58,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098704900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:58,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:58,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:58,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102112831] [2021-06-12 15:33:58,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:58,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:58,173 INFO L87 Difference]: Start difference. First operand 4663 states and 13053 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:59,284 INFO L93 Difference]: Finished difference Result 6131 states and 16192 transitions. [2021-06-12 15:33:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:33:59,284 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:33:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:59,290 INFO L225 Difference]: With dead ends: 6131 [2021-06-12 15:33:59,291 INFO L226 Difference]: Without dead ends: 5861 [2021-06-12 15:33:59,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1098.0ms TimeCoverageRelationStatistics Valid=1571, Invalid=4749, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:33:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-12 15:33:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 4738. [2021-06-12 15:33:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 4737 states have (on average 2.803039898670044) internal successors, (13278), 4737 states have internal predecessors, (13278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 13278 transitions. [2021-06-12 15:33:59,352 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 13278 transitions. Word has length 160 [2021-06-12 15:33:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:59,352 INFO L482 AbstractCegarLoop]: Abstraction has 4738 states and 13278 transitions. [2021-06-12 15:33:59,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 13278 transitions. [2021-06-12 15:33:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:59,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:59,356 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:33:59,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:59,557 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:59,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:59,557 INFO L82 PathProgramCache]: Analyzing trace with hash -755657016, now seen corresponding path program 339 times [2021-06-12 15:33:59,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:59,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471863308] [2021-06-12 15:33:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:33:59,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:59,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471863308] [2021-06-12 15:33:59,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471863308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:59,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302650203] [2021-06-12 15:33:59,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:59,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:33:59,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:33:59,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:00,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302650203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:00,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:00,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:00,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573517969] [2021-06-12 15:34:00,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:00,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:00,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:00,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:00,071 INFO L87 Difference]: Start difference. First operand 4738 states and 13278 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:01,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:01,023 INFO L93 Difference]: Finished difference Result 6156 states and 16317 transitions. [2021-06-12 15:34:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:34:01,024 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:34:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:01,030 INFO L225 Difference]: With dead ends: 6156 [2021-06-12 15:34:01,030 INFO L226 Difference]: Without dead ends: 5886 [2021-06-12 15:34:01,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 926.0ms TimeCoverageRelationStatistics Valid=1555, Invalid=4451, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:34:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-12 15:34:01,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4813. [2021-06-12 15:34:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 2.8061097256857854) internal successors, (13503), 4812 states have internal predecessors, (13503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:01,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 13503 transitions. [2021-06-12 15:34:01,093 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 13503 transitions. Word has length 160 [2021-06-12 15:34:01,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:01,093 INFO L482 AbstractCegarLoop]: Abstraction has 4813 states and 13503 transitions. [2021-06-12 15:34:01,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 13503 transitions. [2021-06-12 15:34:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:01,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:01,097 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:01,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-12 15:34:01,298 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1441840200, now seen corresponding path program 340 times [2021-06-12 15:34:01,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:01,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088380744] [2021-06-12 15:34:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:01,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:01,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088380744] [2021-06-12 15:34:01,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088380744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:01,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917658508] [2021-06-12 15:34:01,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:01,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:01,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:01,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:01,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:01,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917658508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:01,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:01,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:01,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249604382] [2021-06-12 15:34:01,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:01,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:01,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:01,822 INFO L87 Difference]: Start difference. First operand 4813 states and 13503 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:03,005 INFO L93 Difference]: Finished difference Result 6181 states and 16442 transitions. [2021-06-12 15:34:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:34:03,006 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:34:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:03,012 INFO L225 Difference]: With dead ends: 6181 [2021-06-12 15:34:03,012 INFO L226 Difference]: Without dead ends: 5911 [2021-06-12 15:34:03,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1149.6ms TimeCoverageRelationStatistics Valid=1706, Invalid=4936, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:34:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-12 15:34:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4888. [2021-06-12 15:34:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 2.809085328422345) internal successors, (13728), 4887 states have internal predecessors, (13728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 13728 transitions. [2021-06-12 15:34:03,075 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 13728 transitions. Word has length 160 [2021-06-12 15:34:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:03,075 INFO L482 AbstractCegarLoop]: Abstraction has 4888 states and 13728 transitions. [2021-06-12 15:34:03,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 13728 transitions. [2021-06-12 15:34:03,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:03,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:03,079 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:03,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:03,280 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:03,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1526874938, now seen corresponding path program 341 times [2021-06-12 15:34:03,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:03,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354074104] [2021-06-12 15:34:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:03,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:03,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354074104] [2021-06-12 15:34:03,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354074104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:03,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660906822] [2021-06-12 15:34:03,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:03,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:03,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:03,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:03,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:03,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660906822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:03,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:03,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:03,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826514302] [2021-06-12 15:34:03,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:03,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:03,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:03,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:03,809 INFO L87 Difference]: Start difference. First operand 4888 states and 13728 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:04,849 INFO L93 Difference]: Finished difference Result 6206 states and 16567 transitions. [2021-06-12 15:34:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:34:04,849 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:34:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:04,855 INFO L225 Difference]: With dead ends: 6206 [2021-06-12 15:34:04,855 INFO L226 Difference]: Without dead ends: 5936 [2021-06-12 15:34:04,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 990.4ms TimeCoverageRelationStatistics Valid=1698, Invalid=4622, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:34:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-12 15:34:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4963. [2021-06-12 15:34:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4963 states, 4962 states have (on average 2.811970979443773) internal successors, (13953), 4962 states have internal predecessors, (13953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 13953 transitions. [2021-06-12 15:34:04,920 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 13953 transitions. Word has length 160 [2021-06-12 15:34:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:04,920 INFO L482 AbstractCegarLoop]: Abstraction has 4963 states and 13953 transitions. [2021-06-12 15:34:04,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:04,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 13953 transitions. [2021-06-12 15:34:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:04,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:04,924 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:05,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-12 15:34:05,125 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1595025994, now seen corresponding path program 342 times [2021-06-12 15:34:05,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:05,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814780841] [2021-06-12 15:34:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:05,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:05,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814780841] [2021-06-12 15:34:05,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814780841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:05,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856721691] [2021-06-12 15:34:05,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:05,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:34:05,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:05,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:34:05,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:05,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856721691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:05,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:05,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:05,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417207699] [2021-06-12 15:34:05,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:05,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:05,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:05,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:05,669 INFO L87 Difference]: Start difference. First operand 4963 states and 13953 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:06,870 INFO L93 Difference]: Finished difference Result 6231 states and 16692 transitions. [2021-06-12 15:34:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:34:06,871 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:34:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:06,877 INFO L225 Difference]: With dead ends: 6231 [2021-06-12 15:34:06,877 INFO L226 Difference]: Without dead ends: 5961 [2021-06-12 15:34:06,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1124.9ms TimeCoverageRelationStatistics Valid=1595, Invalid=5047, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:34:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-12 15:34:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 5038. [2021-06-12 15:34:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5038 states, 5037 states have (on average 2.8147706968433592) internal successors, (14178), 5037 states have internal predecessors, (14178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 14178 transitions. [2021-06-12 15:34:06,944 INFO L78 Accepts]: Start accepts. Automaton has 5038 states and 14178 transitions. Word has length 160 [2021-06-12 15:34:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:06,945 INFO L482 AbstractCegarLoop]: Abstraction has 5038 states and 14178 transitions. [2021-06-12 15:34:06,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:06,945 INFO L276 IsEmpty]: Start isEmpty. Operand 5038 states and 14178 transitions. [2021-06-12 15:34:06,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:06,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:06,949 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:07,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:07,166 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:07,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:07,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1402972228, now seen corresponding path program 343 times [2021-06-12 15:34:07,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:07,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508217492] [2021-06-12 15:34:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:07,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:07,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508217492] [2021-06-12 15:34:07,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508217492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:07,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143291928] [2021-06-12 15:34:07,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:07,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:07,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:07,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143291928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:07,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:07,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:07,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901484851] [2021-06-12 15:34:07,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:07,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:07,719 INFO L87 Difference]: Start difference. First operand 5038 states and 14178 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:08,803 INFO L93 Difference]: Finished difference Result 6256 states and 16817 transitions. [2021-06-12 15:34:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:34:08,803 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:34:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:08,809 INFO L225 Difference]: With dead ends: 6256 [2021-06-12 15:34:08,809 INFO L226 Difference]: Without dead ends: 5986 [2021-06-12 15:34:08,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 1046.3ms TimeCoverageRelationStatistics Valid=1857, Invalid=4785, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:34:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-12 15:34:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 5113. [2021-06-12 15:34:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 5112 states have (on average 2.817488262910798) internal successors, (14403), 5112 states have internal predecessors, (14403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 14403 transitions. [2021-06-12 15:34:08,876 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 14403 transitions. Word has length 160 [2021-06-12 15:34:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:08,876 INFO L482 AbstractCegarLoop]: Abstraction has 5113 states and 14403 transitions. [2021-06-12 15:34:08,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 14403 transitions. [2021-06-12 15:34:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:08,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:08,881 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:09,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:09,081 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:09,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:09,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1832725812, now seen corresponding path program 344 times [2021-06-12 15:34:09,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:09,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455514993] [2021-06-12 15:34:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:09,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:09,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455514993] [2021-06-12 15:34:09,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455514993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:09,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578476483] [2021-06-12 15:34:09,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:09,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:09,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:09,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:09,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578476483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:09,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:09,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:09,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651044923] [2021-06-12 15:34:09,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:09,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:09,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:09,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:09,648 INFO L87 Difference]: Start difference. First operand 5113 states and 14403 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:09,841 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-06-12 15:34:10,072 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 11 [2021-06-12 15:34:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:11,301 INFO L93 Difference]: Finished difference Result 6341 states and 17107 transitions. [2021-06-12 15:34:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:34:11,302 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:34:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:11,308 INFO L225 Difference]: With dead ends: 6341 [2021-06-12 15:34:11,308 INFO L226 Difference]: Without dead ends: 6071 [2021-06-12 15:34:11,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 1531.2ms TimeCoverageRelationStatistics Valid=2024, Invalid=5286, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 15:34:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6071 states. [2021-06-12 15:34:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6071 to 5188. [2021-06-12 15:34:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 5187 states have (on average 2.82398303450935) internal successors, (14648), 5187 states have internal predecessors, (14648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 14648 transitions. [2021-06-12 15:34:11,377 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 14648 transitions. Word has length 160 [2021-06-12 15:34:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:11,378 INFO L482 AbstractCegarLoop]: Abstraction has 5188 states and 14648 transitions. [2021-06-12 15:34:11,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 14648 transitions. [2021-06-12 15:34:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:11,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:11,382 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:11,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:11,583 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1774991682, now seen corresponding path program 345 times [2021-06-12 15:34:11,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:11,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336954444] [2021-06-12 15:34:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:11,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:11,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336954444] [2021-06-12 15:34:11,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336954444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:11,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433238921] [2021-06-12 15:34:11,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:11,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:11,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:11,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:12,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433238921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:12,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:12,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:12,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123774753] [2021-06-12 15:34:12,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:12,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:12,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:12,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:12,144 INFO L87 Difference]: Start difference. First operand 5188 states and 14648 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:13,226 INFO L93 Difference]: Finished difference Result 7108 states and 19281 transitions. [2021-06-12 15:34:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:34:13,226 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:34:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:13,233 INFO L225 Difference]: With dead ends: 7108 [2021-06-12 15:34:13,233 INFO L226 Difference]: Without dead ends: 6838 [2021-06-12 15:34:13,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1037.4ms TimeCoverageRelationStatistics Valid=2033, Invalid=4939, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:34:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2021-06-12 15:34:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 5368. [2021-06-12 15:34:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 2.8334264952487422) internal successors, (15207), 5367 states have internal predecessors, (15207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15207 transitions. [2021-06-12 15:34:13,298 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15207 transitions. Word has length 160 [2021-06-12 15:34:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:13,298 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15207 transitions. [2021-06-12 15:34:13,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15207 transitions. [2021-06-12 15:34:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:13,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:13,303 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:13,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-12 15:34:13,503 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:13,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1797334932, now seen corresponding path program 346 times [2021-06-12 15:34:13,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:13,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615722216] [2021-06-12 15:34:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:13,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:13,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615722216] [2021-06-12 15:34:13,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615722216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:13,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290666852] [2021-06-12 15:34:13,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:13,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:13,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:13,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:13,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:14,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290666852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:14,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:14,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:14,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533573923] [2021-06-12 15:34:14,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:14,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:14,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:14,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:14,039 INFO L87 Difference]: Start difference. First operand 5368 states and 15207 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:15,377 INFO L93 Difference]: Finished difference Result 6595 states and 17981 transitions. [2021-06-12 15:34:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:34:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-12 15:34:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:15,384 INFO L225 Difference]: With dead ends: 6595 [2021-06-12 15:34:15,384 INFO L226 Difference]: Without dead ends: 6106 [2021-06-12 15:34:15,385 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 1246.0ms TimeCoverageRelationStatistics Valid=2210, Invalid=5446, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:34:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-06-12 15:34:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 3513. [2021-06-12 15:34:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.7414578587699316) internal successors, (9628), 3512 states have internal predecessors, (9628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9628 transitions. [2021-06-12 15:34:15,441 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9628 transitions. Word has length 160 [2021-06-12 15:34:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:15,442 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9628 transitions. [2021-06-12 15:34:15,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9628 transitions. [2021-06-12 15:34:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:15,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:15,444 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:15,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-12 15:34:15,645 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1274170069, now seen corresponding path program 347 times [2021-06-12 15:34:15,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:15,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060716882] [2021-06-12 15:34:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:15,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:15,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060716882] [2021-06-12 15:34:15,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060716882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:15,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434703197] [2021-06-12 15:34:15,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:16,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:16,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:16,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:16,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434703197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:16,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:16,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:16,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709170077] [2021-06-12 15:34:16,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:16,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:16,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:16,227 INFO L87 Difference]: Start difference. First operand 3513 states and 9628 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:16,833 INFO L93 Difference]: Finished difference Result 5231 states and 13267 transitions. [2021-06-12 15:34:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:34:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:16,838 INFO L225 Difference]: With dead ends: 5231 [2021-06-12 15:34:16,838 INFO L226 Difference]: Without dead ends: 4961 [2021-06-12 15:34:16,839 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 724.9ms TimeCoverageRelationStatistics Valid=1074, Invalid=2958, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:34:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-12 15:34:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3588. [2021-06-12 15:34:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.7468636743797044) internal successors, (9853), 3587 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9853 transitions. [2021-06-12 15:34:16,879 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9853 transitions. Word has length 165 [2021-06-12 15:34:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:16,879 INFO L482 AbstractCegarLoop]: Abstraction has 3588 states and 9853 transitions. [2021-06-12 15:34:16,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9853 transitions. [2021-06-12 15:34:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:16,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:16,882 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:17,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-12 15:34:17,083 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:17,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2119657957, now seen corresponding path program 348 times [2021-06-12 15:34:17,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:17,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805313163] [2021-06-12 15:34:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:17,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:17,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805313163] [2021-06-12 15:34:17,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805313163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:17,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984210369] [2021-06-12 15:34:17,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:17,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:34:17,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:17,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:17,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:17,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984210369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:17,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:17,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:17,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291444645] [2021-06-12 15:34:17,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:17,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:17,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:17,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:17,737 INFO L87 Difference]: Start difference. First operand 3588 states and 9853 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:18,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:18,407 INFO L93 Difference]: Finished difference Result 5901 states and 14682 transitions. [2021-06-12 15:34:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:34:18,408 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:18,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:18,413 INFO L225 Difference]: With dead ends: 5901 [2021-06-12 15:34:18,413 INFO L226 Difference]: Without dead ends: 5631 [2021-06-12 15:34:18,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 823.1ms TimeCoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:34:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-06-12 15:34:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 3663. [2021-06-12 15:34:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.75204806116876) internal successors, (10078), 3662 states have internal predecessors, (10078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10078 transitions. [2021-06-12 15:34:18,462 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10078 transitions. Word has length 165 [2021-06-12 15:34:18,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:18,462 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10078 transitions. [2021-06-12 15:34:18,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10078 transitions. [2021-06-12 15:34:18,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:18,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:18,465 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:18,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:18,666 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:18,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:18,666 INFO L82 PathProgramCache]: Analyzing trace with hash 269306281, now seen corresponding path program 349 times [2021-06-12 15:34:18,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:18,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396055379] [2021-06-12 15:34:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:18,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:18,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396055379] [2021-06-12 15:34:18,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396055379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:18,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198654244] [2021-06-12 15:34:18,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:19,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:19,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198654244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:19,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:19,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:19,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636866526] [2021-06-12 15:34:19,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:19,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:19,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:19,288 INFO L87 Difference]: Start difference. First operand 3663 states and 10078 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:19,937 INFO L93 Difference]: Finished difference Result 5931 states and 14817 transitions. [2021-06-12 15:34:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:34:19,937 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:19,943 INFO L225 Difference]: With dead ends: 5931 [2021-06-12 15:34:19,943 INFO L226 Difference]: Without dead ends: 5661 [2021-06-12 15:34:19,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 751.8ms TimeCoverageRelationStatistics Valid=1131, Invalid=3291, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:34:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-12 15:34:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 3738. [2021-06-12 15:34:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.757024351083757) internal successors, (10303), 3737 states have internal predecessors, (10303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10303 transitions. [2021-06-12 15:34:19,988 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10303 transitions. Word has length 165 [2021-06-12 15:34:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:19,989 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10303 transitions. [2021-06-12 15:34:19,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10303 transitions. [2021-06-12 15:34:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:19,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:19,992 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:20,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-12 15:34:20,192 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:20,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:20,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1152358041, now seen corresponding path program 350 times [2021-06-12 15:34:20,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:20,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034418103] [2021-06-12 15:34:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:20,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:20,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034418103] [2021-06-12 15:34:20,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034418103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:20,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284202961] [2021-06-12 15:34:20,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:20,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:20,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:20,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:20,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:20,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284202961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:20,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:20,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:20,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884954556] [2021-06-12 15:34:20,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:20,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:20,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:20,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:20,809 INFO L87 Difference]: Start difference. First operand 3738 states and 10303 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:21,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:21,578 INFO L93 Difference]: Finished difference Result 5956 states and 14942 transitions. [2021-06-12 15:34:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:34:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:21,583 INFO L225 Difference]: With dead ends: 5956 [2021-06-12 15:34:21,583 INFO L226 Difference]: Without dead ends: 5686 [2021-06-12 15:34:21,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 861.4ms TimeCoverageRelationStatistics Valid=1153, Invalid=3539, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:34:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-12 15:34:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3813. [2021-06-12 15:34:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.7618048268625395) internal successors, (10528), 3812 states have internal predecessors, (10528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10528 transitions. [2021-06-12 15:34:21,631 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10528 transitions. Word has length 165 [2021-06-12 15:34:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:21,631 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10528 transitions. [2021-06-12 15:34:21,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10528 transitions. [2021-06-12 15:34:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:21,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:21,635 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:21,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:21,835 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:21,835 INFO L82 PathProgramCache]: Analyzing trace with hash -739851353, now seen corresponding path program 351 times [2021-06-12 15:34:21,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:21,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113866161] [2021-06-12 15:34:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:22,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:22,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113866161] [2021-06-12 15:34:22,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113866161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:22,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626477694] [2021-06-12 15:34:22,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:22,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:22,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:22,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-12 15:34:22,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:22,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626477694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:22,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:22,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:22,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323568039] [2021-06-12 15:34:22,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:22,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:22,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:22,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:22,405 INFO L87 Difference]: Start difference. First operand 3813 states and 10528 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:23,115 INFO L93 Difference]: Finished difference Result 5981 states and 15067 transitions. [2021-06-12 15:34:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:34:23,115 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:23,119 INFO L225 Difference]: With dead ends: 5981 [2021-06-12 15:34:23,119 INFO L226 Difference]: Without dead ends: 5711 [2021-06-12 15:34:23,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 775.1ms TimeCoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:34:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-12 15:34:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 3888. [2021-06-12 15:34:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.7664008232570105) internal successors, (10753), 3887 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10753 transitions. [2021-06-12 15:34:23,161 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10753 transitions. Word has length 165 [2021-06-12 15:34:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:23,161 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10753 transitions. [2021-06-12 15:34:23,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10753 transitions. [2021-06-12 15:34:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:23,165 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:23,165 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:23,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-12 15:34:23,365 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:23,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1101495447, now seen corresponding path program 352 times [2021-06-12 15:34:23,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:23,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503158413] [2021-06-12 15:34:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:23,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:23,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503158413] [2021-06-12 15:34:23,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503158413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:23,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242588255] [2021-06-12 15:34:23,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:23,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:23,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:23,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:23,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242588255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:23,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:23,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:23,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267830250] [2021-06-12 15:34:23,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:23,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:23,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:23,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:23,957 INFO L87 Difference]: Start difference. First operand 3888 states and 10753 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:24,761 INFO L93 Difference]: Finished difference Result 6006 states and 15192 transitions. [2021-06-12 15:34:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:34:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:24,767 INFO L225 Difference]: With dead ends: 6006 [2021-06-12 15:34:24,767 INFO L226 Difference]: Without dead ends: 5736 [2021-06-12 15:34:24,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 866.0ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:34:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-12 15:34:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 3963. [2021-06-12 15:34:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.7708228167592126) internal successors, (10978), 3962 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10978 transitions. [2021-06-12 15:34:24,815 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10978 transitions. Word has length 165 [2021-06-12 15:34:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:24,815 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10978 transitions. [2021-06-12 15:34:24,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10978 transitions. [2021-06-12 15:34:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:24,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:24,819 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:25,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:25,019 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:25,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1983054629, now seen corresponding path program 353 times [2021-06-12 15:34:25,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:25,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439428827] [2021-06-12 15:34:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:25,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:25,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439428827] [2021-06-12 15:34:25,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439428827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:25,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971374536] [2021-06-12 15:34:25,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:25,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:25,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:25,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971374536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:25,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:25,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:25,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279306433] [2021-06-12 15:34:25,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:25,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:25,588 INFO L87 Difference]: Start difference. First operand 3963 states and 10978 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:26,323 INFO L93 Difference]: Finished difference Result 6031 states and 15317 transitions. [2021-06-12 15:34:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:34:26,324 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:26,329 INFO L225 Difference]: With dead ends: 6031 [2021-06-12 15:34:26,329 INFO L226 Difference]: Without dead ends: 5761 [2021-06-12 15:34:26,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 790.1ms TimeCoverageRelationStatistics Valid=1203, Invalid=3767, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:34:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-12 15:34:26,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4038. [2021-06-12 15:34:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.775080505325737) internal successors, (11203), 4037 states have internal predecessors, (11203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11203 transitions. [2021-06-12 15:34:26,380 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11203 transitions. Word has length 165 [2021-06-12 15:34:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:26,380 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11203 transitions. [2021-06-12 15:34:26,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11203 transitions. [2021-06-12 15:34:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:26,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:26,384 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:26,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:26,584 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:26,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:26,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1340680213, now seen corresponding path program 354 times [2021-06-12 15:34:26,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:26,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886621445] [2021-06-12 15:34:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:26,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886621445] [2021-06-12 15:34:26,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886621445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018533704] [2021-06-12 15:34:26,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:26,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:34:26,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:26,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:26,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:27,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018533704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:27,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:27,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:27,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149574698] [2021-06-12 15:34:27,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:27,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:27,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:27,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:27,199 INFO L87 Difference]: Start difference. First operand 4038 states and 11203 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:28,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:28,056 INFO L93 Difference]: Finished difference Result 6056 states and 15442 transitions. [2021-06-12 15:34:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:34:28,056 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:28,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:28,061 INFO L225 Difference]: With dead ends: 6056 [2021-06-12 15:34:28,062 INFO L226 Difference]: Without dead ends: 5786 [2021-06-12 15:34:28,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 916.2ms TimeCoverageRelationStatistics Valid=1229, Invalid=4027, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:34:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-12 15:34:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4113. [2021-06-12 15:34:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.779182879377432) internal successors, (11428), 4112 states have internal predecessors, (11428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11428 transitions. [2021-06-12 15:34:28,112 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11428 transitions. Word has length 165 [2021-06-12 15:34:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:28,112 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11428 transitions. [2021-06-12 15:34:28,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11428 transitions. [2021-06-12 15:34:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:28,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:28,116 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:28,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:28,316 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1294133283, now seen corresponding path program 355 times [2021-06-12 15:34:28,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:28,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736963714] [2021-06-12 15:34:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:28,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:28,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736963714] [2021-06-12 15:34:28,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736963714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:28,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112728368] [2021-06-12 15:34:28,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:28,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:28,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:28,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112728368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:28,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:28,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:28,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953791730] [2021-06-12 15:34:28,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:28,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:28,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:28,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:28,877 INFO L87 Difference]: Start difference. First operand 4113 states and 11428 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:29,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:29,649 INFO L93 Difference]: Finished difference Result 6081 states and 15567 transitions. [2021-06-12 15:34:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:34:29,649 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:29,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:29,655 INFO L225 Difference]: With dead ends: 6081 [2021-06-12 15:34:29,655 INFO L226 Difference]: Without dead ends: 5811 [2021-06-12 15:34:29,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 817.4ms TimeCoverageRelationStatistics Valid=1263, Invalid=3993, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:34:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-06-12 15:34:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4188. [2021-06-12 15:34:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.7831382851683784) internal successors, (11653), 4187 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:29,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11653 transitions. [2021-06-12 15:34:29,707 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11653 transitions. Word has length 165 [2021-06-12 15:34:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:29,708 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11653 transitions. [2021-06-12 15:34:29,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11653 transitions. [2021-06-12 15:34:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:29,711 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:29,711 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:29,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-12 15:34:29,912 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash 375748883, now seen corresponding path program 356 times [2021-06-12 15:34:29,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:29,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429719377] [2021-06-12 15:34:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:30,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:30,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429719377] [2021-06-12 15:34:30,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429719377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:30,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110939970] [2021-06-12 15:34:30,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:30,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:30,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:30,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:30,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110939970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:30,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:30,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:30,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101993157] [2021-06-12 15:34:30,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:30,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:30,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:30,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:30,474 INFO L87 Difference]: Start difference. First operand 4188 states and 11653 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:31,383 INFO L93 Difference]: Finished difference Result 6106 states and 15692 transitions. [2021-06-12 15:34:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:34:31,383 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:31,389 INFO L225 Difference]: With dead ends: 6106 [2021-06-12 15:34:31,389 INFO L226 Difference]: Without dead ends: 5836 [2021-06-12 15:34:31,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 949.9ms TimeCoverageRelationStatistics Valid=1291, Invalid=4259, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:34:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-12 15:34:31,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 4263. [2021-06-12 15:34:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.786954481464101) internal successors, (11878), 4262 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11878 transitions. [2021-06-12 15:34:31,443 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11878 transitions. Word has length 165 [2021-06-12 15:34:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:31,443 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11878 transitions. [2021-06-12 15:34:31,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11878 transitions. [2021-06-12 15:34:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:31,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:31,447 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:31,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:31,651 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:31,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:31,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1400941919, now seen corresponding path program 357 times [2021-06-12 15:34:31,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:31,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796120872] [2021-06-12 15:34:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:31,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:31,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796120872] [2021-06-12 15:34:31,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796120872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:31,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158716392] [2021-06-12 15:34:31,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:32,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:32,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 15:34:32,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:32,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158716392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:32,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:32,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:32,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636447198] [2021-06-12 15:34:32,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:32,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:32,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:32,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:32,184 INFO L87 Difference]: Start difference. First operand 4263 states and 11878 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:32,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:32,994 INFO L93 Difference]: Finished difference Result 6131 states and 15817 transitions. [2021-06-12 15:34:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:34:32,994 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:32,999 INFO L225 Difference]: With dead ends: 6131 [2021-06-12 15:34:33,000 INFO L226 Difference]: Without dead ends: 5861 [2021-06-12 15:34:33,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 844.1ms TimeCoverageRelationStatistics Valid=1339, Invalid=4211, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:34:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-12 15:34:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 4338. [2021-06-12 15:34:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 2.790638690338944) internal successors, (12103), 4337 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12103 transitions. [2021-06-12 15:34:33,052 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12103 transitions. Word has length 165 [2021-06-12 15:34:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:33,052 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12103 transitions. [2021-06-12 15:34:33,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12103 transitions. [2021-06-12 15:34:33,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:33,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:33,056 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:33,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-12 15:34:33,256 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash 698699665, now seen corresponding path program 358 times [2021-06-12 15:34:33,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:33,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312499590] [2021-06-12 15:34:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:33,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:33,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312499590] [2021-06-12 15:34:33,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312499590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:33,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211821780] [2021-06-12 15:34:33,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:33,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:33,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:33,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:33,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211821780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:33,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:33,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:33,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090743721] [2021-06-12 15:34:33,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:33,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:33,828 INFO L87 Difference]: Start difference. First operand 4338 states and 12103 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:34,767 INFO L93 Difference]: Finished difference Result 6156 states and 15942 transitions. [2021-06-12 15:34:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:34:34,767 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:34,772 INFO L225 Difference]: With dead ends: 6156 [2021-06-12 15:34:34,772 INFO L226 Difference]: Without dead ends: 5886 [2021-06-12 15:34:34,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1012.0ms TimeCoverageRelationStatistics Valid=1369, Invalid=4483, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:34:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-12 15:34:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4413. [2021-06-12 15:34:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 2.7941976427923843) internal successors, (12328), 4412 states have internal predecessors, (12328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12328 transitions. [2021-06-12 15:34:34,824 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12328 transitions. Word has length 165 [2021-06-12 15:34:34,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:34,824 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12328 transitions. [2021-06-12 15:34:34,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12328 transitions. [2021-06-12 15:34:34,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:34,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:34,828 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:35,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-12 15:34:35,028 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:35,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2086067553, now seen corresponding path program 359 times [2021-06-12 15:34:35,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:35,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883455166] [2021-06-12 15:34:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:35,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883455166] [2021-06-12 15:34:35,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883455166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:35,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778136844] [2021-06-12 15:34:35,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:35,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:35,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:35,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:35,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778136844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:35,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:35,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:35,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301152044] [2021-06-12 15:34:35,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:35,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:35,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:35,565 INFO L87 Difference]: Start difference. First operand 4413 states and 12328 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:36,431 INFO L93 Difference]: Finished difference Result 6181 states and 16067 transitions. [2021-06-12 15:34:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:34:36,431 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:36,435 INFO L225 Difference]: With dead ends: 6181 [2021-06-12 15:34:36,435 INFO L226 Difference]: Without dead ends: 5911 [2021-06-12 15:34:36,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 891.7ms TimeCoverageRelationStatistics Valid=1431, Invalid=4421, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:34:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-12 15:34:36,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4488. [2021-06-12 15:34:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.797637619790506) internal successors, (12553), 4487 states have internal predecessors, (12553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12553 transitions. [2021-06-12 15:34:36,487 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12553 transitions. Word has length 165 [2021-06-12 15:34:36,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:36,487 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12553 transitions. [2021-06-12 15:34:36,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12553 transitions. [2021-06-12 15:34:36,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:36,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:36,491 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:36,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-12 15:34:36,704 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1446409329, now seen corresponding path program 360 times [2021-06-12 15:34:36,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:36,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151592225] [2021-06-12 15:34:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:36,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:36,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151592225] [2021-06-12 15:34:36,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151592225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:36,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295377757] [2021-06-12 15:34:36,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:37,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:34:37,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:37,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:37,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295377757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:37,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:37,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:37,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880032086] [2021-06-12 15:34:37,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:37,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:37,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:37,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:37,286 INFO L87 Difference]: Start difference. First operand 4488 states and 12553 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:38,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:38,279 INFO L93 Difference]: Finished difference Result 6206 states and 16192 transitions. [2021-06-12 15:34:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:34:38,279 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:38,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:38,285 INFO L225 Difference]: With dead ends: 6206 [2021-06-12 15:34:38,285 INFO L226 Difference]: Without dead ends: 5936 [2021-06-12 15:34:38,285 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1025.3ms TimeCoverageRelationStatistics Valid=1463, Invalid=4699, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:34:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-12 15:34:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4563. [2021-06-12 15:34:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.800964489259097) internal successors, (12778), 4562 states have internal predecessors, (12778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12778 transitions. [2021-06-12 15:34:38,352 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12778 transitions. Word has length 165 [2021-06-12 15:34:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:38,352 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12778 transitions. [2021-06-12 15:34:38,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12778 transitions. [2021-06-12 15:34:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:38,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:38,356 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:38,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-12 15:34:38,556 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2073638941, now seen corresponding path program 361 times [2021-06-12 15:34:38,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:38,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396902688] [2021-06-12 15:34:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:38,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:38,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396902688] [2021-06-12 15:34:38,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396902688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253809340] [2021-06-12 15:34:38,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:38,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:39,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253809340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:39,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:39,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:39,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728874056] [2021-06-12 15:34:39,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:39,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:39,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:39,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:39,073 INFO L87 Difference]: Start difference. First operand 4563 states and 12778 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:40,065 INFO L93 Difference]: Finished difference Result 6231 states and 16317 transitions. [2021-06-12 15:34:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:34:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:40,071 INFO L225 Difference]: With dead ends: 6231 [2021-06-12 15:34:40,071 INFO L226 Difference]: Without dead ends: 5961 [2021-06-12 15:34:40,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 931.7ms TimeCoverageRelationStatistics Valid=1539, Invalid=4623, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:34:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-12 15:34:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4638. [2021-06-12 15:34:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 2.8041837394867373) internal successors, (13003), 4637 states have internal predecessors, (13003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 13003 transitions. [2021-06-12 15:34:40,134 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 13003 transitions. Word has length 165 [2021-06-12 15:34:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:40,134 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 13003 transitions. [2021-06-12 15:34:40,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 13003 transitions. [2021-06-12 15:34:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:40,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:40,139 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:40,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:40,355 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:40,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1619725581, now seen corresponding path program 362 times [2021-06-12 15:34:40,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:40,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830386749] [2021-06-12 15:34:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:40,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:40,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830386749] [2021-06-12 15:34:40,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830386749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:40,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122013618] [2021-06-12 15:34:40,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:40,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:40,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:40,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:40,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122013618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:40,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:40,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:40,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127326698] [2021-06-12 15:34:40,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:40,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:40,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:40,974 INFO L87 Difference]: Start difference. First operand 4638 states and 13003 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:42,144 INFO L93 Difference]: Finished difference Result 6256 states and 16442 transitions. [2021-06-12 15:34:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:34:42,145 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:42,151 INFO L225 Difference]: With dead ends: 6256 [2021-06-12 15:34:42,151 INFO L226 Difference]: Without dead ends: 5986 [2021-06-12 15:34:42,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1205.7ms TimeCoverageRelationStatistics Valid=1573, Invalid=4907, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:34:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-12 15:34:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4713. [2021-06-12 15:34:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 2.807300509337861) internal successors, (13228), 4712 states have internal predecessors, (13228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13228 transitions. [2021-06-12 15:34:42,215 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13228 transitions. Word has length 165 [2021-06-12 15:34:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:42,215 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13228 transitions. [2021-06-12 15:34:42,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13228 transitions. [2021-06-12 15:34:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:42,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:42,219 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:42,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-12 15:34:42,433 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:42,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1797229797, now seen corresponding path program 363 times [2021-06-12 15:34:42,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:42,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627600544] [2021-06-12 15:34:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:42,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627600544] [2021-06-12 15:34:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627600544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696544608] [2021-06-12 15:34:42,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:42,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:42,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:42,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 15:34:42,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:42,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696544608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:42,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:42,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:42,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893027612] [2021-06-12 15:34:42,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:42,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:42,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:42,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:42,973 INFO L87 Difference]: Start difference. First operand 4713 states and 13228 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:43,892 INFO L93 Difference]: Finished difference Result 6281 states and 16567 transitions. [2021-06-12 15:34:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:34:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:43,898 INFO L225 Difference]: With dead ends: 6281 [2021-06-12 15:34:43,898 INFO L226 Difference]: Without dead ends: 6011 [2021-06-12 15:34:43,899 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 927.8ms TimeCoverageRelationStatistics Valid=1663, Invalid=4817, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:34:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-12 15:34:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4788. [2021-06-12 15:34:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4788 states, 4787 states have (on average 2.810319615625653) internal successors, (13453), 4787 states have internal predecessors, (13453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13453 transitions. [2021-06-12 15:34:43,959 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13453 transitions. Word has length 165 [2021-06-12 15:34:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:43,959 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13453 transitions. [2021-06-12 15:34:43,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13453 transitions. [2021-06-12 15:34:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:43,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:43,963 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:44,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:44,163 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:44,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1597682699, now seen corresponding path program 364 times [2021-06-12 15:34:44,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:44,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67616604] [2021-06-12 15:34:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:44,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67616604] [2021-06-12 15:34:44,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67616604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013599609] [2021-06-12 15:34:44,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:44,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:44,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:44,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:44,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:44,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013599609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:44,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:44,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:44,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092469996] [2021-06-12 15:34:44,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:44,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:44,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:44,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:44,713 INFO L87 Difference]: Start difference. First operand 4788 states and 13453 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:45,834 INFO L93 Difference]: Finished difference Result 6306 states and 16692 transitions. [2021-06-12 15:34:45,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:34:45,834 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:45,840 INFO L225 Difference]: With dead ends: 6306 [2021-06-12 15:34:45,840 INFO L226 Difference]: Without dead ends: 6036 [2021-06-12 15:34:45,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1134.4ms TimeCoverageRelationStatistics Valid=1699, Invalid=5107, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:34:45,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-12 15:34:45,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4863. [2021-06-12 15:34:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4863 states, 4862 states have (on average 2.8132455779514602) internal successors, (13678), 4862 states have internal predecessors, (13678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13678 transitions. [2021-06-12 15:34:45,901 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13678 transitions. Word has length 165 [2021-06-12 15:34:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:45,901 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13678 transitions. [2021-06-12 15:34:45,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13678 transitions. [2021-06-12 15:34:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:45,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:45,905 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:46,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:46,105 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:46,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1168618393, now seen corresponding path program 365 times [2021-06-12 15:34:46,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:46,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039805217] [2021-06-12 15:34:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:46,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:46,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039805217] [2021-06-12 15:34:46,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039805217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:46,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350468904] [2021-06-12 15:34:46,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:46,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:46,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:46,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:46,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:46,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350468904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:46,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:46,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:46,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015269458] [2021-06-12 15:34:46,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:46,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:46,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:46,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:46,634 INFO L87 Difference]: Start difference. First operand 4863 states and 13678 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:47,596 INFO L93 Difference]: Finished difference Result 6331 states and 16817 transitions. [2021-06-12 15:34:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:34:47,596 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:47,602 INFO L225 Difference]: With dead ends: 6331 [2021-06-12 15:34:47,603 INFO L226 Difference]: Without dead ends: 6061 [2021-06-12 15:34:47,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 972.4ms TimeCoverageRelationStatistics Valid=1803, Invalid=5003, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:34:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-12 15:34:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4938. [2021-06-12 15:34:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 4937 states have (on average 2.8160826412801296) internal successors, (13903), 4937 states have internal predecessors, (13903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13903 transitions. [2021-06-12 15:34:47,666 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13903 transitions. Word has length 165 [2021-06-12 15:34:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:47,667 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13903 transitions. [2021-06-12 15:34:47,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13903 transitions. [2021-06-12 15:34:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:47,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:47,671 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:47,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:47,871 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:47,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:47,871 INFO L82 PathProgramCache]: Analyzing trace with hash 482435209, now seen corresponding path program 366 times [2021-06-12 15:34:47,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:47,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610524466] [2021-06-12 15:34:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:48,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:48,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610524466] [2021-06-12 15:34:48,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610524466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:48,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175847161] [2021-06-12 15:34:48,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:48,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:34:48,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:48,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 15:34:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:48,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175847161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:48,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:48,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:48,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335662137] [2021-06-12 15:34:48,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:48,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:48,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:48,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:48,438 INFO L87 Difference]: Start difference. First operand 4938 states and 13903 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:49,571 INFO L93 Difference]: Finished difference Result 6356 states and 16942 transitions. [2021-06-12 15:34:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:34:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:49,578 INFO L225 Difference]: With dead ends: 6356 [2021-06-12 15:34:49,578 INFO L226 Difference]: Without dead ends: 6086 [2021-06-12 15:34:49,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1132.4ms TimeCoverageRelationStatistics Valid=1703, Invalid=5437, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:34:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-12 15:34:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5013. [2021-06-12 15:34:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.818834796488428) internal successors, (14128), 5012 states have internal predecessors, (14128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14128 transitions. [2021-06-12 15:34:49,645 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14128 transitions. Word has length 165 [2021-06-12 15:34:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:49,645 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14128 transitions. [2021-06-12 15:34:49,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14128 transitions. [2021-06-12 15:34:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:49,649 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:49,649 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:49,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:49,850 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:49,850 INFO L82 PathProgramCache]: Analyzing trace with hash 397400471, now seen corresponding path program 367 times [2021-06-12 15:34:49,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:49,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741920118] [2021-06-12 15:34:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:50,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:50,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741920118] [2021-06-12 15:34:50,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741920118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:50,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445996583] [2021-06-12 15:34:50,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:50,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:50,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445996583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:50,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:50,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:50,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484901842] [2021-06-12 15:34:50,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:50,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:50,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:50,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:50,373 INFO L87 Difference]: Start difference. First operand 5013 states and 14128 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:51,371 INFO L93 Difference]: Finished difference Result 6381 states and 17067 transitions. [2021-06-12 15:34:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:34:51,371 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:51,378 INFO L225 Difference]: With dead ends: 6381 [2021-06-12 15:34:51,378 INFO L226 Difference]: Without dead ends: 6111 [2021-06-12 15:34:51,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1006.4ms TimeCoverageRelationStatistics Valid=1959, Invalid=5181, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:34:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-12 15:34:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 5088. [2021-06-12 15:34:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 2.821505799095734) internal successors, (14353), 5087 states have internal predecessors, (14353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:51,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14353 transitions. [2021-06-12 15:34:51,443 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14353 transitions. Word has length 165 [2021-06-12 15:34:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:51,443 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14353 transitions. [2021-06-12 15:34:51,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14353 transitions. [2021-06-12 15:34:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:51,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:51,447 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:51,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-12 15:34:51,648 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash 329249415, now seen corresponding path program 368 times [2021-06-12 15:34:51,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:51,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576363596] [2021-06-12 15:34:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:51,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:51,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576363596] [2021-06-12 15:34:51,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576363596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:51,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877003627] [2021-06-12 15:34:51,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:52,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:52,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:52,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:52,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:52,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877003627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:52,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:52,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:52,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330290852] [2021-06-12 15:34:52,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:52,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:52,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:52,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:52,200 INFO L87 Difference]: Start difference. First operand 5088 states and 14353 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:53,420 INFO L93 Difference]: Finished difference Result 6406 states and 17192 transitions. [2021-06-12 15:34:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:34:53,421 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:53,427 INFO L225 Difference]: With dead ends: 6406 [2021-06-12 15:34:53,427 INFO L226 Difference]: Without dead ends: 6136 [2021-06-12 15:34:53,427 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1212.3ms TimeCoverageRelationStatistics Valid=1999, Invalid=5483, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:34:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-12 15:34:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 5163. [2021-06-12 15:34:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 2.824099186361875) internal successors, (14578), 5162 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14578 transitions. [2021-06-12 15:34:53,492 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14578 transitions. Word has length 165 [2021-06-12 15:34:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:53,492 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14578 transitions. [2021-06-12 15:34:53,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:53,492 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14578 transitions. [2021-06-12 15:34:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:53,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:53,496 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:53,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-12 15:34:53,697 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:53,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:53,697 INFO L82 PathProgramCache]: Analyzing trace with hash -967719659, now seen corresponding path program 369 times [2021-06-12 15:34:53,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:53,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718921709] [2021-06-12 15:34:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:53,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:53,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718921709] [2021-06-12 15:34:53,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718921709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:53,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759024458] [2021-06-12 15:34:53,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:54,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:54,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:54,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:34:54,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:54,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759024458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:54,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:54,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:54,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932270919] [2021-06-12 15:34:54,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:54,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:54,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:54,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:54,232 INFO L87 Difference]: Start difference. First operand 5163 states and 14578 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:55,276 INFO L93 Difference]: Finished difference Result 6431 states and 17317 transitions. [2021-06-12 15:34:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:34:55,277 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:55,283 INFO L225 Difference]: With dead ends: 6431 [2021-06-12 15:34:55,283 INFO L226 Difference]: Without dead ends: 6161 [2021-06-12 15:34:55,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1023.1ms TimeCoverageRelationStatistics Valid=2131, Invalid=5351, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:34:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-12 15:34:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 5238. [2021-06-12 15:34:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 5237 states have (on average 2.8266182929157915) internal successors, (14803), 5237 states have internal predecessors, (14803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14803 transitions. [2021-06-12 15:34:55,347 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14803 transitions. Word has length 165 [2021-06-12 15:34:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:55,348 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14803 transitions. [2021-06-12 15:34:55,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14803 transitions. [2021-06-12 15:34:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:55,352 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:55,352 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:55,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-12 15:34:55,552 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash -537966075, now seen corresponding path program 370 times [2021-06-12 15:34:55,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:55,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646777612] [2021-06-12 15:34:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:55,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:55,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646777612] [2021-06-12 15:34:55,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646777612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:55,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163202106] [2021-06-12 15:34:55,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:55,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:55,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:56,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163202106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:56,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:56,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:56,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904140274] [2021-06-12 15:34:56,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:56,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:56,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:56,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:56,100 INFO L87 Difference]: Start difference. First operand 5238 states and 14803 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:57,380 INFO L93 Difference]: Finished difference Result 6516 states and 17607 transitions. [2021-06-12 15:34:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:34:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:57,387 INFO L225 Difference]: With dead ends: 6516 [2021-06-12 15:34:57,388 INFO L226 Difference]: Without dead ends: 6246 [2021-06-12 15:34:57,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1241.5ms TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:34:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2021-06-12 15:34:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 5313. [2021-06-12 15:34:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 2.8328313253012047) internal successors, (15048), 5312 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 15048 transitions. [2021-06-12 15:34:57,462 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 15048 transitions. Word has length 165 [2021-06-12 15:34:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:57,463 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 15048 transitions. [2021-06-12 15:34:57,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 15048 transitions. [2021-06-12 15:34:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:57,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:57,467 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:57,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-12 15:34:57,668 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:57,668 INFO L82 PathProgramCache]: Analyzing trace with hash -595700205, now seen corresponding path program 371 times [2021-06-12 15:34:57,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:57,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252375490] [2021-06-12 15:34:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:57,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:57,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252375490] [2021-06-12 15:34:57,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252375490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:57,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050306604] [2021-06-12 15:34:57,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:58,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:58,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:58,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:58,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050306604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:58,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:58,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:58,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37148133] [2021-06-12 15:34:58,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:58,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:58,172 INFO L87 Difference]: Start difference. First operand 5313 states and 15048 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:59,383 INFO L93 Difference]: Finished difference Result 7258 states and 19731 transitions. [2021-06-12 15:34:59,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:34:59,384 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:34:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:59,391 INFO L225 Difference]: With dead ends: 7258 [2021-06-12 15:34:59,391 INFO L226 Difference]: Without dead ends: 6988 [2021-06-12 15:34:59,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1171.9ms TimeCoverageRelationStatistics Valid=2320, Invalid=5512, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:34:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-06-12 15:34:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 5493. [2021-06-12 15:34:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.841769847050255) internal successors, (15607), 5492 states have internal predecessors, (15607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 15607 transitions. [2021-06-12 15:34:59,469 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 15607 transitions. Word has length 165 [2021-06-12 15:34:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:59,469 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 15607 transitions. [2021-06-12 15:34:59,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:59,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 15607 transitions. [2021-06-12 15:34:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:59,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:59,474 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:34:59,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:59,674 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:59,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:59,675 INFO L82 PathProgramCache]: Analyzing trace with hash -573356955, now seen corresponding path program 372 times [2021-06-12 15:34:59,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:59,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626914939] [2021-06-12 15:34:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:34:59,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:59,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626914939] [2021-06-12 15:34:59,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626914939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:59,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328337083] [2021-06-12 15:34:59,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:00,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:35:00,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:00,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:00,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:00,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328337083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:00,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:00,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:35:00,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660826601] [2021-06-12 15:35:00,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:00,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:00,213 INFO L87 Difference]: Start difference. First operand 5493 states and 15607 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:01,459 INFO L93 Difference]: Finished difference Result 6720 states and 18381 transitions. [2021-06-12 15:35:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:35:01,460 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-12 15:35:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:01,465 INFO L225 Difference]: With dead ends: 6720 [2021-06-12 15:35:01,465 INFO L226 Difference]: Without dead ends: 6231 [2021-06-12 15:35:01,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 1229.2ms TimeCoverageRelationStatistics Valid=2129, Invalid=6061, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:35:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6231 states. [2021-06-12 15:35:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6231 to 3434. [2021-06-12 15:35:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 2.7427905621905038) internal successors, (9416), 3433 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9416 transitions. [2021-06-12 15:35:01,508 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9416 transitions. Word has length 165 [2021-06-12 15:35:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:01,508 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 9416 transitions. [2021-06-12 15:35:01,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9416 transitions. [2021-06-12 15:35:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:01,511 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:01,511 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:01,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-12 15:35:01,711 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:01,712 INFO L82 PathProgramCache]: Analyzing trace with hash -471160217, now seen corresponding path program 373 times [2021-06-12 15:35:01,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:01,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968301197] [2021-06-12 15:35:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:02,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:02,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968301197] [2021-06-12 15:35:02,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968301197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:02,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825744676] [2021-06-12 15:35:02,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:02,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:35:02,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:02,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825744676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:02,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:02,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:35:02,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447906514] [2021-06-12 15:35:02,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:35:02,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:02,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:35:02,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:35:02,448 INFO L87 Difference]: Start difference. First operand 3434 states and 9416 transitions. Second operand has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:03,143 INFO L93 Difference]: Finished difference Result 4774 states and 12416 transitions. [2021-06-12 15:35:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:35:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:03,148 INFO L225 Difference]: With dead ends: 4774 [2021-06-12 15:35:03,148 INFO L226 Difference]: Without dead ends: 4440 [2021-06-12 15:35:03,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 886.7ms TimeCoverageRelationStatistics Valid=1320, Invalid=3510, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:35:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-06-12 15:35:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3519. [2021-06-12 15:35:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 3518 states have (on average 2.72484366117112) internal successors, (9586), 3518 states have internal predecessors, (9586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 9586 transitions. [2021-06-12 15:35:03,186 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 9586 transitions. Word has length 170 [2021-06-12 15:35:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:03,186 INFO L482 AbstractCegarLoop]: Abstraction has 3519 states and 9586 transitions. [2021-06-12 15:35:03,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 9586 transitions. [2021-06-12 15:35:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:03,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:03,190 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:03,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:03,390 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:03,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1251320075, now seen corresponding path program 374 times [2021-06-12 15:35:03,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:03,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883288493] [2021-06-12 15:35:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:03,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:03,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883288493] [2021-06-12 15:35:03,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883288493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:03,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366449360] [2021-06-12 15:35:03,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:03,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:35:03,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:03,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:04,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366449360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:04,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:04,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:04,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720157373] [2021-06-12 15:35:04,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:04,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:04,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:04,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:04,107 INFO L87 Difference]: Start difference. First operand 3519 states and 9586 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:04,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:04,731 INFO L93 Difference]: Finished difference Result 6096 states and 14997 transitions. [2021-06-12 15:35:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:35:04,732 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:04,738 INFO L225 Difference]: With dead ends: 6096 [2021-06-12 15:35:04,738 INFO L226 Difference]: Without dead ends: 5826 [2021-06-12 15:35:04,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 808.8ms TimeCoverageRelationStatistics Valid=1132, Invalid=2900, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:35:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-12 15:35:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 3663. [2021-06-12 15:35:04,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.7315674494811577) internal successors, (10003), 3662 states have internal predecessors, (10003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10003 transitions. [2021-06-12 15:35:04,785 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10003 transitions. Word has length 170 [2021-06-12 15:35:04,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:04,785 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10003 transitions. [2021-06-12 15:35:04,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:04,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10003 transitions. [2021-06-12 15:35:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:04,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:04,788 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:04,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:04,989 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:04,989 INFO L82 PathProgramCache]: Analyzing trace with hash 310384123, now seen corresponding path program 375 times [2021-06-12 15:35:04,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:04,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915298085] [2021-06-12 15:35:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:05,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:05,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915298085] [2021-06-12 15:35:05,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915298085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:05,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727919818] [2021-06-12 15:35:05,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:05,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:35:05,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:05,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:05,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727919818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:05,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:05,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:05,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163470646] [2021-06-12 15:35:05,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:05,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:05,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:05,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:05,702 INFO L87 Difference]: Start difference. First operand 3663 states and 10003 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:06,424 INFO L93 Difference]: Finished difference Result 6056 states and 14992 transitions. [2021-06-12 15:35:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:35:06,424 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:06,431 INFO L225 Difference]: With dead ends: 6056 [2021-06-12 15:35:06,431 INFO L226 Difference]: Without dead ends: 5786 [2021-06-12 15:35:06,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 904.6ms TimeCoverageRelationStatistics Valid=1215, Invalid=3341, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:35:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-12 15:35:06,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 3738. [2021-06-12 15:35:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.7369547765587368) internal successors, (10228), 3737 states have internal predecessors, (10228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10228 transitions. [2021-06-12 15:35:06,487 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10228 transitions. Word has length 170 [2021-06-12 15:35:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:06,487 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10228 transitions. [2021-06-12 15:35:06,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10228 transitions. [2021-06-12 15:35:06,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:06,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:06,490 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:06,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:06,697 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:06,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1941712905, now seen corresponding path program 376 times [2021-06-12 15:35:06,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:06,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499552967] [2021-06-12 15:35:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:07,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:07,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499552967] [2021-06-12 15:35:07,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499552967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:07,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126774594] [2021-06-12 15:35:07,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:07,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:35:07,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:07,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:07,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:07,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126774594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:07,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:07,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:07,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573066628] [2021-06-12 15:35:07,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:07,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:07,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:07,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:07,439 INFO L87 Difference]: Start difference. First operand 3738 states and 10228 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:08,125 INFO L93 Difference]: Finished difference Result 6106 states and 15167 transitions. [2021-06-12 15:35:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:35:08,126 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:08,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:08,132 INFO L225 Difference]: With dead ends: 6106 [2021-06-12 15:35:08,132 INFO L226 Difference]: Without dead ends: 5836 [2021-06-12 15:35:08,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 851.3ms TimeCoverageRelationStatistics Valid=1129, Invalid=3161, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:35:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-12 15:35:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 3813. [2021-06-12 15:35:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.742130115424974) internal successors, (10453), 3812 states have internal predecessors, (10453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10453 transitions. [2021-06-12 15:35:08,183 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10453 transitions. Word has length 170 [2021-06-12 15:35:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:08,183 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10453 transitions. [2021-06-12 15:35:08,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10453 transitions. [2021-06-12 15:35:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:08,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:08,187 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:08,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:08,404 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:08,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:08,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1096225017, now seen corresponding path program 377 times [2021-06-12 15:35:08,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:08,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825425319] [2021-06-12 15:35:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:08,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:08,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825425319] [2021-06-12 15:35:08,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825425319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:08,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239146648] [2021-06-12 15:35:08,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:08,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:35:08,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:08,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:08,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:09,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239146648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:09,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:09,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:09,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141006721] [2021-06-12 15:35:09,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:09,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:09,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:09,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:09,122 INFO L87 Difference]: Start difference. First operand 3813 states and 10453 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:09,900 INFO L93 Difference]: Finished difference Result 6131 states and 15292 transitions. [2021-06-12 15:35:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:35:09,900 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:09,905 INFO L225 Difference]: With dead ends: 6131 [2021-06-12 15:35:09,905 INFO L226 Difference]: Without dead ends: 5861 [2021-06-12 15:35:09,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 961.2ms TimeCoverageRelationStatistics Valid=1220, Invalid=3610, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:35:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-12 15:35:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 3888. [2021-06-12 15:35:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.7471057370722924) internal successors, (10678), 3887 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10678 transitions. [2021-06-12 15:35:09,953 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10678 transitions. Word has length 170 [2021-06-12 15:35:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:09,953 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10678 transitions. [2021-06-12 15:35:09,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10678 transitions. [2021-06-12 15:35:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:09,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:09,957 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:10,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:10,157 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:10,157 INFO L82 PathProgramCache]: Analyzing trace with hash -809778041, now seen corresponding path program 378 times [2021-06-12 15:35:10,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:10,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414446391] [2021-06-12 15:35:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:10,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:10,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414446391] [2021-06-12 15:35:10,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414446391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:10,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211930147] [2021-06-12 15:35:10,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:10,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:35:10,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:10,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:10,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:10,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211930147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:10,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:10,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:10,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575584511] [2021-06-12 15:35:10,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:10,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:10,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:10,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:10,781 INFO L87 Difference]: Start difference. First operand 3888 states and 10678 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:11,509 INFO L93 Difference]: Finished difference Result 6156 states and 15417 transitions. [2021-06-12 15:35:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:35:11,509 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:11,513 INFO L225 Difference]: With dead ends: 6156 [2021-06-12 15:35:11,513 INFO L226 Difference]: Without dead ends: 5886 [2021-06-12 15:35:11,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 862.0ms TimeCoverageRelationStatistics Valid=1142, Invalid=3414, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:35:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-12 15:35:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 3963. [2021-06-12 15:35:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.7518929833417465) internal successors, (10903), 3962 states have internal predecessors, (10903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10903 transitions. [2021-06-12 15:35:11,557 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10903 transitions. Word has length 170 [2021-06-12 15:35:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:11,557 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10903 transitions. [2021-06-12 15:35:11,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10903 transitions. [2021-06-12 15:35:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:11,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:11,560 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-12 15:35:11,761 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:11,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:11,761 INFO L82 PathProgramCache]: Analyzing trace with hash 73273719, now seen corresponding path program 379 times [2021-06-12 15:35:11,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:11,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836251647] [2021-06-12 15:35:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:12,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836251647] [2021-06-12 15:35:12,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836251647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017203340] [2021-06-12 15:35:12,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:12,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:12,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:12,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017203340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:12,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:12,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:12,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222852008] [2021-06-12 15:35:12,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:12,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:12,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:12,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:12,405 INFO L87 Difference]: Start difference. First operand 3963 states and 10903 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:13,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:13,262 INFO L93 Difference]: Finished difference Result 6181 states and 15542 transitions. [2021-06-12 15:35:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:35:13,262 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:13,267 INFO L225 Difference]: With dead ends: 6181 [2021-06-12 15:35:13,267 INFO L226 Difference]: Without dead ends: 5911 [2021-06-12 15:35:13,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 947.5ms TimeCoverageRelationStatistics Valid=1241, Invalid=3871, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:35:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-12 15:35:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4038. [2021-06-12 15:35:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.7565023532325985) internal successors, (11128), 4037 states have internal predecessors, (11128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11128 transitions. [2021-06-12 15:35:13,345 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11128 transitions. Word has length 170 [2021-06-12 15:35:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:13,346 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11128 transitions. [2021-06-12 15:35:13,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11128 transitions. [2021-06-12 15:35:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:13,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:13,349 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:13,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-12 15:35:13,561 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:13,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1818935675, now seen corresponding path program 380 times [2021-06-12 15:35:13,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:13,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873417888] [2021-06-12 15:35:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:13,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:13,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873417888] [2021-06-12 15:35:13,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873417888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:13,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297792359] [2021-06-12 15:35:13,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:13,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:35:13,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:13,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:14,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297792359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:14,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:14,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:14,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013839688] [2021-06-12 15:35:14,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:14,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:14,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:14,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:14,185 INFO L87 Difference]: Start difference. First operand 4038 states and 11128 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:15,020 INFO L93 Difference]: Finished difference Result 6206 states and 15667 transitions. [2021-06-12 15:35:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:35:15,020 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:15,026 INFO L225 Difference]: With dead ends: 6206 [2021-06-12 15:35:15,026 INFO L226 Difference]: Without dead ends: 5936 [2021-06-12 15:35:15,027 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 931.8ms TimeCoverageRelationStatistics Valid=1171, Invalid=3659, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:35:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-12 15:35:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4113. [2021-06-12 15:35:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.760943579766537) internal successors, (11353), 4112 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11353 transitions. [2021-06-12 15:35:15,091 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11353 transitions. Word has length 170 [2021-06-12 15:35:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:15,091 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11353 transitions. [2021-06-12 15:35:15,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11353 transitions. [2021-06-12 15:35:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:15,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:15,094 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:15,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-12 15:35:15,295 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:15,295 INFO L82 PathProgramCache]: Analyzing trace with hash 22411125, now seen corresponding path program 381 times [2021-06-12 15:35:15,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:15,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601680517] [2021-06-12 15:35:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:15,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:15,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601680517] [2021-06-12 15:35:15,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601680517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:15,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515521745] [2021-06-12 15:35:15,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:15,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:35:15,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:15,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 15:35:15,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:15,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515521745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:15,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:15,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:15,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174557835] [2021-06-12 15:35:15,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:15,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:15,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:15,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:15,964 INFO L87 Difference]: Start difference. First operand 4113 states and 11353 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:16,951 INFO L93 Difference]: Finished difference Result 6231 states and 15792 transitions. [2021-06-12 15:35:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:35:16,951 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:16,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:16,957 INFO L225 Difference]: With dead ends: 6231 [2021-06-12 15:35:16,957 INFO L226 Difference]: Without dead ends: 5961 [2021-06-12 15:35:16,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1091.6ms TimeCoverageRelationStatistics Valid=1180, Invalid=3932, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:35:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-12 15:35:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4188. [2021-06-12 15:35:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.7652256985908763) internal successors, (11578), 4187 states have internal predecessors, (11578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11578 transitions. [2021-06-12 15:35:17,014 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11578 transitions. Word has length 170 [2021-06-12 15:35:17,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:17,014 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11578 transitions. [2021-06-12 15:35:17,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11578 transitions. [2021-06-12 15:35:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:17,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:17,017 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:17,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-12 15:35:17,218 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash 903970307, now seen corresponding path program 382 times [2021-06-12 15:35:17,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:17,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099598229] [2021-06-12 15:35:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:17,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:17,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099598229] [2021-06-12 15:35:17,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099598229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:17,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985058368] [2021-06-12 15:35:17,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:17,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:35:17,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:17,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:17,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985058368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:17,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:17,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:17,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179107245] [2021-06-12 15:35:17,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:17,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:17,848 INFO L87 Difference]: Start difference. First operand 4188 states and 11578 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:18,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:18,689 INFO L93 Difference]: Finished difference Result 6256 states and 15917 transitions. [2021-06-12 15:35:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:35:18,689 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:18,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:18,695 INFO L225 Difference]: With dead ends: 6256 [2021-06-12 15:35:18,695 INFO L226 Difference]: Without dead ends: 5986 [2021-06-12 15:35:18,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 890.7ms TimeCoverageRelationStatistics Valid=1216, Invalid=3896, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:35:18,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-12 15:35:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4263. [2021-06-12 15:35:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.7693571093383387) internal successors, (11803), 4262 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11803 transitions. [2021-06-12 15:35:18,750 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11803 transitions. Word has length 170 [2021-06-12 15:35:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:18,750 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11803 transitions. [2021-06-12 15:35:18,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11803 transitions. [2021-06-12 15:35:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:18,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:18,754 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:18,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:18,954 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash 261595891, now seen corresponding path program 383 times [2021-06-12 15:35:18,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:18,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741870694] [2021-06-12 15:35:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:19,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:19,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741870694] [2021-06-12 15:35:19,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741870694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:19,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020454414] [2021-06-12 15:35:19,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:19,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:35:19,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:19,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:19,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:19,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020454414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:19,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:19,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:19,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54566701] [2021-06-12 15:35:19,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:19,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:19,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:19,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:19,632 INFO L87 Difference]: Start difference. First operand 4263 states and 11803 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:20,644 INFO L93 Difference]: Finished difference Result 6281 states and 16042 transitions. [2021-06-12 15:35:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:35:20,644 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:20,650 INFO L225 Difference]: With dead ends: 6281 [2021-06-12 15:35:20,651 INFO L226 Difference]: Without dead ends: 6011 [2021-06-12 15:35:20,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1122.6ms TimeCoverageRelationStatistics Valid=1331, Invalid=4369, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:35:20,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-12 15:35:20,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4338. [2021-06-12 15:35:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 2.7733456306202444) internal successors, (12028), 4337 states have internal predecessors, (12028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12028 transitions. [2021-06-12 15:35:20,710 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12028 transitions. Word has length 170 [2021-06-12 15:35:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:20,710 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12028 transitions. [2021-06-12 15:35:20,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12028 transitions. [2021-06-12 15:35:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:20,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:20,714 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:20,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:20,931 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash 215048961, now seen corresponding path program 384 times [2021-06-12 15:35:20,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:20,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395034591] [2021-06-12 15:35:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:21,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:21,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395034591] [2021-06-12 15:35:21,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395034591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:21,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499136356] [2021-06-12 15:35:21,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:21,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:35:21,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:21,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:21,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:21,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499136356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:21,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:21,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:21,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149598855] [2021-06-12 15:35:21,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:21,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:21,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:21,536 INFO L87 Difference]: Start difference. First operand 4338 states and 12028 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:22,514 INFO L93 Difference]: Finished difference Result 6306 states and 16167 transitions. [2021-06-12 15:35:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:35:22,514 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:22,520 INFO L225 Difference]: With dead ends: 6306 [2021-06-12 15:35:22,520 INFO L226 Difference]: Without dead ends: 6036 [2021-06-12 15:35:22,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 996.7ms TimeCoverageRelationStatistics Valid=1277, Invalid=4125, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:35:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-12 15:35:22,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4413. [2021-06-12 15:35:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 2.777198549410698) internal successors, (12253), 4412 states have internal predecessors, (12253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12253 transitions. [2021-06-12 15:35:22,579 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12253 transitions. Word has length 170 [2021-06-12 15:35:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:22,579 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12253 transitions. [2021-06-12 15:35:22,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12253 transitions. [2021-06-12 15:35:22,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:22,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:22,583 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:22,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-12 15:35:22,801 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash -703335439, now seen corresponding path program 385 times [2021-06-12 15:35:22,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:22,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944290443] [2021-06-12 15:35:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:23,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944290443] [2021-06-12 15:35:23,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944290443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301491725] [2021-06-12 15:35:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:23,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:23,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:23,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301491725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:23,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:23,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:23,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848236846] [2021-06-12 15:35:23,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:23,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:23,551 INFO L87 Difference]: Start difference. First operand 4413 states and 12253 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:24,690 INFO L93 Difference]: Finished difference Result 6331 states and 16292 transitions. [2021-06-12 15:35:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:35:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:24,696 INFO L225 Difference]: With dead ends: 6331 [2021-06-12 15:35:24,697 INFO L226 Difference]: Without dead ends: 6061 [2021-06-12 15:35:24,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1233.3ms TimeCoverageRelationStatistics Valid=1400, Invalid=4606, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:35:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-12 15:35:24,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4488. [2021-06-12 15:35:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.7809226654780477) internal successors, (12478), 4487 states have internal predecessors, (12478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12478 transitions. [2021-06-12 15:35:24,755 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12478 transitions. Word has length 170 [2021-06-12 15:35:24,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:24,755 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12478 transitions. [2021-06-12 15:35:24,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12478 transitions. [2021-06-12 15:35:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:24,759 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:24,759 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:24,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:24,977 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1814941055, now seen corresponding path program 386 times [2021-06-12 15:35:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:24,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086686364] [2021-06-12 15:35:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:25,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:25,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086686364] [2021-06-12 15:35:25,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086686364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:25,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110637742] [2021-06-12 15:35:25,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:25,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:35:25,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:25,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:25,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110637742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:25,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:25,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:25,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696118034] [2021-06-12 15:35:25,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:25,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:25,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:25,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:25,548 INFO L87 Difference]: Start difference. First operand 4488 states and 12478 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:26,412 INFO L93 Difference]: Finished difference Result 6356 states and 16417 transitions. [2021-06-12 15:35:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:35:26,412 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:26,420 INFO L225 Difference]: With dead ends: 6356 [2021-06-12 15:35:26,421 INFO L226 Difference]: Without dead ends: 6086 [2021-06-12 15:35:26,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 936.7ms TimeCoverageRelationStatistics Valid=1354, Invalid=4346, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:35:26,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-12 15:35:26,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4563. [2021-06-12 15:35:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.7845243314335817) internal successors, (12703), 4562 states have internal predecessors, (12703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12703 transitions. [2021-06-12 15:35:26,479 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12703 transitions. Word has length 170 [2021-06-12 15:35:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:26,479 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12703 transitions. [2021-06-12 15:35:26,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12703 transitions. [2021-06-12 15:35:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:26,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:26,483 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:26,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-06-12 15:35:26,683 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash -380384657, now seen corresponding path program 387 times [2021-06-12 15:35:26,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:26,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598405617] [2021-06-12 15:35:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:27,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:27,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598405617] [2021-06-12 15:35:27,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598405617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:27,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158910138] [2021-06-12 15:35:27,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:27,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:35:27,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:27,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 15:35:27,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:27,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158910138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:27,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:27,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:27,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460387434] [2021-06-12 15:35:27,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:27,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:27,309 INFO L87 Difference]: Start difference. First operand 4563 states and 12703 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:28,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:28,318 INFO L93 Difference]: Finished difference Result 6381 states and 16542 transitions. [2021-06-12 15:35:28,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:35:28,318 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:28,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:28,324 INFO L225 Difference]: With dead ends: 6381 [2021-06-12 15:35:28,324 INFO L226 Difference]: Without dead ends: 6111 [2021-06-12 15:35:28,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1065.5ms TimeCoverageRelationStatistics Valid=1333, Invalid=4673, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:35:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-12 15:35:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4638. [2021-06-12 15:35:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 2.7880094888936813) internal successors, (12928), 4637 states have internal predecessors, (12928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 12928 transitions. [2021-06-12 15:35:28,379 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 12928 transitions. Word has length 170 [2021-06-12 15:35:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:28,379 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 12928 transitions. [2021-06-12 15:35:28,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 12928 transitions. [2021-06-12 15:35:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:28,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:28,384 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:28,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:28,584 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:28,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1129815421, now seen corresponding path program 388 times [2021-06-12 15:35:28,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:28,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71221490] [2021-06-12 15:35:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:28,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:28,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71221490] [2021-06-12 15:35:28,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71221490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:28,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046879444] [2021-06-12 15:35:28,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:28,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:35:28,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:28,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:28,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:29,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046879444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:29,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:29,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:29,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860977452] [2021-06-12 15:35:29,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:29,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:29,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:29,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:29,153 INFO L87 Difference]: Start difference. First operand 4638 states and 12928 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:30,090 INFO L93 Difference]: Finished difference Result 6406 states and 16667 transitions. [2021-06-12 15:35:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:35:30,090 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:30,095 INFO L225 Difference]: With dead ends: 6406 [2021-06-12 15:35:30,095 INFO L226 Difference]: Without dead ends: 6136 [2021-06-12 15:35:30,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 966.7ms TimeCoverageRelationStatistics Valid=1447, Invalid=4559, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:35:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-12 15:35:30,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4713. [2021-06-12 15:35:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 2.791383701188455) internal successors, (13153), 4712 states have internal predecessors, (13153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13153 transitions. [2021-06-12 15:35:30,153 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13153 transitions. Word has length 170 [2021-06-12 15:35:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:30,153 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13153 transitions. [2021-06-12 15:35:30,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13153 transitions. [2021-06-12 15:35:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:30,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:30,158 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:30,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:30,369 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1769473645, now seen corresponding path program 389 times [2021-06-12 15:35:30,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:30,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309704789] [2021-06-12 15:35:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:30,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:30,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309704789] [2021-06-12 15:35:30,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309704789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:30,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680366609] [2021-06-12 15:35:30,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:30,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:35:30,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:30,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:30,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:31,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680366609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:31,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:31,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:31,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923705006] [2021-06-12 15:35:31,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:31,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:31,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:31,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:31,004 INFO L87 Difference]: Start difference. First operand 4713 states and 13153 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:32,283 INFO L93 Difference]: Finished difference Result 6431 states and 16792 transitions. [2021-06-12 15:35:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:35:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:32,289 INFO L225 Difference]: With dead ends: 6431 [2021-06-12 15:35:32,289 INFO L226 Difference]: Without dead ends: 6161 [2021-06-12 15:35:32,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1318.5ms TimeCoverageRelationStatistics Valid=1586, Invalid=5056, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:35:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-12 15:35:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4788. [2021-06-12 15:35:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4788 states, 4787 states have (on average 2.794652182995613) internal successors, (13378), 4787 states have internal predecessors, (13378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13378 transitions. [2021-06-12 15:35:32,348 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13378 transitions. Word has length 170 [2021-06-12 15:35:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:32,349 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13378 transitions. [2021-06-12 15:35:32,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13378 transitions. [2021-06-12 15:35:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:32,353 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:32,353 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:32,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:32,565 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash 994554619, now seen corresponding path program 390 times [2021-06-12 15:35:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:32,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370572711] [2021-06-12 15:35:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:32,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:32,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370572711] [2021-06-12 15:35:32,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370572711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:32,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133816858] [2021-06-12 15:35:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:33,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:35:33,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:33,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:33,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:33,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133816858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:33,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:33,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:33,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611643788] [2021-06-12 15:35:33,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:33,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:33,198 INFO L87 Difference]: Start difference. First operand 4788 states and 13378 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:34,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:34,188 INFO L93 Difference]: Finished difference Result 6456 states and 16917 transitions. [2021-06-12 15:35:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:35:34,189 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:34,194 INFO L225 Difference]: With dead ends: 6456 [2021-06-12 15:35:34,194 INFO L226 Difference]: Without dead ends: 6186 [2021-06-12 15:35:34,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1024.4ms TimeCoverageRelationStatistics Valid=1556, Invalid=4764, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:35:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-06-12 15:35:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4863. [2021-06-12 15:35:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4863 states, 4862 states have (on average 2.7978198272315917) internal successors, (13603), 4862 states have internal predecessors, (13603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13603 transitions. [2021-06-12 15:35:34,249 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13603 transitions. Word has length 170 [2021-06-12 15:35:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:34,249 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13603 transitions. [2021-06-12 15:35:34,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13603 transitions. [2021-06-12 15:35:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:34,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:34,253 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:34,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-12 15:35:34,459 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:34,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:34,459 INFO L82 PathProgramCache]: Analyzing trace with hash 540641259, now seen corresponding path program 391 times [2021-06-12 15:35:34,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:34,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931460544] [2021-06-12 15:35:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:34,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:34,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931460544] [2021-06-12 15:35:34,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931460544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:34,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736746804] [2021-06-12 15:35:34,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:34,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:35,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736746804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:35,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:35,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:35,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931927491] [2021-06-12 15:35:35,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:35,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:35,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:35,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:35,024 INFO L87 Difference]: Start difference. First operand 4863 states and 13603 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:36,260 INFO L93 Difference]: Finished difference Result 6481 states and 17042 transitions. [2021-06-12 15:35:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:35:36,260 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:36,266 INFO L225 Difference]: With dead ends: 6481 [2021-06-12 15:35:36,266 INFO L226 Difference]: Without dead ends: 6211 [2021-06-12 15:35:36,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1239.0ms TimeCoverageRelationStatistics Valid=1703, Invalid=5269, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:35:36,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-06-12 15:35:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4938. [2021-06-12 15:35:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 4937 states have (on average 2.800891229491594) internal successors, (13828), 4937 states have internal predecessors, (13828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13828 transitions. [2021-06-12 15:35:36,328 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13828 transitions. Word has length 170 [2021-06-12 15:35:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:36,329 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13828 transitions. [2021-06-12 15:35:36,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13828 transitions. [2021-06-12 15:35:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:36,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:36,333 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:36,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:36,533 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:36,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:36,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1418653177, now seen corresponding path program 392 times [2021-06-12 15:35:36,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:36,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433609859] [2021-06-12 15:35:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:37,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:37,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433609859] [2021-06-12 15:35:37,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433609859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:37,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197020042] [2021-06-12 15:35:37,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:37,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:35:37,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:37,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:37,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:37,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197020042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:37,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:37,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:37,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403892766] [2021-06-12 15:35:37,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:37,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:37,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:37,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:37,397 INFO L87 Difference]: Start difference. First operand 4938 states and 13828 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:38,815 INFO L93 Difference]: Finished difference Result 6506 states and 17167 transitions. [2021-06-12 15:35:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:35:38,815 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:38,820 INFO L225 Difference]: With dead ends: 6506 [2021-06-12 15:35:38,820 INFO L226 Difference]: Without dead ends: 6236 [2021-06-12 15:35:38,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 1580.3ms TimeCoverageRelationStatistics Valid=1681, Invalid=4961, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:35:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-12 15:35:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 5013. [2021-06-12 15:35:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.8038707102952913) internal successors, (14053), 5012 states have internal predecessors, (14053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14053 transitions. [2021-06-12 15:35:38,881 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14053 transitions. Word has length 170 [2021-06-12 15:35:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:38,882 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14053 transitions. [2021-06-12 15:35:38,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14053 transitions. [2021-06-12 15:35:38,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:38,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:38,886 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:39,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-12 15:35:39,087 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:39,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:39,087 INFO L82 PathProgramCache]: Analyzing trace with hash 518598377, now seen corresponding path program 393 times [2021-06-12 15:35:39,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:39,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45068884] [2021-06-12 15:35:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:39,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:39,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45068884] [2021-06-12 15:35:39,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45068884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:39,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515827884] [2021-06-12 15:35:39,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:39,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:35:39,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:39,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 15:35:39,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:39,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515827884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:39,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:39,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:39,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736560372] [2021-06-12 15:35:39,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:39,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:39,700 INFO L87 Difference]: Start difference. First operand 5013 states and 14053 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:40,952 INFO L93 Difference]: Finished difference Result 6531 states and 17292 transitions. [2021-06-12 15:35:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:35:40,952 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:40,958 INFO L225 Difference]: With dead ends: 6531 [2021-06-12 15:35:40,958 INFO L226 Difference]: Without dead ends: 6261 [2021-06-12 15:35:40,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 1215.9ms TimeCoverageRelationStatistics Valid=1603, Invalid=5369, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:35:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-06-12 15:35:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 5088. [2021-06-12 15:35:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 2.806762335364655) internal successors, (14278), 5087 states have internal predecessors, (14278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14278 transitions. [2021-06-12 15:35:41,019 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14278 transitions. Word has length 170 [2021-06-12 15:35:41,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:41,020 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14278 transitions. [2021-06-12 15:35:41,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14278 transitions. [2021-06-12 15:35:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:41,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:41,024 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:41,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-12 15:35:41,225 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash 89534071, now seen corresponding path program 394 times [2021-06-12 15:35:41,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:41,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574824270] [2021-06-12 15:35:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:41,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:41,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574824270] [2021-06-12 15:35:41,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574824270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:41,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822941750] [2021-06-12 15:35:41,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:41,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:35:41,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:41,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:41,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822941750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:41,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:41,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122305193] [2021-06-12 15:35:41,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:41,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:41,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:41,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:41,793 INFO L87 Difference]: Start difference. First operand 5088 states and 14278 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:42,839 INFO L93 Difference]: Finished difference Result 6556 states and 17417 transitions. [2021-06-12 15:35:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:35:42,839 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:42,845 INFO L225 Difference]: With dead ends: 6556 [2021-06-12 15:35:42,845 INFO L226 Difference]: Without dead ends: 6286 [2021-06-12 15:35:42,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1079.9ms TimeCoverageRelationStatistics Valid=1822, Invalid=5150, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:35:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-06-12 15:35:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 5163. [2021-06-12 15:35:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 2.8095699341340565) internal successors, (14503), 5162 states have internal predecessors, (14503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14503 transitions. [2021-06-12 15:35:42,905 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14503 transitions. Word has length 170 [2021-06-12 15:35:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:42,905 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14503 transitions. [2021-06-12 15:35:42,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14503 transitions. [2021-06-12 15:35:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:42,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:42,910 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:43,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:43,110 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:43,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:43,110 INFO L82 PathProgramCache]: Analyzing trace with hash -596649113, now seen corresponding path program 395 times [2021-06-12 15:35:43,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:43,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187628422] [2021-06-12 15:35:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:43,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:43,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187628422] [2021-06-12 15:35:43,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187628422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:43,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117778135] [2021-06-12 15:35:43,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:43,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:35:43,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:43,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:43,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117778135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:43,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:43,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:43,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624644585] [2021-06-12 15:35:43,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:43,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:43,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:43,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:43,668 INFO L87 Difference]: Start difference. First operand 5163 states and 14503 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:44,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:44,963 INFO L93 Difference]: Finished difference Result 6581 states and 17542 transitions. [2021-06-12 15:35:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:35:44,963 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:44,969 INFO L225 Difference]: With dead ends: 6581 [2021-06-12 15:35:44,969 INFO L226 Difference]: Without dead ends: 6311 [2021-06-12 15:35:44,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1278.0ms TimeCoverageRelationStatistics Valid=1985, Invalid=5671, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:35:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-12 15:35:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5238. [2021-06-12 15:35:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 5237 states have (on average 2.812297116669849) internal successors, (14728), 5237 states have internal predecessors, (14728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14728 transitions. [2021-06-12 15:35:45,033 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14728 transitions. Word has length 170 [2021-06-12 15:35:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:45,033 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14728 transitions. [2021-06-12 15:35:45,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14728 transitions. [2021-06-12 15:35:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:45,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:45,038 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:45,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-12 15:35:45,238 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -681683851, now seen corresponding path program 396 times [2021-06-12 15:35:45,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:45,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64534944] [2021-06-12 15:35:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:45,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:45,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64534944] [2021-06-12 15:35:45,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64534944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:45,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770198891] [2021-06-12 15:35:45,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:45,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:35:45,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:35:45,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:45,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770198891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:45,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:45,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:45,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976862981] [2021-06-12 15:35:45,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:45,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:45,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:45,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:45,784 INFO L87 Difference]: Start difference. First operand 5238 states and 14728 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:46,916 INFO L93 Difference]: Finished difference Result 6606 states and 17667 transitions. [2021-06-12 15:35:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:35:46,916 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:46,923 INFO L225 Difference]: With dead ends: 6606 [2021-06-12 15:35:46,923 INFO L226 Difference]: Without dead ends: 6336 [2021-06-12 15:35:46,923 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1100.6ms TimeCoverageRelationStatistics Valid=1979, Invalid=5331, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 15:35:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-06-12 15:35:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5313. [2021-06-12 15:35:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 2.8149472891566263) internal successors, (14953), 5312 states have internal predecessors, (14953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 14953 transitions. [2021-06-12 15:35:46,989 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 14953 transitions. Word has length 170 [2021-06-12 15:35:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:46,989 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 14953 transitions. [2021-06-12 15:35:46,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:46,989 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 14953 transitions. [2021-06-12 15:35:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:46,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:46,994 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:47,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-12 15:35:47,194 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:47,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:47,195 INFO L82 PathProgramCache]: Analyzing trace with hash -749834907, now seen corresponding path program 397 times [2021-06-12 15:35:47,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:47,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219839750] [2021-06-12 15:35:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:47,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:47,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219839750] [2021-06-12 15:35:47,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219839750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:47,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030705128] [2021-06-12 15:35:47,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:47,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:47,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:47,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030705128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:47,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:47,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:47,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770813087] [2021-06-12 15:35:47,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:47,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:47,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:47,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:47,801 INFO L87 Difference]: Start difference. First operand 5313 states and 14953 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:49,191 INFO L93 Difference]: Finished difference Result 6631 states and 17792 transitions. [2021-06-12 15:35:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:35:49,191 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:49,197 INFO L225 Difference]: With dead ends: 6631 [2021-06-12 15:35:49,197 INFO L226 Difference]: Without dead ends: 6361 [2021-06-12 15:35:49,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1366.2ms TimeCoverageRelationStatistics Valid=2150, Invalid=5860, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 15:35:49,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-12 15:35:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 5388. [2021-06-12 15:35:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5388 states, 5387 states have (on average 2.817523668089846) internal successors, (15178), 5387 states have internal predecessors, (15178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 15178 transitions. [2021-06-12 15:35:49,267 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 15178 transitions. Word has length 170 [2021-06-12 15:35:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:49,267 INFO L482 AbstractCegarLoop]: Abstraction has 5388 states and 15178 transitions. [2021-06-12 15:35:49,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 15178 transitions. [2021-06-12 15:35:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:49,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:49,271 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:49,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:49,472 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:49,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2046803981, now seen corresponding path program 398 times [2021-06-12 15:35:49,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:49,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437407526] [2021-06-12 15:35:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:49,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:49,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437407526] [2021-06-12 15:35:49,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437407526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:49,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593904820] [2021-06-12 15:35:49,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:49,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:35:49,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:49,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:50,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593904820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:50,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:50,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:50,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875587167] [2021-06-12 15:35:50,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:50,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:50,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:50,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:50,016 INFO L87 Difference]: Start difference. First operand 5388 states and 15178 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:51,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:51,176 INFO L93 Difference]: Finished difference Result 6656 states and 17917 transitions. [2021-06-12 15:35:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:35:51,176 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:51,182 INFO L225 Difference]: With dead ends: 6656 [2021-06-12 15:35:51,183 INFO L226 Difference]: Without dead ends: 6386 [2021-06-12 15:35:51,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1154.9ms TimeCoverageRelationStatistics Valid=2152, Invalid=5504, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:35:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-06-12 15:35:51,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5463. [2021-06-12 15:35:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 5462 states have (on average 2.8200292932991577) internal successors, (15403), 5462 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 15403 transitions. [2021-06-12 15:35:51,253 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 15403 transitions. Word has length 170 [2021-06-12 15:35:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:51,253 INFO L482 AbstractCegarLoop]: Abstraction has 5463 states and 15403 transitions. [2021-06-12 15:35:51,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 15403 transitions. [2021-06-12 15:35:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:51,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:51,258 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:51,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:51,459 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1617050397, now seen corresponding path program 399 times [2021-06-12 15:35:51,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:51,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476134359] [2021-06-12 15:35:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:51,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:51,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476134359] [2021-06-12 15:35:51,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476134359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:51,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305863643] [2021-06-12 15:35:51,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:51,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:35:51,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:51,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:35:51,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:52,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305863643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:52,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:52,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:52,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851617684] [2021-06-12 15:35:52,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:52,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:52,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:52,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:52,019 INFO L87 Difference]: Start difference. First operand 5463 states and 15403 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:53,344 INFO L93 Difference]: Finished difference Result 6741 states and 18207 transitions. [2021-06-12 15:35:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:35:53,344 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:53,351 INFO L225 Difference]: With dead ends: 6741 [2021-06-12 15:35:53,351 INFO L226 Difference]: Without dead ends: 6471 [2021-06-12 15:35:53,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 1288.1ms TimeCoverageRelationStatistics Valid=1990, Invalid=6020, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 15:35:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-12 15:35:53,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 5538. [2021-06-12 15:35:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5538 states, 5537 states have (on average 2.826079104208055) internal successors, (15648), 5537 states have internal predecessors, (15648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:53,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 15648 transitions. [2021-06-12 15:35:53,422 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 15648 transitions. Word has length 170 [2021-06-12 15:35:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:53,422 INFO L482 AbstractCegarLoop]: Abstraction has 5538 states and 15648 transitions. [2021-06-12 15:35:53,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 15648 transitions. [2021-06-12 15:35:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:53,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:53,427 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:53,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:53,627 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:53,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:53,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1674784527, now seen corresponding path program 400 times [2021-06-12 15:35:53,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:53,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410431098] [2021-06-12 15:35:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:53,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:53,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410431098] [2021-06-12 15:35:53,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410431098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:53,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904187275] [2021-06-12 15:35:53,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:53,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:35:53,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:53,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:54,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904187275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:54,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:54,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:54,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801116776] [2021-06-12 15:35:54,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:54,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:54,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:54,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:54,186 INFO L87 Difference]: Start difference. First operand 5538 states and 15648 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:55,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:55,367 INFO L93 Difference]: Finished difference Result 7508 states and 20381 transitions. [2021-06-12 15:35:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:35:55,367 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:55,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:55,375 INFO L225 Difference]: With dead ends: 7508 [2021-06-12 15:35:55,375 INFO L226 Difference]: Without dead ends: 7238 [2021-06-12 15:35:55,376 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 1146.3ms TimeCoverageRelationStatistics Valid=2342, Invalid=5668, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 15:35:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-06-12 15:35:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 5718. [2021-06-12 15:35:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 2.8348784327444463) internal successors, (16207), 5717 states have internal predecessors, (16207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 16207 transitions. [2021-06-12 15:35:55,448 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 16207 transitions. Word has length 170 [2021-06-12 15:35:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:55,448 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 16207 transitions. [2021-06-12 15:35:55,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 16207 transitions. [2021-06-12 15:35:55,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:55,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:55,453 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:55,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:55,654 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1652441277, now seen corresponding path program 401 times [2021-06-12 15:35:55,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:55,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606213549] [2021-06-12 15:35:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:55,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:55,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606213549] [2021-06-12 15:35:55,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606213549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:55,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823590628] [2021-06-12 15:35:55,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:56,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:35:56,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:56,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:56,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823590628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:56,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:56,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-06-12 15:35:56,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649898001] [2021-06-12 15:35:56,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:35:56,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:56,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:35:56,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:35:56,240 INFO L87 Difference]: Start difference. First operand 5718 states and 16207 transitions. Second operand has 35 states, 35 states have (on average 4.942857142857143) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:57,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:57,759 INFO L93 Difference]: Finished difference Result 7451 states and 20241 transitions. [2021-06-12 15:35:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 15:35:57,759 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.942857142857143) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-12 15:35:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:57,767 INFO L225 Difference]: With dead ends: 7451 [2021-06-12 15:35:57,767 INFO L226 Difference]: Without dead ends: 6876 [2021-06-12 15:35:57,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 1497.7ms TimeCoverageRelationStatistics Valid=2617, Invalid=6889, Unknown=0, NotChecked=0, Total=9506 [2021-06-12 15:35:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-06-12 15:35:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5753. [2021-06-12 15:35:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:35:57,857 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 170 [2021-06-12 15:35:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:57,857 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:35:57,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 4.942857142857143) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:35:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:35:57,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:57,862 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:58,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:58,062 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:58,063 INFO L82 PathProgramCache]: Analyzing trace with hash 420129948, now seen corresponding path program 402 times [2021-06-12 15:35:58,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:58,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014487015] [2021-06-12 15:35:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:58,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:58,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014487015] [2021-06-12 15:35:58,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014487015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:58,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008534350] [2021-06-12 15:35:58,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:58,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:35:58,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:58,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:35:58,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:35:58,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008534350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:58,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:58,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:35:58,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358841486] [2021-06-12 15:35:58,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:35:58,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:58,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:35:58,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:35:58,738 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:59,424 INFO L93 Difference]: Finished difference Result 7496 states and 19897 transitions. [2021-06-12 15:35:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:35:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:35:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:59,432 INFO L225 Difference]: With dead ends: 7496 [2021-06-12 15:35:59,432 INFO L226 Difference]: Without dead ends: 7226 [2021-06-12 15:35:59,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 839.0ms TimeCoverageRelationStatistics Valid=1270, Invalid=3422, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:35:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-06-12 15:35:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 5753. [2021-06-12 15:35:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:35:59,501 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:35:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:59,501 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:35:59,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:35:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:35:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:35:59,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:59,506 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:35:59,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-12 15:35:59,707 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash -520806004, now seen corresponding path program 403 times [2021-06-12 15:35:59,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:59,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697986078] [2021-06-12 15:35:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:00,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:00,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697986078] [2021-06-12 15:36:00,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697986078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:00,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799958901] [2021-06-12 15:36:00,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:00,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:00,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:00,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799958901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:00,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:00,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:00,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272531781] [2021-06-12 15:36:00,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:00,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:00,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:00,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:00,422 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:01,149 INFO L93 Difference]: Finished difference Result 8141 states and 21187 transitions. [2021-06-12 15:36:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:36:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:01,158 INFO L225 Difference]: With dead ends: 8141 [2021-06-12 15:36:01,158 INFO L226 Difference]: Without dead ends: 7871 [2021-06-12 15:36:01,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 935.1ms TimeCoverageRelationStatistics Valid=1340, Invalid=3772, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:36:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-06-12 15:36:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 5753. [2021-06-12 15:36:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:01,230 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:01,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:01,230 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:01,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:01,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:01,236 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:01,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-12 15:36:01,436 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1110522778, now seen corresponding path program 404 times [2021-06-12 15:36:01,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:01,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846491028] [2021-06-12 15:36:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:01,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:01,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846491028] [2021-06-12 15:36:01,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846491028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:01,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727193678] [2021-06-12 15:36:01,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:01,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:36:01,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:01,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:01,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:02,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727193678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:02,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:02,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:02,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862926132] [2021-06-12 15:36:02,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:02,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:02,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:02,106 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:02,819 INFO L93 Difference]: Finished difference Result 8096 states and 21097 transitions. [2021-06-12 15:36:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:36:02,819 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:02,827 INFO L225 Difference]: With dead ends: 8096 [2021-06-12 15:36:02,827 INFO L226 Difference]: Without dead ends: 7826 [2021-06-12 15:36:02,828 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 882.6ms TimeCoverageRelationStatistics Valid=1328, Invalid=3784, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:36:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-06-12 15:36:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 5753. [2021-06-12 15:36:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:02,898 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:02,898 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:02,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:02,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:02,903 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:03,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:03,103 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:03,103 INFO L82 PathProgramCache]: Analyzing trace with hash 265034890, now seen corresponding path program 405 times [2021-06-12 15:36:03,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:03,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755439954] [2021-06-12 15:36:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:03,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:03,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755439954] [2021-06-12 15:36:03,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755439954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:03,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244115751] [2021-06-12 15:36:03,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:03,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:36:03,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:03,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:03,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:03,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244115751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:03,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:03,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:03,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348297593] [2021-06-12 15:36:03,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:03,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:03,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:03,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:03,859 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:04,668 INFO L93 Difference]: Finished difference Result 8046 states and 20997 transitions. [2021-06-12 15:36:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:36:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:04,677 INFO L225 Difference]: With dead ends: 8046 [2021-06-12 15:36:04,677 INFO L226 Difference]: Without dead ends: 7776 [2021-06-12 15:36:04,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1007.4ms TimeCoverageRelationStatistics Valid=1351, Invalid=4051, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:36:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-06-12 15:36:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 5753. [2021-06-12 15:36:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:04,748 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:04,748 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:04,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:04,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:04,753 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:04,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-12 15:36:04,954 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:04,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:04,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1640968168, now seen corresponding path program 406 times [2021-06-12 15:36:04,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:04,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820255221] [2021-06-12 15:36:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:05,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:05,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820255221] [2021-06-12 15:36:05,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820255221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:05,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441220653] [2021-06-12 15:36:05,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:05,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:36:05,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:05,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:05,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441220653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:05,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:05,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:05,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17878337] [2021-06-12 15:36:05,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:05,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:05,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:05,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:05,604 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:06,429 INFO L93 Difference]: Finished difference Result 7996 states and 20897 transitions. [2021-06-12 15:36:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:36:06,429 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:06,437 INFO L225 Difference]: With dead ends: 7996 [2021-06-12 15:36:06,438 INFO L226 Difference]: Without dead ends: 7726 [2021-06-12 15:36:06,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 874.7ms TimeCoverageRelationStatistics Valid=1353, Invalid=4049, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:36:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-12 15:36:06,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5753. [2021-06-12 15:36:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:06,507 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:06,508 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:06,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:06,512 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:06,512 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:06,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-12 15:36:06,713 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:06,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:06,713 INFO L82 PathProgramCache]: Analyzing trace with hash -757916408, now seen corresponding path program 407 times [2021-06-12 15:36:06,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:06,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750133544] [2021-06-12 15:36:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:07,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:07,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750133544] [2021-06-12 15:36:07,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750133544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:07,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151519165] [2021-06-12 15:36:07,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:07,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:36:07,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:07,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:07,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151519165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:07,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:07,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797544651] [2021-06-12 15:36:07,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:07,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:07,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:07,428 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:08,310 INFO L93 Difference]: Finished difference Result 7946 states and 20797 transitions. [2021-06-12 15:36:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:36:08,310 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:08,318 INFO L225 Difference]: With dead ends: 7946 [2021-06-12 15:36:08,319 INFO L226 Difference]: Without dead ends: 7676 [2021-06-12 15:36:08,319 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1002.0ms TimeCoverageRelationStatistics Valid=1378, Invalid=4322, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:36:08,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-12 15:36:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 5753. [2021-06-12 15:36:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:08,388 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:08,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:08,389 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:08,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:08,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:08,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:08,394 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:08,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-12 15:36:08,607 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:08,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1644841494, now seen corresponding path program 408 times [2021-06-12 15:36:08,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:08,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941797778] [2021-06-12 15:36:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:08,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:08,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941797778] [2021-06-12 15:36:08,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941797778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:08,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611260123] [2021-06-12 15:36:08,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:09,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:36:09,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:09,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:09,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:09,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611260123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:09,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:09,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:09,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748657203] [2021-06-12 15:36:09,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:09,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:09,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:09,269 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:10,077 INFO L93 Difference]: Finished difference Result 7896 states and 20697 transitions. [2021-06-12 15:36:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:36:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:10,085 INFO L225 Difference]: With dead ends: 7896 [2021-06-12 15:36:10,086 INFO L226 Difference]: Without dead ends: 7626 [2021-06-12 15:36:10,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 932.6ms TimeCoverageRelationStatistics Valid=1394, Invalid=4306, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:36:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-12 15:36:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 5753. [2021-06-12 15:36:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:10,158 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:10,158 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:10,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:10,163 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:10,163 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:10,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-12 15:36:10,363 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash -808779002, now seen corresponding path program 409 times [2021-06-12 15:36:10,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:10,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816649940] [2021-06-12 15:36:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:10,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:10,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816649940] [2021-06-12 15:36:10,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816649940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:10,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773482437] [2021-06-12 15:36:10,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:10,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:10,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:11,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773482437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:11,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:11,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:11,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349850200] [2021-06-12 15:36:11,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:11,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:11,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:11,029 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:11,956 INFO L93 Difference]: Finished difference Result 7846 states and 20597 transitions. [2021-06-12 15:36:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:36:11,956 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:11,964 INFO L225 Difference]: With dead ends: 7846 [2021-06-12 15:36:11,964 INFO L226 Difference]: Without dead ends: 7576 [2021-06-12 15:36:11,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1011.1ms TimeCoverageRelationStatistics Valid=1421, Invalid=4585, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:36:11,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2021-06-12 15:36:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 5753. [2021-06-12 15:36:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:12,039 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:12,039 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:12,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:12,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:12,044 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:12,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:12,260 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:12,261 INFO L82 PathProgramCache]: Analyzing trace with hash 72780180, now seen corresponding path program 410 times [2021-06-12 15:36:12,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:12,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284528219] [2021-06-12 15:36:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:12,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:12,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284528219] [2021-06-12 15:36:12,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284528219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:12,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301307519] [2021-06-12 15:36:12,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:12,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:36:12,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:12,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:12,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301307519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:12,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:12,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300684922] [2021-06-12 15:36:12,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:12,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:12,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:12,928 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:13,822 INFO L93 Difference]: Finished difference Result 7796 states and 20497 transitions. [2021-06-12 15:36:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:36:13,823 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:13,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:13,831 INFO L225 Difference]: With dead ends: 7796 [2021-06-12 15:36:13,831 INFO L226 Difference]: Without dead ends: 7526 [2021-06-12 15:36:13,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 920.6ms TimeCoverageRelationStatistics Valid=1451, Invalid=4555, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:36:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-06-12 15:36:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 5753. [2021-06-12 15:36:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:13,901 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:13,901 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:13,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:13,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:13,906 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:14,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-12 15:36:14,107 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:14,107 INFO L82 PathProgramCache]: Analyzing trace with hash -569594236, now seen corresponding path program 411 times [2021-06-12 15:36:14,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:14,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256327214] [2021-06-12 15:36:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:14,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256327214] [2021-06-12 15:36:14,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256327214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881268950] [2021-06-12 15:36:14,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:14,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:36:14,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:14,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-12 15:36:14,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:14,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881268950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:14,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:14,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:14,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112576523] [2021-06-12 15:36:14,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:14,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:14,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:14,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:14,763 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:15,723 INFO L93 Difference]: Finished difference Result 7746 states and 20397 transitions. [2021-06-12 15:36:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:36:15,724 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:15,732 INFO L225 Difference]: With dead ends: 7746 [2021-06-12 15:36:15,732 INFO L226 Difference]: Without dead ends: 7476 [2021-06-12 15:36:15,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1036.5ms TimeCoverageRelationStatistics Valid=1447, Invalid=4873, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:36:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-06-12 15:36:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 5753. [2021-06-12 15:36:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:15,800 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:15,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:15,801 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:15,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:15,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:15,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:15,806 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:16,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-12 15:36:16,006 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:16,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash -616141166, now seen corresponding path program 412 times [2021-06-12 15:36:16,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:16,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751703753] [2021-06-12 15:36:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:16,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:16,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751703753] [2021-06-12 15:36:16,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751703753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:16,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138592978] [2021-06-12 15:36:16,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:16,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:36:16,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:16,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:16,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:16,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138592978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:16,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:16,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:16,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976910638] [2021-06-12 15:36:16,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:16,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:16,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:16,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:16,636 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:17,507 INFO L93 Difference]: Finished difference Result 7696 states and 20297 transitions. [2021-06-12 15:36:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:36:17,508 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:17,515 INFO L225 Difference]: With dead ends: 7696 [2021-06-12 15:36:17,516 INFO L226 Difference]: Without dead ends: 7426 [2021-06-12 15:36:17,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 973.5ms TimeCoverageRelationStatistics Valid=1524, Invalid=4796, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:36:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-06-12 15:36:17,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 5753. [2021-06-12 15:36:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:17,585 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:17,585 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:17,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:17,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:17,590 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:17,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-12 15:36:17,790 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:17,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:17,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1534525566, now seen corresponding path program 413 times [2021-06-12 15:36:17,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:17,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919902075] [2021-06-12 15:36:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:18,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:18,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919902075] [2021-06-12 15:36:18,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919902075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:18,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137837568] [2021-06-12 15:36:18,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:18,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:36:18,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:18,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:18,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137837568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:18,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:18,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:18,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852687464] [2021-06-12 15:36:18,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:18,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:18,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:18,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:18,467 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:19,527 INFO L93 Difference]: Finished difference Result 7646 states and 20197 transitions. [2021-06-12 15:36:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:36:19,528 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:19,536 INFO L225 Difference]: With dead ends: 7646 [2021-06-12 15:36:19,536 INFO L226 Difference]: Without dead ends: 7376 [2021-06-12 15:36:19,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 1132.8ms TimeCoverageRelationStatistics Valid=1555, Invalid=5087, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:36:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2021-06-12 15:36:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 5753. [2021-06-12 15:36:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:19,607 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:19,607 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:19,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:19,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:19,612 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:19,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-12 15:36:19,813 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:19,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:19,813 INFO L82 PathProgramCache]: Analyzing trace with hash 983750928, now seen corresponding path program 414 times [2021-06-12 15:36:19,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:19,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018356746] [2021-06-12 15:36:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:20,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:20,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018356746] [2021-06-12 15:36:20,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018356746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:20,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215995058] [2021-06-12 15:36:20,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:20,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:36:20,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:20,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:20,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:20,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215995058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:20,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:20,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:20,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920750441] [2021-06-12 15:36:20,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:20,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:20,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:20,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:20,454 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:21,376 INFO L93 Difference]: Finished difference Result 7596 states and 20097 transitions. [2021-06-12 15:36:21,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:36:21,376 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:21,384 INFO L225 Difference]: With dead ends: 7596 [2021-06-12 15:36:21,384 INFO L226 Difference]: Without dead ends: 7326 [2021-06-12 15:36:21,385 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 992.8ms TimeCoverageRelationStatistics Valid=1613, Invalid=5029, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:36:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2021-06-12 15:36:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 5753. [2021-06-12 15:36:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:21,451 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:21,451 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:21,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:21,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:21,456 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:21,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:21,657 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1211574784, now seen corresponding path program 415 times [2021-06-12 15:36:21,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:21,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998452127] [2021-06-12 15:36:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:22,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:22,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998452127] [2021-06-12 15:36:22,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998452127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:22,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889502815] [2021-06-12 15:36:22,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:22,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:22,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889502815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:22,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:22,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:22,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726385518] [2021-06-12 15:36:22,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:22,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:22,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:22,319 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:23,375 INFO L93 Difference]: Finished difference Result 7546 states and 19997 transitions. [2021-06-12 15:36:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:36:23,376 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:23,383 INFO L225 Difference]: With dead ends: 7546 [2021-06-12 15:36:23,383 INFO L226 Difference]: Without dead ends: 7276 [2021-06-12 15:36:23,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1179.7ms TimeCoverageRelationStatistics Valid=1646, Invalid=5326, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:36:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-12 15:36:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 5753. [2021-06-12 15:36:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:23,454 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:23,454 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:23,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:23,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:23,459 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:23,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-12 15:36:23,659 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:23,659 INFO L82 PathProgramCache]: Analyzing trace with hash 298625294, now seen corresponding path program 416 times [2021-06-12 15:36:23,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:23,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124125127] [2021-06-12 15:36:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:23,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:23,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124125127] [2021-06-12 15:36:23,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124125127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:23,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942707128] [2021-06-12 15:36:23,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:24,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:36:24,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:24,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:24,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:24,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942707128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:24,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:24,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:24,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082690517] [2021-06-12 15:36:24,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:24,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:24,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:24,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:24,265 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:25,234 INFO L93 Difference]: Finished difference Result 7496 states and 19897 transitions. [2021-06-12 15:36:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:36:25,234 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:25,242 INFO L225 Difference]: With dead ends: 7496 [2021-06-12 15:36:25,242 INFO L226 Difference]: Without dead ends: 7226 [2021-06-12 15:36:25,243 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 1027.1ms TimeCoverageRelationStatistics Valid=1718, Invalid=5254, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:36:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-06-12 15:36:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 5753. [2021-06-12 15:36:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:25,311 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:25,311 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:25,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:25,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:25,316 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:25,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:25,516 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:25,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:25,516 INFO L82 PathProgramCache]: Analyzing trace with hash 938283518, now seen corresponding path program 417 times [2021-06-12 15:36:25,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:25,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893797913] [2021-06-12 15:36:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:25,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:25,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893797913] [2021-06-12 15:36:25,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893797913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:25,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138266268] [2021-06-12 15:36:25,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:25,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:36:25,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 15:36:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:26,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138266268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:26,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:26,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:26,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115761383] [2021-06-12 15:36:26,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:26,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:26,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:26,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:26,146 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:27,273 INFO L93 Difference]: Finished difference Result 7446 states and 19797 transitions. [2021-06-12 15:36:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:36:27,273 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:27,281 INFO L225 Difference]: With dead ends: 7446 [2021-06-12 15:36:27,281 INFO L226 Difference]: Without dead ends: 7176 [2021-06-12 15:36:27,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 1170.3ms TimeCoverageRelationStatistics Valid=1666, Invalid=5644, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 15:36:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-06-12 15:36:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 5753. [2021-06-12 15:36:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:27,349 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:27,349 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:27,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:27,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:27,354 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:27,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-12 15:36:27,555 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:27,555 INFO L82 PathProgramCache]: Analyzing trace with hash 163364492, now seen corresponding path program 418 times [2021-06-12 15:36:27,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:27,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935210040] [2021-06-12 15:36:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:27,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:27,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935210040] [2021-06-12 15:36:27,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935210040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:27,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360610510] [2021-06-12 15:36:27,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:27,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:36:27,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:27,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:27,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:28,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360610510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:28,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:28,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:28,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221220259] [2021-06-12 15:36:28,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:28,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:28,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:28,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:28,149 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:29,173 INFO L93 Difference]: Finished difference Result 7396 states and 19697 transitions. [2021-06-12 15:36:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:36:29,173 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:29,181 INFO L225 Difference]: With dead ends: 7396 [2021-06-12 15:36:29,181 INFO L226 Difference]: Without dead ends: 7126 [2021-06-12 15:36:29,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1049.3ms TimeCoverageRelationStatistics Valid=1839, Invalid=5471, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 15:36:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-06-12 15:36:29,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 5753. [2021-06-12 15:36:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:29,276 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:29,276 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:29,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:29,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:29,280 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:29,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:29,481 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash -290548868, now seen corresponding path program 419 times [2021-06-12 15:36:29,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:29,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060236304] [2021-06-12 15:36:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:29,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:29,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060236304] [2021-06-12 15:36:29,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060236304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:29,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966966748] [2021-06-12 15:36:29,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:29,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:36:29,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:29,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:30,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966966748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:30,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:30,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:30,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932132434] [2021-06-12 15:36:30,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:30,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:30,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:30,080 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:31,314 INFO L93 Difference]: Finished difference Result 7346 states and 19597 transitions. [2021-06-12 15:36:31,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:36:31,314 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:31,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:31,320 INFO L225 Difference]: With dead ends: 7346 [2021-06-12 15:36:31,320 INFO L226 Difference]: Without dead ends: 7076 [2021-06-12 15:36:31,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 1242.5ms TimeCoverageRelationStatistics Valid=1876, Invalid=5780, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:36:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7076 states. [2021-06-12 15:36:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7076 to 5753. [2021-06-12 15:36:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:31,383 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:31,383 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:31,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:31,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:31,388 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:31,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:31,588 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash 587463050, now seen corresponding path program 420 times [2021-06-12 15:36:31,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:31,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950455140] [2021-06-12 15:36:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:31,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:31,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950455140] [2021-06-12 15:36:31,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950455140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:31,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075900881] [2021-06-12 15:36:31,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:31,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:36:31,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 15:36:31,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:32,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075900881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:32,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:32,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:32,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48431521] [2021-06-12 15:36:32,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:32,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:32,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:32,166 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:33,264 INFO L93 Difference]: Finished difference Result 7296 states and 19497 transitions. [2021-06-12 15:36:33,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:36:33,265 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:33,271 INFO L225 Difference]: With dead ends: 7296 [2021-06-12 15:36:33,271 INFO L226 Difference]: Without dead ends: 7026 [2021-06-12 15:36:33,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 1089.3ms TimeCoverageRelationStatistics Valid=1976, Invalid=5680, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:36:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2021-06-12 15:36:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 5753. [2021-06-12 15:36:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:33,334 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:33,335 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:33,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:33,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:33,339 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:33,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:33,540 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:33,540 INFO L82 PathProgramCache]: Analyzing trace with hash -312591750, now seen corresponding path program 421 times [2021-06-12 15:36:33,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:33,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699513400] [2021-06-12 15:36:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:33,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:33,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699513400] [2021-06-12 15:36:33,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699513400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:33,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271688594] [2021-06-12 15:36:33,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:33,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:34,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271688594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:34,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:34,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:34,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617429926] [2021-06-12 15:36:34,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:34,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:34,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:34,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:34,125 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:35,395 INFO L93 Difference]: Finished difference Result 7246 states and 19397 transitions. [2021-06-12 15:36:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:36:35,395 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:35,402 INFO L225 Difference]: With dead ends: 7246 [2021-06-12 15:36:35,402 INFO L226 Difference]: Without dead ends: 6976 [2021-06-12 15:36:35,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 1273.8ms TimeCoverageRelationStatistics Valid=2015, Invalid=5995, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 15:36:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6976 states. [2021-06-12 15:36:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6976 to 5753. [2021-06-12 15:36:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:35,468 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:35,468 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:35,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:35,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:35,473 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:35,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:35,674 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:35,674 INFO L82 PathProgramCache]: Analyzing trace with hash -741656056, now seen corresponding path program 422 times [2021-06-12 15:36:35,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:35,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484805537] [2021-06-12 15:36:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:35,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:35,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484805537] [2021-06-12 15:36:35,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484805537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:35,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719189491] [2021-06-12 15:36:35,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:36,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:36:36,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:36,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:36,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719189491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:36,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:36,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:36,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897732401] [2021-06-12 15:36:36,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:36,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:36,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:36,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:36,248 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:37,381 INFO L93 Difference]: Finished difference Result 7196 states and 19297 transitions. [2021-06-12 15:36:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:36:37,381 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:37,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:37,388 INFO L225 Difference]: With dead ends: 7196 [2021-06-12 15:36:37,388 INFO L226 Difference]: Without dead ends: 6926 [2021-06-12 15:36:37,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 1143.5ms TimeCoverageRelationStatistics Valid=2129, Invalid=5881, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 15:36:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-06-12 15:36:37,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 5753. [2021-06-12 15:36:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:37,454 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:37,454 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:37,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:37,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:37,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:37,459 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:37,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:37,659 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:37,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1427839240, now seen corresponding path program 423 times [2021-06-12 15:36:37,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:37,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530078856] [2021-06-12 15:36:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:37,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:37,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530078856] [2021-06-12 15:36:37,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530078856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:37,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030452400] [2021-06-12 15:36:37,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:38,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:36:38,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:38,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 15:36:38,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:38,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030452400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:38,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:38,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:38,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175431932] [2021-06-12 15:36:38,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:38,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:38,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:38,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:38,274 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:39,592 INFO L93 Difference]: Finished difference Result 7146 states and 19197 transitions. [2021-06-12 15:36:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:36:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:39,599 INFO L225 Difference]: With dead ends: 7146 [2021-06-12 15:36:39,599 INFO L226 Difference]: Without dead ends: 6876 [2021-06-12 15:36:39,599 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 1281.9ms TimeCoverageRelationStatistics Valid=2002, Invalid=6370, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 15:36:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-06-12 15:36:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5753. [2021-06-12 15:36:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:39,666 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:39,666 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:39,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:39,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:39,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:39,671 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:39,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-12 15:36:39,873 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:39,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1512873978, now seen corresponding path program 424 times [2021-06-12 15:36:39,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:39,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977946925] [2021-06-12 15:36:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:40,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:40,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977946925] [2021-06-12 15:36:40,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977946925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:40,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892329715] [2021-06-12 15:36:40,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:40,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:36:40,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:40,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892329715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:40,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:40,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:40,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174598659] [2021-06-12 15:36:40,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:40,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:40,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:40,445 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:41,672 INFO L93 Difference]: Finished difference Result 7096 states and 19097 transitions. [2021-06-12 15:36:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:36:41,672 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:41,679 INFO L225 Difference]: With dead ends: 7096 [2021-06-12 15:36:41,679 INFO L226 Difference]: Without dead ends: 6826 [2021-06-12 15:36:41,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 1179.3ms TimeCoverageRelationStatistics Valid=2298, Invalid=6074, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 15:36:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2021-06-12 15:36:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 5753. [2021-06-12 15:36:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:41,744 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:41,744 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:41,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:41,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:41,749 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:41,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-12 15:36:41,949 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:41,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1581025034, now seen corresponding path program 425 times [2021-06-12 15:36:41,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:41,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421135743] [2021-06-12 15:36:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:42,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:42,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421135743] [2021-06-12 15:36:42,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421135743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:42,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312888773] [2021-06-12 15:36:42,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:42,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:36:42,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:42,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:42,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:42,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312888773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:42,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:42,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:42,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467225372] [2021-06-12 15:36:42,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:42,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:42,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:42,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:42,544 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:43,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:43,985 INFO L93 Difference]: Finished difference Result 7046 states and 18997 transitions. [2021-06-12 15:36:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 15:36:43,985 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:43,992 INFO L225 Difference]: With dead ends: 7046 [2021-06-12 15:36:43,993 INFO L226 Difference]: Without dead ends: 6776 [2021-06-12 15:36:43,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 1376.8ms TimeCoverageRelationStatistics Valid=2341, Invalid=6401, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 15:36:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2021-06-12 15:36:44,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 5753. [2021-06-12 15:36:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:44,059 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:44,059 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:44,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:44,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:44,064 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:44,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 15:36:44,264 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:44,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1416973188, now seen corresponding path program 426 times [2021-06-12 15:36:44,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:44,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659599028] [2021-06-12 15:36:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:44,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:44,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659599028] [2021-06-12 15:36:44,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659599028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:44,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108919412] [2021-06-12 15:36:44,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:44,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:36:44,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:44,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:36:44,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:44,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108919412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:44,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:44,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:44,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146920109] [2021-06-12 15:36:44,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:44,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:44,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:44,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:44,998 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:46,180 INFO L93 Difference]: Finished difference Result 6996 states and 18897 transitions. [2021-06-12 15:36:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 15:36:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:46,187 INFO L225 Difference]: With dead ends: 6996 [2021-06-12 15:36:46,187 INFO L226 Difference]: Without dead ends: 6726 [2021-06-12 15:36:46,188 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 1187.2ms TimeCoverageRelationStatistics Valid=2483, Invalid=6259, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 15:36:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2021-06-12 15:36:46,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 5753. [2021-06-12 15:36:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-12 15:36:46,253 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-12 15:36:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:46,254 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-12 15:36:46,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-12 15:36:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:46,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:46,259 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:46,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:46,459 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:46,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1846726772, now seen corresponding path program 427 times [2021-06-12 15:36:46,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:46,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540921421] [2021-06-12 15:36:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:46,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:46,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540921421] [2021-06-12 15:36:46,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540921421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:46,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775296164] [2021-06-12 15:36:46,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:46,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:46,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:47,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775296164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:47,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:47,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:36:47,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254038225] [2021-06-12 15:36:47,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:47,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:47,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:47,059 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:48,507 INFO L93 Difference]: Finished difference Result 7006 states and 18947 transitions. [2021-06-12 15:36:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 15:36:48,507 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:48,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:48,515 INFO L225 Difference]: With dead ends: 7006 [2021-06-12 15:36:48,515 INFO L226 Difference]: Without dead ends: 6736 [2021-06-12 15:36:48,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 1410.5ms TimeCoverageRelationStatistics Valid=2528, Invalid=6592, Unknown=0, NotChecked=0, Total=9120 [2021-06-12 15:36:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2021-06-12 15:36:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 5753. [2021-06-12 15:36:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.831710709318498) internal successors, (16288), 5752 states have internal predecessors, (16288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16288 transitions. [2021-06-12 15:36:48,593 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16288 transitions. Word has length 175 [2021-06-12 15:36:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:48,593 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16288 transitions. [2021-06-12 15:36:48,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16288 transitions. [2021-06-12 15:36:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:48,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:48,598 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:48,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-12 15:36:48,798 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:48,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1788992642, now seen corresponding path program 428 times [2021-06-12 15:36:48,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:48,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046529179] [2021-06-12 15:36:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:49,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:49,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046529179] [2021-06-12 15:36:49,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046529179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:49,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524073105] [2021-06-12 15:36:49,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:49,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:36:49,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:49,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:36:49,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:49,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524073105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:49,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:49,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:49,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578243068] [2021-06-12 15:36:49,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:49,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:49,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:49,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:49,360 INFO L87 Difference]: Start difference. First operand 5753 states and 16288 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:50,613 INFO L93 Difference]: Finished difference Result 7748 states and 21071 transitions. [2021-06-12 15:36:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 15:36:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:50,621 INFO L225 Difference]: With dead ends: 7748 [2021-06-12 15:36:50,621 INFO L226 Difference]: Without dead ends: 7478 [2021-06-12 15:36:50,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2658 ImplicationChecksByTransitivity, 1233.4ms TimeCoverageRelationStatistics Valid=2685, Invalid=6435, Unknown=0, NotChecked=0, Total=9120 [2021-06-12 15:36:50,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-06-12 15:36:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 5933. [2021-06-12 15:36:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5933 states, 5932 states have (on average 2.8400202292650034) internal successors, (16847), 5932 states have internal predecessors, (16847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5933 states to 5933 states and 16847 transitions. [2021-06-12 15:36:50,690 INFO L78 Accepts]: Start accepts. Automaton has 5933 states and 16847 transitions. Word has length 175 [2021-06-12 15:36:50,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:50,690 INFO L482 AbstractCegarLoop]: Abstraction has 5933 states and 16847 transitions. [2021-06-12 15:36:50,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5933 states and 16847 transitions. [2021-06-12 15:36:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:50,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:50,695 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:50,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-12 15:36:50,896 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:50,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1811335892, now seen corresponding path program 429 times [2021-06-12 15:36:50,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:50,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341935327] [2021-06-12 15:36:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:51,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:51,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341935327] [2021-06-12 15:36:51,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341935327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:51,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046855403] [2021-06-12 15:36:51,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:51,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:36:51,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:36:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:51,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046855403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:51,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:51,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:51,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948350785] [2021-06-12 15:36:51,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:51,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:51,479 INFO L87 Difference]: Start difference. First operand 5933 states and 16847 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:52,920 INFO L93 Difference]: Finished difference Result 7210 states and 19721 transitions. [2021-06-12 15:36:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 15:36:52,920 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-12 15:36:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:52,926 INFO L225 Difference]: With dead ends: 7210 [2021-06-12 15:36:52,926 INFO L226 Difference]: Without dead ends: 6721 [2021-06-12 15:36:52,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 1411.9ms TimeCoverageRelationStatistics Valid=2422, Invalid=6890, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 15:36:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-06-12 15:36:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 5878. [2021-06-12 15:36:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 2.8386932108218477) internal successors, (16683), 5877 states have internal predecessors, (16683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16683 transitions. [2021-06-12 15:36:52,990 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16683 transitions. Word has length 175 [2021-06-12 15:36:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:52,990 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16683 transitions. [2021-06-12 15:36:52,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16683 transitions. [2021-06-12 15:36:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:36:52,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:52,995 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:53,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-12 15:36:53,196 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:53,196 INFO L82 PathProgramCache]: Analyzing trace with hash -359446824, now seen corresponding path program 430 times [2021-06-12 15:36:53,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:53,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949226398] [2021-06-12 15:36:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:53,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:53,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949226398] [2021-06-12 15:36:53,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949226398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:53,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696853821] [2021-06-12 15:36:53,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:53,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:36:53,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:53,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:36:53,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:53,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696853821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:53,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:53,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2021-06-12 15:36:53,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613646732] [2021-06-12 15:36:53,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:36:53,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:53,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:36:53,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:36:53,903 INFO L87 Difference]: Start difference. First operand 5878 states and 16683 transitions. Second operand has 39 states, 39 states have (on average 5.384615384615385) internal successors, (210), 39 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:54,695 INFO L93 Difference]: Finished difference Result 7268 states and 19783 transitions. [2021-06-12 15:36:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:36:54,695 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.384615384615385) internal successors, (210), 39 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:36:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:54,702 INFO L225 Difference]: With dead ends: 7268 [2021-06-12 15:36:54,702 INFO L226 Difference]: Without dead ends: 6934 [2021-06-12 15:36:54,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 971.0ms TimeCoverageRelationStatistics Valid=1538, Invalid=4012, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:36:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-06-12 15:36:54,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 5963. [2021-06-12 15:36:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 5962 states have (on average 2.8267359946326738) internal successors, (16853), 5962 states have internal predecessors, (16853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 16853 transitions. [2021-06-12 15:36:54,775 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 16853 transitions. Word has length 180 [2021-06-12 15:36:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:54,775 INFO L482 AbstractCegarLoop]: Abstraction has 5963 states and 16853 transitions. [2021-06-12 15:36:54,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.384615384615385) internal successors, (210), 39 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 16853 transitions. [2021-06-12 15:36:54,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:36:54,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:54,781 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:54,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:54,981 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:54,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:54,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1425719172, now seen corresponding path program 431 times [2021-06-12 15:36:54,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:54,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866982207] [2021-06-12 15:36:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:55,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:55,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866982207] [2021-06-12 15:36:55,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866982207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067591615] [2021-06-12 15:36:55,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:55,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:36:55,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:55,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:36:55,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:55,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067591615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:55,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:55,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:36:55,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300068864] [2021-06-12 15:36:55,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:55,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:55,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:55,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:55,678 INFO L87 Difference]: Start difference. First operand 5963 states and 16853 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:56,351 INFO L93 Difference]: Finished difference Result 8561 states and 22177 transitions. [2021-06-12 15:36:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:36:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:36:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:56,358 INFO L225 Difference]: With dead ends: 8561 [2021-06-12 15:36:56,359 INFO L226 Difference]: Without dead ends: 8291 [2021-06-12 15:36:56,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 879.6ms TimeCoverageRelationStatistics Valid=1335, Invalid=3357, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:36:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8291 states. [2021-06-12 15:36:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8291 to 5978. [2021-06-12 15:36:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:56,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:36:56,428 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:36:56,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:56,429 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:36:56,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:56,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:36:56,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:36:56,434 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:56,434 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:56,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-06-12 15:36:56,634 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:56,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1305889132, now seen corresponding path program 432 times [2021-06-12 15:36:56,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:56,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257724590] [2021-06-12 15:36:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:57,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:57,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257724590] [2021-06-12 15:36:57,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257724590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:57,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722560150] [2021-06-12 15:36:57,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:57,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:36:57,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:36:57,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:57,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722560150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:57,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:57,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:36:57,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40737833] [2021-06-12 15:36:57,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:36:57,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:57,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:36:57,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:36:57,369 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:58,161 INFO L93 Difference]: Finished difference Result 8446 states and 21947 transitions. [2021-06-12 15:36:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:36:58,161 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:36:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:58,168 INFO L225 Difference]: With dead ends: 8446 [2021-06-12 15:36:58,169 INFO L226 Difference]: Without dead ends: 8176 [2021-06-12 15:36:58,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 978.3ms TimeCoverageRelationStatistics Valid=1424, Invalid=3832, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:36:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-12 15:36:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 5978. [2021-06-12 15:36:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:36:58,237 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:36:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:58,237 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:36:58,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:36:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:36:58,242 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:58,242 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:36:58,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:58,443 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1296324102, now seen corresponding path program 433 times [2021-06-12 15:36:58,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:58,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863260512] [2021-06-12 15:36:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:58,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:58,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863260512] [2021-06-12 15:36:58,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863260512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:58,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192875156] [2021-06-12 15:36:58,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:58,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:36:58,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:36:59,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192875156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:59,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:59,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:36:59,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873719491] [2021-06-12 15:36:59,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:36:59,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:59,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:36:59,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:36:59,115 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:59,900 INFO L93 Difference]: Finished difference Result 8421 states and 21897 transitions. [2021-06-12 15:36:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:36:59,900 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:36:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:59,907 INFO L225 Difference]: With dead ends: 8421 [2021-06-12 15:36:59,907 INFO L226 Difference]: Without dead ends: 8151 [2021-06-12 15:36:59,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 953.5ms TimeCoverageRelationStatistics Valid=1329, Invalid=3641, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:36:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-12 15:36:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 5978. [2021-06-12 15:36:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:36:59,974 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:36:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:59,975 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:36:59,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:36:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:36:59,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:59,980 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:00,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-12 15:37:00,180 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:00,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2057707242, now seen corresponding path program 434 times [2021-06-12 15:37:00,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:00,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75153825] [2021-06-12 15:37:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:00,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:00,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75153825] [2021-06-12 15:37:00,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75153825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:00,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286071333] [2021-06-12 15:37:00,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:00,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:37:00,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:00,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286071333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:00,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:00,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:00,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510707658] [2021-06-12 15:37:00,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:00,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:00,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:00,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:00,890 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:01,783 INFO L93 Difference]: Finished difference Result 8371 states and 21797 transitions. [2021-06-12 15:37:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:37:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:01,790 INFO L225 Difference]: With dead ends: 8371 [2021-06-12 15:37:01,791 INFO L226 Difference]: Without dead ends: 8101 [2021-06-12 15:37:01,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1014.7ms TimeCoverageRelationStatistics Valid=1426, Invalid=4124, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:37:01,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-06-12 15:37:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 5978. [2021-06-12 15:37:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:01,859 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:01,859 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:01,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:01,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:01,864 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:02,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-12 15:37:02,065 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash -605931272, now seen corresponding path program 435 times [2021-06-12 15:37:02,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:02,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763710785] [2021-06-12 15:37:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:02,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:02,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763710785] [2021-06-12 15:37:02,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763710785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:02,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328639691] [2021-06-12 15:37:02,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:02,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:37:02,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:02,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:02,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:02,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328639691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:02,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:02,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:02,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137790902] [2021-06-12 15:37:02,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:02,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:02,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:02,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:02,745 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:03,620 INFO L93 Difference]: Finished difference Result 8321 states and 21697 transitions. [2021-06-12 15:37:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:37:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:03,627 INFO L225 Difference]: With dead ends: 8321 [2021-06-12 15:37:03,627 INFO L226 Difference]: Without dead ends: 8051 [2021-06-12 15:37:03,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 962.7ms TimeCoverageRelationStatistics Valid=1339, Invalid=3917, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:37:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-12 15:37:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 5978. [2021-06-12 15:37:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:03,693 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:03,693 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:03,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:03,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:03,698 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:03,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-12 15:37:03,899 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1451419160, now seen corresponding path program 436 times [2021-06-12 15:37:03,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:03,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858910912] [2021-06-12 15:37:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:04,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:04,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858910912] [2021-06-12 15:37:04,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858910912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:04,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125311941] [2021-06-12 15:37:04,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:04,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:37:04,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:04,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:04,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:04,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125311941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:04,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:04,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:04,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434561155] [2021-06-12 15:37:04,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:04,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:04,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:04,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:04,597 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:05,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:05,515 INFO L93 Difference]: Finished difference Result 8271 states and 21597 transitions. [2021-06-12 15:37:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:37:05,516 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:05,522 INFO L225 Difference]: With dead ends: 8271 [2021-06-12 15:37:05,522 INFO L226 Difference]: Without dead ends: 8001 [2021-06-12 15:37:05,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1043.3ms TimeCoverageRelationStatistics Valid=1444, Invalid=4408, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:37:05,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-06-12 15:37:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 5978. [2021-06-12 15:37:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:05,593 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:05,594 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:05,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:05,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:05,599 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:05,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-12 15:37:05,800 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:05,800 INFO L82 PathProgramCache]: Analyzing trace with hash 937545078, now seen corresponding path program 437 times [2021-06-12 15:37:05,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:05,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91282104] [2021-06-12 15:37:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:06,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:06,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91282104] [2021-06-12 15:37:06,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91282104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:06,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071203162] [2021-06-12 15:37:06,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:06,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:37:06,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:06,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:06,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071203162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:06,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:06,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:06,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480659915] [2021-06-12 15:37:06,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:06,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:06,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:06,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:06,460 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:07,390 INFO L93 Difference]: Finished difference Result 8221 states and 21497 transitions. [2021-06-12 15:37:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:37:07,390 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:07,397 INFO L225 Difference]: With dead ends: 8221 [2021-06-12 15:37:07,397 INFO L226 Difference]: Without dead ends: 7951 [2021-06-12 15:37:07,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 949.2ms TimeCoverageRelationStatistics Valid=1365, Invalid=4185, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:37:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-12 15:37:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 5978. [2021-06-12 15:37:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:07,465 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:07,466 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:07,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:07,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:07,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:07,471 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:07,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-12 15:37:07,677 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:07,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:07,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1820596838, now seen corresponding path program 438 times [2021-06-12 15:37:07,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:07,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198745745] [2021-06-12 15:37:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:08,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:08,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198745745] [2021-06-12 15:37:08,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198745745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:08,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759401771] [2021-06-12 15:37:08,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:08,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:37:08,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:08,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:08,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759401771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:08,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:08,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:08,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606774735] [2021-06-12 15:37:08,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:08,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:08,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:08,382 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:09,336 INFO L93 Difference]: Finished difference Result 8171 states and 21397 transitions. [2021-06-12 15:37:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:37:09,336 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:09,343 INFO L225 Difference]: With dead ends: 8171 [2021-06-12 15:37:09,343 INFO L226 Difference]: Without dead ends: 7901 [2021-06-12 15:37:09,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1094.5ms TimeCoverageRelationStatistics Valid=1478, Invalid=4684, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:37:09,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-06-12 15:37:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 5978. [2021-06-12 15:37:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:09,411 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:09,411 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:09,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:09,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:09,416 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:09,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:09,617 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash -71612556, now seen corresponding path program 439 times [2021-06-12 15:37:09,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:09,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975192080] [2021-06-12 15:37:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:09,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:09,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975192080] [2021-06-12 15:37:09,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975192080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:09,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547147879] [2021-06-12 15:37:09,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:10,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:10,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:10,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547147879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:10,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:10,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:10,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777085145] [2021-06-12 15:37:10,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:10,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:10,263 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:11,113 INFO L93 Difference]: Finished difference Result 8121 states and 21297 transitions. [2021-06-12 15:37:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:37:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:11,120 INFO L225 Difference]: With dead ends: 8121 [2021-06-12 15:37:11,120 INFO L226 Difference]: Without dead ends: 7851 [2021-06-12 15:37:11,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 952.2ms TimeCoverageRelationStatistics Valid=1407, Invalid=4445, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:37:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-06-12 15:37:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 5978. [2021-06-12 15:37:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:11,187 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:11,187 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:11,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:11,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:11,193 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:11,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-12 15:37:11,393 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1769734244, now seen corresponding path program 440 times [2021-06-12 15:37:11,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:11,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741020059] [2021-06-12 15:37:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:11,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:11,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741020059] [2021-06-12 15:37:11,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741020059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:11,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273936332] [2021-06-12 15:37:11,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:11,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:37:11,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:11,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:11,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:12,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273936332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:12,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:12,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:12,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508658943] [2021-06-12 15:37:12,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:12,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:12,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:12,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:12,066 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:13,080 INFO L93 Difference]: Finished difference Result 8071 states and 21197 transitions. [2021-06-12 15:37:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:37:13,080 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:13,086 INFO L225 Difference]: With dead ends: 8071 [2021-06-12 15:37:13,087 INFO L226 Difference]: Without dead ends: 7801 [2021-06-12 15:37:13,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1103.6ms TimeCoverageRelationStatistics Valid=1528, Invalid=4952, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:37:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-06-12 15:37:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 5978. [2021-06-12 15:37:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:13,152 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:13,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:13,152 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:13,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:13,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:13,157 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:13,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-12 15:37:13,357 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:13,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1643673870, now seen corresponding path program 441 times [2021-06-12 15:37:13,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:13,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882674680] [2021-06-12 15:37:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:13,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:13,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882674680] [2021-06-12 15:37:13,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882674680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:13,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727639096] [2021-06-12 15:37:13,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:13,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:37:13,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:13,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 15:37:13,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:13,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727639096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:13,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:13,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:13,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459082964] [2021-06-12 15:37:13,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:13,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:13,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:13,998 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:14,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:14,912 INFO L93 Difference]: Finished difference Result 8021 states and 21097 transitions. [2021-06-12 15:37:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:37:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:14,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:14,919 INFO L225 Difference]: With dead ends: 8021 [2021-06-12 15:37:14,919 INFO L226 Difference]: Without dead ends: 7751 [2021-06-12 15:37:14,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1009.9ms TimeCoverageRelationStatistics Valid=1465, Invalid=4697, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:37:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-06-12 15:37:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 5978. [2021-06-12 15:37:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:14,987 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:14,987 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:14,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:14,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:14,992 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:15,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-12 15:37:15,193 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:15,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:15,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2008919010, now seen corresponding path program 442 times [2021-06-12 15:37:15,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:15,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630133143] [2021-06-12 15:37:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:15,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:15,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630133143] [2021-06-12 15:37:15,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630133143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:15,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858845935] [2021-06-12 15:37:15,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:15,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:37:15,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:15,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:15,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858845935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:15,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:15,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:15,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532497470] [2021-06-12 15:37:15,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:15,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:15,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:15,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:15,843 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:16,935 INFO L93 Difference]: Finished difference Result 7971 states and 20997 transitions. [2021-06-12 15:37:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:37:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:16,943 INFO L225 Difference]: With dead ends: 7971 [2021-06-12 15:37:16,943 INFO L226 Difference]: Without dead ends: 7701 [2021-06-12 15:37:16,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 1168.4ms TimeCoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:37:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-06-12 15:37:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 5978. [2021-06-12 15:37:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:17,013 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:17,013 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:17,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:17,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:17,018 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:17,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:17,218 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:17,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:17,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1962372080, now seen corresponding path program 443 times [2021-06-12 15:37:17,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:17,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634254742] [2021-06-12 15:37:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:17,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:17,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634254742] [2021-06-12 15:37:17,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634254742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:17,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473890571] [2021-06-12 15:37:17,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:17,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:37:17,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:17,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:17,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:17,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473890571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:17,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:17,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:17,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301368745] [2021-06-12 15:37:17,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:17,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:17,847 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:18,790 INFO L93 Difference]: Finished difference Result 7921 states and 20897 transitions. [2021-06-12 15:37:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:37:18,790 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:18,798 INFO L225 Difference]: With dead ends: 7921 [2021-06-12 15:37:18,798 INFO L226 Difference]: Without dead ends: 7651 [2021-06-12 15:37:18,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1035.4ms TimeCoverageRelationStatistics Valid=1539, Invalid=4941, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:37:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-06-12 15:37:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 5978. [2021-06-12 15:37:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:18,867 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:18,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:18,868 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:18,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:18,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:18,873 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:19,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:19,080 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1043987680, now seen corresponding path program 444 times [2021-06-12 15:37:19,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:19,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022072841] [2021-06-12 15:37:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:19,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:19,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022072841] [2021-06-12 15:37:19,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022072841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:19,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332031114] [2021-06-12 15:37:19,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:19,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:37:19,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:19,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332031114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:19,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:19,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:19,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470213180] [2021-06-12 15:37:19,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:19,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:19,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:19,737 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:20,858 INFO L93 Difference]: Finished difference Result 7871 states and 20797 transitions. [2021-06-12 15:37:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:37:20,858 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:20,865 INFO L225 Difference]: With dead ends: 7871 [2021-06-12 15:37:20,866 INFO L226 Difference]: Without dead ends: 7601 [2021-06-12 15:37:20,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1210.0ms TimeCoverageRelationStatistics Valid=1676, Invalid=5464, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:37:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-06-12 15:37:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 5978. [2021-06-12 15:37:20,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:20,937 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:20,938 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:20,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:20,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:20,943 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:21,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-12 15:37:21,143 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:21,143 INFO L82 PathProgramCache]: Analyzing trace with hash -732703122, now seen corresponding path program 445 times [2021-06-12 15:37:21,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:21,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691756992] [2021-06-12 15:37:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:21,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691756992] [2021-06-12 15:37:21,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691756992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813896423] [2021-06-12 15:37:21,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:21,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:21,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:21,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813896423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:21,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:21,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:21,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71507080] [2021-06-12 15:37:21,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:21,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:21,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:21,756 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:22,839 INFO L93 Difference]: Finished difference Result 7821 states and 20697 transitions. [2021-06-12 15:37:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:37:22,840 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:22,847 INFO L225 Difference]: With dead ends: 7821 [2021-06-12 15:37:22,847 INFO L226 Difference]: Without dead ends: 7551 [2021-06-12 15:37:22,848 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 1080.4ms TimeCoverageRelationStatistics Valid=1629, Invalid=5177, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:37:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-12 15:37:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 5978. [2021-06-12 15:37:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:22,917 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:22,918 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:22,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:22,922 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:22,923 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:23,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:23,123 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:23,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:23,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1366938462, now seen corresponding path program 446 times [2021-06-12 15:37:23,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:23,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735354303] [2021-06-12 15:37:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:23,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:23,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735354303] [2021-06-12 15:37:23,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735354303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:23,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124442572] [2021-06-12 15:37:23,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:23,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:37:23,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:23,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:23,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:23,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124442572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:23,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:23,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:23,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379924527] [2021-06-12 15:37:23,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:23,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:23,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:23,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:23,759 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:24,986 INFO L93 Difference]: Finished difference Result 7771 states and 20597 transitions. [2021-06-12 15:37:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:37:24,986 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:24,994 INFO L225 Difference]: With dead ends: 7771 [2021-06-12 15:37:24,995 INFO L226 Difference]: Without dead ends: 7501 [2021-06-12 15:37:24,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 1267.5ms TimeCoverageRelationStatistics Valid=1774, Invalid=5708, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:37:25,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-06-12 15:37:25,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 5978. [2021-06-12 15:37:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:25,070 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:25,070 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:25,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:25,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:25,075 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:25,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:25,275 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1417828756, now seen corresponding path program 447 times [2021-06-12 15:37:25,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:25,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227507198] [2021-06-12 15:37:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:25,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:25,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227507198] [2021-06-12 15:37:25,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227507198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:25,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938028779] [2021-06-12 15:37:25,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:25,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:37:25,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:25,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 15:37:25,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:25,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938028779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:25,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:25,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:25,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333107352] [2021-06-12 15:37:25,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:25,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:25,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:25,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:25,910 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:26,991 INFO L93 Difference]: Finished difference Result 7721 states and 20497 transitions. [2021-06-12 15:37:26,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:37:26,992 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:27,000 INFO L225 Difference]: With dead ends: 7721 [2021-06-12 15:37:27,000 INFO L226 Difference]: Without dead ends: 7451 [2021-06-12 15:37:27,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1066.8ms TimeCoverageRelationStatistics Valid=1735, Invalid=5405, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:37:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-06-12 15:37:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 5978. [2021-06-12 15:37:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:27,072 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:27,072 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:27,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:27,077 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:27,077 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:27,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-12 15:37:27,278 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:27,278 INFO L82 PathProgramCache]: Analyzing trace with hash -778170532, now seen corresponding path program 448 times [2021-06-12 15:37:27,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:27,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072637679] [2021-06-12 15:37:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:27,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:27,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072637679] [2021-06-12 15:37:27,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072637679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:27,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640570700] [2021-06-12 15:37:27,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:27,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:37:27,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:27,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:27,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:27,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640570700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:27,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:27,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:27,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663410246] [2021-06-12 15:37:27,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:27,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:27,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:27,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:27,935 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:29,267 INFO L93 Difference]: Finished difference Result 7671 states and 20397 transitions. [2021-06-12 15:37:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:37:29,268 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:29,276 INFO L225 Difference]: With dead ends: 7671 [2021-06-12 15:37:29,276 INFO L226 Difference]: Without dead ends: 7401 [2021-06-12 15:37:29,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1311.1ms TimeCoverageRelationStatistics Valid=1888, Invalid=5944, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:37:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-06-12 15:37:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 5978. [2021-06-12 15:37:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:29,348 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:29,348 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:29,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:29,348 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:29,353 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:29,353 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:29,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-12 15:37:29,553 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:29,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1553089558, now seen corresponding path program 449 times [2021-06-12 15:37:29,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:29,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884838581] [2021-06-12 15:37:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:29,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:29,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884838581] [2021-06-12 15:37:29,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884838581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:29,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002534418] [2021-06-12 15:37:29,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:29,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:37:29,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:29,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:30,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002534418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:30,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:30,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:30,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547980802] [2021-06-12 15:37:30,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:30,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:30,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:30,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:30,173 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:31,278 INFO L93 Difference]: Finished difference Result 7621 states and 20297 transitions. [2021-06-12 15:37:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:37:31,279 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:31,287 INFO L225 Difference]: With dead ends: 7621 [2021-06-12 15:37:31,287 INFO L226 Difference]: Without dead ends: 7351 [2021-06-12 15:37:31,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 1119.9ms TimeCoverageRelationStatistics Valid=1857, Invalid=5625, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:37:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-06-12 15:37:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 5978. [2021-06-12 15:37:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:31,377 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:31,377 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:31,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:31,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:31,382 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:31,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:31,583 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2007002918, now seen corresponding path program 450 times [2021-06-12 15:37:31,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:31,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574476128] [2021-06-12 15:37:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:31,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:31,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574476128] [2021-06-12 15:37:31,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574476128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:31,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265898770] [2021-06-12 15:37:31,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:31,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:37:31,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:31,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 15:37:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:32,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265898770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:32,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:32,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:32,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042255682] [2021-06-12 15:37:32,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:32,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:32,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:32,211 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:33,488 INFO L93 Difference]: Finished difference Result 7571 states and 20197 transitions. [2021-06-12 15:37:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:37:33,489 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:33,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:33,495 INFO L225 Difference]: With dead ends: 7571 [2021-06-12 15:37:33,495 INFO L226 Difference]: Without dead ends: 7301 [2021-06-12 15:37:33,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 1263.2ms TimeCoverageRelationStatistics Valid=1780, Invalid=6052, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:37:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-06-12 15:37:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 5978. [2021-06-12 15:37:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:33,559 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:33,559 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:33,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:33,559 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:33,564 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:33,564 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:33,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-12 15:37:33,764 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1128991000, now seen corresponding path program 451 times [2021-06-12 15:37:33,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:33,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597302618] [2021-06-12 15:37:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:34,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:34,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597302618] [2021-06-12 15:37:34,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597302618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:34,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444024925] [2021-06-12 15:37:34,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:34,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444024925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:34,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:34,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:34,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281397485] [2021-06-12 15:37:34,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:34,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:34,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:34,353 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:35,525 INFO L93 Difference]: Finished difference Result 7521 states and 20097 transitions. [2021-06-12 15:37:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:37:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:35,533 INFO L225 Difference]: With dead ends: 7521 [2021-06-12 15:37:35,533 INFO L226 Difference]: Without dead ends: 7251 [2021-06-12 15:37:35,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 1139.3ms TimeCoverageRelationStatistics Valid=1995, Invalid=5837, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:37:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2021-06-12 15:37:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 5978. [2021-06-12 15:37:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:35,605 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:35,605 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:35,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:35,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:35,611 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:35,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-12 15:37:35,811 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:35,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2029045800, now seen corresponding path program 452 times [2021-06-12 15:37:35,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:35,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723660238] [2021-06-12 15:37:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:36,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723660238] [2021-06-12 15:37:36,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723660238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354176022] [2021-06-12 15:37:36,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:36,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:37:36,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:36,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:36,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:36,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354176022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:36,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:36,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:36,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163431689] [2021-06-12 15:37:36,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:36,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:36,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:36,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:36,424 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:37,878 INFO L93 Difference]: Finished difference Result 7471 states and 19997 transitions. [2021-06-12 15:37:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:37:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:37,886 INFO L225 Difference]: With dead ends: 7471 [2021-06-12 15:37:37,886 INFO L226 Difference]: Without dead ends: 7201 [2021-06-12 15:37:37,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1419.0ms TimeCoverageRelationStatistics Valid=2164, Invalid=6392, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:37:37,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2021-06-12 15:37:37,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 5978. [2021-06-12 15:37:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:37,956 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:37,956 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:37,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:37,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:37,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:37,962 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:38,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:38,163 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1836857190, now seen corresponding path program 453 times [2021-06-12 15:37:38,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:38,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548506810] [2021-06-12 15:37:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:38,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:38,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548506810] [2021-06-12 15:37:38,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548506810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:38,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685864347] [2021-06-12 15:37:38,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:38,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:37:38,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:38,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 15:37:38,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:38,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685864347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:38,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:38,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:38,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291778989] [2021-06-12 15:37:38,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:38,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:38,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:38,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:38,766 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:39,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:39,965 INFO L93 Difference]: Finished difference Result 7421 states and 19897 transitions. [2021-06-12 15:37:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:37:39,966 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:39,973 INFO L225 Difference]: With dead ends: 7421 [2021-06-12 15:37:39,973 INFO L226 Difference]: Without dead ends: 7151 [2021-06-12 15:37:39,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 1186.7ms TimeCoverageRelationStatistics Valid=2149, Invalid=6041, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:37:39,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-12 15:37:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5978. [2021-06-12 15:37:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:40,042 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:40,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:40,042 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:40,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:40,047 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:40,047 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:40,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable461 [2021-06-12 15:37:40,248 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:40,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1150674006, now seen corresponding path program 454 times [2021-06-12 15:37:40,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:40,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895526609] [2021-06-12 15:37:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:40,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:40,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895526609] [2021-06-12 15:37:40,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895526609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:40,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693705515] [2021-06-12 15:37:40,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:40,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:37:40,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:40,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:40,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:40,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693705515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:40,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:40,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:40,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104140655] [2021-06-12 15:37:40,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:40,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:40,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:40,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:40,878 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:42,353 INFO L93 Difference]: Finished difference Result 7371 states and 19797 transitions. [2021-06-12 15:37:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 15:37:42,353 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:42,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:42,362 INFO L225 Difference]: With dead ends: 7371 [2021-06-12 15:37:42,362 INFO L226 Difference]: Without dead ends: 7101 [2021-06-12 15:37:42,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2299 ImplicationChecksByTransitivity, 1427.0ms TimeCoverageRelationStatistics Valid=2326, Invalid=6604, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:37:42,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-06-12 15:37:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5978. [2021-06-12 15:37:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:42,433 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:42,433 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:42,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:42,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:42,439 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:42,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:42,639 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:42,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1065639268, now seen corresponding path program 455 times [2021-06-12 15:37:42,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:42,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300197194] [2021-06-12 15:37:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:42,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:42,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300197194] [2021-06-12 15:37:42,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300197194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:42,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591056829] [2021-06-12 15:37:42,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:43,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:37:43,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:43,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:43,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:43,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591056829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:43,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:43,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:43,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431250690] [2021-06-12 15:37:43,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:43,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:43,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:43,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:43,251 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:44,471 INFO L93 Difference]: Finished difference Result 7321 states and 19697 transitions. [2021-06-12 15:37:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:37:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:44,479 INFO L225 Difference]: With dead ends: 7321 [2021-06-12 15:37:44,479 INFO L226 Difference]: Without dead ends: 7051 [2021-06-12 15:37:44,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 1229.5ms TimeCoverageRelationStatistics Valid=2319, Invalid=6237, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:37:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-06-12 15:37:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5978. [2021-06-12 15:37:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:44,564 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:44,565 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:44,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:44,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:44,570 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:44,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:44,771 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:44,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash 997488212, now seen corresponding path program 456 times [2021-06-12 15:37:44,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:44,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741018470] [2021-06-12 15:37:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:45,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:45,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741018470] [2021-06-12 15:37:45,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741018470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:45,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965089614] [2021-06-12 15:37:45,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:45,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:37:45,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:45,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 15:37:45,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:45,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965089614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:45,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:45,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:45,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092193350] [2021-06-12 15:37:45,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:45,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:45,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:45,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:45,392 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:46,827 INFO L93 Difference]: Finished difference Result 7271 states and 19597 transitions. [2021-06-12 15:37:46,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 15:37:46,828 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:46,835 INFO L225 Difference]: With dead ends: 7271 [2021-06-12 15:37:46,835 INFO L226 Difference]: Without dead ends: 7001 [2021-06-12 15:37:46,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 1412.0ms TimeCoverageRelationStatistics Valid=2158, Invalid=6772, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:37:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-12 15:37:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5978. [2021-06-12 15:37:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:46,900 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:46,900 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:46,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:46,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:46,905 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:47,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:47,106 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:47,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:47,106 INFO L82 PathProgramCache]: Analyzing trace with hash -299480862, now seen corresponding path program 457 times [2021-06-12 15:37:47,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:47,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280259835] [2021-06-12 15:37:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:47,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:47,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280259835] [2021-06-12 15:37:47,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280259835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:47,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152484936] [2021-06-12 15:37:47,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:47,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:47,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:47,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152484936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:47,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:47,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:47,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710568207] [2021-06-12 15:37:47,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:47,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:47,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:47,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:47,696 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:49,054 INFO L93 Difference]: Finished difference Result 7221 states and 19497 transitions. [2021-06-12 15:37:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 15:37:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:49,061 INFO L225 Difference]: With dead ends: 7221 [2021-06-12 15:37:49,061 INFO L226 Difference]: Without dead ends: 6951 [2021-06-12 15:37:49,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 1307.5ms TimeCoverageRelationStatistics Valid=2505, Invalid=6425, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:37:49,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-12 15:37:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5978. [2021-06-12 15:37:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:49,127 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:49,127 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:49,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:49,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:49,132 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:49,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-12 15:37:49,332 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash 130272722, now seen corresponding path program 458 times [2021-06-12 15:37:49,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:49,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528908949] [2021-06-12 15:37:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:49,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:49,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528908949] [2021-06-12 15:37:49,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528908949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:49,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491249813] [2021-06-12 15:37:49,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:49,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:37:49,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:49,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:49,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:49,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491249813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:49,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:49,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:49,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377168135] [2021-06-12 15:37:49,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:49,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:49,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:49,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:49,957 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:51,687 INFO L93 Difference]: Finished difference Result 7679 states and 20763 transitions. [2021-06-12 15:37:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 15:37:51,688 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:51,695 INFO L225 Difference]: With dead ends: 7679 [2021-06-12 15:37:51,696 INFO L226 Difference]: Without dead ends: 7056 [2021-06-12 15:37:51,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 1616.6ms TimeCoverageRelationStatistics Valid=2721, Invalid=7379, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 15:37:51,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7056 states. [2021-06-12 15:37:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7056 to 5888. [2021-06-12 15:37:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5888 states, 5887 states have (on average 2.8279259385085784) internal successors, (16648), 5887 states have internal predecessors, (16648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5888 states to 5888 states and 16648 transitions. [2021-06-12 15:37:51,779 INFO L78 Accepts]: Start accepts. Automaton has 5888 states and 16648 transitions. Word has length 180 [2021-06-12 15:37:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:51,779 INFO L482 AbstractCegarLoop]: Abstraction has 5888 states and 16648 transitions. [2021-06-12 15:37:51,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5888 states and 16648 transitions. [2021-06-12 15:37:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:51,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:51,785 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:52,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-12 15:37:52,001 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash 72538592, now seen corresponding path program 459 times [2021-06-12 15:37:52,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:52,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188305664] [2021-06-12 15:37:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:52,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:52,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188305664] [2021-06-12 15:37:52,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188305664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:52,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427407798] [2021-06-12 15:37:52,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:52,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:37:52,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:52,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:37:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:52,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427407798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:52,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:52,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:52,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172765742] [2021-06-12 15:37:52,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:52,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:52,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:52,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:52,631 INFO L87 Difference]: Start difference. First operand 5888 states and 16648 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:54,067 INFO L93 Difference]: Finished difference Result 7908 states and 21481 transitions. [2021-06-12 15:37:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 15:37:54,067 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:54,075 INFO L225 Difference]: With dead ends: 7908 [2021-06-12 15:37:54,075 INFO L226 Difference]: Without dead ends: 7638 [2021-06-12 15:37:54,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 1345.3ms TimeCoverageRelationStatistics Valid=2708, Invalid=6604, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 15:37:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7638 states. [2021-06-12 15:37:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7638 to 6068. [2021-06-12 15:37:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6068 states, 6067 states have (on average 2.836162848195154) internal successors, (17207), 6067 states have internal predecessors, (17207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6068 states to 6068 states and 17207 transitions. [2021-06-12 15:37:54,167 INFO L78 Accepts]: Start accepts. Automaton has 6068 states and 17207 transitions. Word has length 180 [2021-06-12 15:37:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:54,168 INFO L482 AbstractCegarLoop]: Abstraction has 6068 states and 17207 transitions. [2021-06-12 15:37:54,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 6068 states and 17207 transitions. [2021-06-12 15:37:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:54,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:54,172 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:54,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:54,373 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:54,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:54,373 INFO L82 PathProgramCache]: Analyzing trace with hash 94881842, now seen corresponding path program 460 times [2021-06-12 15:37:54,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:54,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272084850] [2021-06-12 15:37:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:54,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:54,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272084850] [2021-06-12 15:37:54,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272084850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:54,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226708217] [2021-06-12 15:37:54,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:54,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:37:54,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:54,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:54,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:54,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226708217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:54,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:54,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:37:54,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23967496] [2021-06-12 15:37:54,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:54,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:54,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:54,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:54,986 INFO L87 Difference]: Start difference. First operand 6068 states and 17207 transitions. Second operand has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:56,766 INFO L93 Difference]: Finished difference Result 7851 states and 21341 transitions. [2021-06-12 15:37:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 15:37:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-12 15:37:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:56,773 INFO L225 Difference]: With dead ends: 7851 [2021-06-12 15:37:56,773 INFO L226 Difference]: Without dead ends: 7276 [2021-06-12 15:37:56,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1649.0ms TimeCoverageRelationStatistics Valid=2964, Invalid=7748, Unknown=0, NotChecked=0, Total=10712 [2021-06-12 15:37:56,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-12 15:37:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 6103. [2021-06-12 15:37:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:37:56,841 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 180 [2021-06-12 15:37:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:56,841 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:37:56,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:37:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:37:56,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:56,846 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:57,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-12 15:37:57,047 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash -730740019, now seen corresponding path program 461 times [2021-06-12 15:37:57,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:57,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402433251] [2021-06-12 15:37:57,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:57,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:57,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402433251] [2021-06-12 15:37:57,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402433251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:57,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893497637] [2021-06-12 15:37:57,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:57,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:37:57,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:57,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:37:57,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:57,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893497637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:57,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:57,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:37:57,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822292358] [2021-06-12 15:37:57,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:57,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:57,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:57,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:57,749 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:58,570 INFO L93 Difference]: Finished difference Result 7946 states and 21097 transitions. [2021-06-12 15:37:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:37:58,570 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:37:58,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:58,578 INFO L225 Difference]: With dead ends: 7946 [2021-06-12 15:37:58,578 INFO L226 Difference]: Without dead ends: 7676 [2021-06-12 15:37:58,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 913.3ms TimeCoverageRelationStatistics Valid=1382, Invalid=3730, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:37:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-12 15:37:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6103. [2021-06-12 15:37:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:37:58,651 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:37:58,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:58,651 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:37:58,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:37:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:37:58,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:58,657 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:37:58,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-12 15:37:58,857 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:58,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:58,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2000868285, now seen corresponding path program 462 times [2021-06-12 15:37:58,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:58,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893581352] [2021-06-12 15:37:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:59,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:59,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893581352] [2021-06-12 15:37:59,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893581352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:59,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803014920] [2021-06-12 15:37:59,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:59,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:37:59,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:59,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:37:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:37:59,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803014920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:59,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:59,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:37:59,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820828820] [2021-06-12 15:37:59,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:37:59,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:59,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:37:59,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:37:59,621 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:00,496 INFO L93 Difference]: Finished difference Result 8641 states and 22487 transitions. [2021-06-12 15:38:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:38:00,497 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:00,505 INFO L225 Difference]: With dead ends: 8641 [2021-06-12 15:38:00,506 INFO L226 Difference]: Without dead ends: 8371 [2021-06-12 15:38:00,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1002.3ms TimeCoverageRelationStatistics Valid=1453, Invalid=4097, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:38:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8371 states. [2021-06-12 15:38:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8371 to 6103. [2021-06-12 15:38:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:00,584 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:00,584 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:00,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:00,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:00,589 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:00,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:00,790 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash -601344949, now seen corresponding path program 463 times [2021-06-12 15:38:00,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:00,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658188814] [2021-06-12 15:38:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:01,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658188814] [2021-06-12 15:38:01,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658188814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982886850] [2021-06-12 15:38:01,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:01,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:01,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:01,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982886850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:01,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:01,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:01,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872840555] [2021-06-12 15:38:01,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:01,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:01,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:01,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:01,457 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:02,320 INFO L93 Difference]: Finished difference Result 8596 states and 22397 transitions. [2021-06-12 15:38:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:38:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:02,329 INFO L225 Difference]: With dead ends: 8596 [2021-06-12 15:38:02,330 INFO L226 Difference]: Without dead ends: 8326 [2021-06-12 15:38:02,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 936.5ms TimeCoverageRelationStatistics Valid=1441, Invalid=4109, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:38:02,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8326 states. [2021-06-12 15:38:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 6103. [2021-06-12 15:38:02,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:02,408 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:02,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:02,408 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:02,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:02,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:02,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:02,414 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:02,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:02,614 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:02,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1542280901, now seen corresponding path program 464 times [2021-06-12 15:38:02,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:02,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332222234] [2021-06-12 15:38:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:03,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:03,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332222234] [2021-06-12 15:38:03,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332222234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:03,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304576253] [2021-06-12 15:38:03,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:03,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:38:03,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:03,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:03,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:03,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304576253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:03,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:03,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:03,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796720299] [2021-06-12 15:38:03,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:03,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:03,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:03,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:03,316 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:04,182 INFO L93 Difference]: Finished difference Result 8546 states and 22297 transitions. [2021-06-12 15:38:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:38:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:04,191 INFO L225 Difference]: With dead ends: 8546 [2021-06-12 15:38:04,191 INFO L226 Difference]: Without dead ends: 8276 [2021-06-12 15:38:04,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1028.2ms TimeCoverageRelationStatistics Valid=1463, Invalid=4389, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:38:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-12 15:38:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6103. [2021-06-12 15:38:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:04,266 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:04,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:04,266 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:04,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:04,266 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:04,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:04,271 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:04,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:04,471 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash 89047881, now seen corresponding path program 465 times [2021-06-12 15:38:04,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:04,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940725715] [2021-06-12 15:38:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:04,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:04,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940725715] [2021-06-12 15:38:04,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940725715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:04,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432036522] [2021-06-12 15:38:04,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:04,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:38:04,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:04,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-12 15:38:04,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:05,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432036522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:05,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:05,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:05,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933533849] [2021-06-12 15:38:05,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:05,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:05,140 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:05,996 INFO L93 Difference]: Finished difference Result 8496 states and 22197 transitions. [2021-06-12 15:38:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:38:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:06,005 INFO L225 Difference]: With dead ends: 8496 [2021-06-12 15:38:06,005 INFO L226 Difference]: Without dead ends: 8226 [2021-06-12 15:38:06,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 959.4ms TimeCoverageRelationStatistics Valid=1465, Invalid=4387, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:38:06,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-06-12 15:38:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 6103. [2021-06-12 15:38:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:06,086 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:06,086 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:06,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:06,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:06,092 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:06,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:06,292 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash -756440007, now seen corresponding path program 466 times [2021-06-12 15:38:06,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:06,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681357086] [2021-06-12 15:38:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:06,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:06,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681357086] [2021-06-12 15:38:06,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681357086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:06,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125230416] [2021-06-12 15:38:06,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:06,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:38:06,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:06,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:06,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:06,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125230416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:06,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:06,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:06,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792806931] [2021-06-12 15:38:06,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:06,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:06,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:06,988 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:07,956 INFO L93 Difference]: Finished difference Result 8446 states and 22097 transitions. [2021-06-12 15:38:07,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:38:07,956 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:07,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:07,965 INFO L225 Difference]: With dead ends: 8446 [2021-06-12 15:38:07,965 INFO L226 Difference]: Without dead ends: 8176 [2021-06-12 15:38:07,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1070.9ms TimeCoverageRelationStatistics Valid=1489, Invalid=4673, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:38:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-12 15:38:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6103. [2021-06-12 15:38:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:08,040 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:08,041 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:08,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:08,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:08,046 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:08,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-12 15:38:08,246 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:08,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1632524231, now seen corresponding path program 467 times [2021-06-12 15:38:08,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:08,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550102560] [2021-06-12 15:38:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:08,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:08,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550102560] [2021-06-12 15:38:08,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550102560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:08,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82308758] [2021-06-12 15:38:08,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:08,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:38:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:08,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:08,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82308758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:08,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:08,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:08,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415994643] [2021-06-12 15:38:08,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:08,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:08,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:08,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:08,896 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:09,762 INFO L93 Difference]: Finished difference Result 8396 states and 21997 transitions. [2021-06-12 15:38:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:38:09,762 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:09,771 INFO L225 Difference]: With dead ends: 8396 [2021-06-12 15:38:09,771 INFO L226 Difference]: Without dead ends: 8126 [2021-06-12 15:38:09,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 993.0ms TimeCoverageRelationStatistics Valid=1505, Invalid=4657, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:38:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-12 15:38:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6103. [2021-06-12 15:38:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:09,849 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:09,849 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:09,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:09,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:09,854 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:10,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-12 15:38:10,055 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1779391305, now seen corresponding path program 468 times [2021-06-12 15:38:10,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:10,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38535913] [2021-06-12 15:38:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:10,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:10,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38535913] [2021-06-12 15:38:10,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38535913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:10,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23574100] [2021-06-12 15:38:10,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:10,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:38:10,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:10,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:10,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:10,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23574100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:10,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:10,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:10,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871284353] [2021-06-12 15:38:10,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:10,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:10,744 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:11,761 INFO L93 Difference]: Finished difference Result 8346 states and 21897 transitions. [2021-06-12 15:38:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:38:11,762 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:11,770 INFO L225 Difference]: With dead ends: 8346 [2021-06-12 15:38:11,771 INFO L226 Difference]: Without dead ends: 8076 [2021-06-12 15:38:11,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1099.8ms TimeCoverageRelationStatistics Valid=1531, Invalid=4949, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:38:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-12 15:38:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 6103. [2021-06-12 15:38:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:11,847 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:11,847 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:11,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:11,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:11,852 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:12,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-12 15:38:12,052 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:12,053 INFO L82 PathProgramCache]: Analyzing trace with hash 623366597, now seen corresponding path program 469 times [2021-06-12 15:38:12,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:12,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977752414] [2021-06-12 15:38:12,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:12,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:12,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977752414] [2021-06-12 15:38:12,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977752414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:12,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090321315] [2021-06-12 15:38:12,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:12,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090321315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:12,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:12,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:12,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517237861] [2021-06-12 15:38:12,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:12,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:12,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:12,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:12,711 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:13,603 INFO L93 Difference]: Finished difference Result 8296 states and 21797 transitions. [2021-06-12 15:38:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:38:13,604 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:13,612 INFO L225 Difference]: With dead ends: 8296 [2021-06-12 15:38:13,612 INFO L226 Difference]: Without dead ends: 8026 [2021-06-12 15:38:13,613 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 985.8ms TimeCoverageRelationStatistics Valid=1561, Invalid=4919, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:38:13,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-06-12 15:38:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 6103. [2021-06-12 15:38:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:13,687 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:13,688 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:13,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:13,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:13,693 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:13,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-12 15:38:13,893 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:13,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1830253899, now seen corresponding path program 470 times [2021-06-12 15:38:13,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:13,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425826975] [2021-06-12 15:38:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:14,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:14,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425826975] [2021-06-12 15:38:14,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425826975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:14,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12878453] [2021-06-12 15:38:14,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:14,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:38:14,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:14,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:14,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12878453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:14,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:14,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:14,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696426906] [2021-06-12 15:38:14,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:14,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:14,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:14,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:14,583 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:15,632 INFO L93 Difference]: Finished difference Result 8246 states and 21697 transitions. [2021-06-12 15:38:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:38:15,632 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:15,641 INFO L225 Difference]: With dead ends: 8246 [2021-06-12 15:38:15,641 INFO L226 Difference]: Without dead ends: 7976 [2021-06-12 15:38:15,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1133.2ms TimeCoverageRelationStatistics Valid=1589, Invalid=5217, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:38:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2021-06-12 15:38:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 6103. [2021-06-12 15:38:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:15,719 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:15,719 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:15,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:15,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:15,725 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:15,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-12 15:38:15,925 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash -948694717, now seen corresponding path program 471 times [2021-06-12 15:38:15,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:15,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040094891] [2021-06-12 15:38:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:16,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:16,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040094891] [2021-06-12 15:38:16,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040094891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:16,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463334983] [2021-06-12 15:38:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:16,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:38:16,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-12 15:38:16,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:16,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463334983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:16,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:16,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:16,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907259417] [2021-06-12 15:38:16,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:16,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:16,609 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:17,551 INFO L93 Difference]: Finished difference Result 8196 states and 21597 transitions. [2021-06-12 15:38:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:38:17,551 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:17,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:17,560 INFO L225 Difference]: With dead ends: 8196 [2021-06-12 15:38:17,560 INFO L226 Difference]: Without dead ends: 7926 [2021-06-12 15:38:17,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1018.8ms TimeCoverageRelationStatistics Valid=1633, Invalid=5173, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:38:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-06-12 15:38:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 6103. [2021-06-12 15:38:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:17,638 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:17,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:17,638 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:17,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:17,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:17,644 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:17,644 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:17,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:17,844 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1591069133, now seen corresponding path program 472 times [2021-06-12 15:38:17,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:17,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960921769] [2021-06-12 15:38:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:18,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:18,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960921769] [2021-06-12 15:38:18,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960921769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:18,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699878806] [2021-06-12 15:38:18,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:18,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:38:18,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:18,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:18,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:18,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699878806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:18,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:18,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:18,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062888205] [2021-06-12 15:38:18,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:18,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:18,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:18,520 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:19,600 INFO L93 Difference]: Finished difference Result 8146 states and 21497 transitions. [2021-06-12 15:38:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:38:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:19,609 INFO L225 Difference]: With dead ends: 8146 [2021-06-12 15:38:19,609 INFO L226 Difference]: Without dead ends: 7876 [2021-06-12 15:38:19,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1150.3ms TimeCoverageRelationStatistics Valid=1663, Invalid=5477, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:38:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2021-06-12 15:38:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6103. [2021-06-12 15:38:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:19,681 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:19,681 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:19,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:19,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:19,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:19,686 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:19,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:19,887 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:19,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1637616063, now seen corresponding path program 473 times [2021-06-12 15:38:19,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:19,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736530263] [2021-06-12 15:38:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:20,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:20,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736530263] [2021-06-12 15:38:20,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736530263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:20,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189340094] [2021-06-12 15:38:20,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:20,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:38:20,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:20,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:20,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189340094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:20,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:20,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:20,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182444751] [2021-06-12 15:38:20,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:20,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:20,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:20,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:20,532 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:21,512 INFO L93 Difference]: Finished difference Result 8096 states and 21397 transitions. [2021-06-12 15:38:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:38:21,513 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:21,521 INFO L225 Difference]: With dead ends: 8096 [2021-06-12 15:38:21,521 INFO L226 Difference]: Without dead ends: 7826 [2021-06-12 15:38:21,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 1069.4ms TimeCoverageRelationStatistics Valid=1721, Invalid=5419, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:38:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-06-12 15:38:21,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 6103. [2021-06-12 15:38:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:21,594 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:21,595 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:21,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:21,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:21,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:21,600 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:21,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:21,800 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:21,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1738966833, now seen corresponding path program 474 times [2021-06-12 15:38:21,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:21,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75658168] [2021-06-12 15:38:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:22,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:22,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75658168] [2021-06-12 15:38:22,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75658168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:22,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427788456] [2021-06-12 15:38:22,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:22,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:38:22,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:22,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:22,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:22,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427788456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:22,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:22,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:22,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214557446] [2021-06-12 15:38:22,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:22,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:22,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:22,534 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:23,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:23,677 INFO L93 Difference]: Finished difference Result 8046 states and 21297 transitions. [2021-06-12 15:38:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:38:23,677 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:23,685 INFO L225 Difference]: With dead ends: 8046 [2021-06-12 15:38:23,685 INFO L226 Difference]: Without dead ends: 7776 [2021-06-12 15:38:23,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1242.2ms TimeCoverageRelationStatistics Valid=1753, Invalid=5729, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:38:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-06-12 15:38:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 6103. [2021-06-12 15:38:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:23,767 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:23,767 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:23,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:23,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:23,772 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:23,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:23,973 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash -37723969, now seen corresponding path program 475 times [2021-06-12 15:38:23,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:23,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972658567] [2021-06-12 15:38:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:24,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:24,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972658567] [2021-06-12 15:38:24,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972658567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:24,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934695344] [2021-06-12 15:38:24,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:24,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:24,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:24,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934695344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:24,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:24,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:24,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551303368] [2021-06-12 15:38:24,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:24,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:24,577 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:25,652 INFO L93 Difference]: Finished difference Result 7996 states and 21197 transitions. [2021-06-12 15:38:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:38:25,652 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:25,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:25,658 INFO L225 Difference]: With dead ends: 7996 [2021-06-12 15:38:25,659 INFO L226 Difference]: Without dead ends: 7726 [2021-06-12 15:38:25,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 1111.6ms TimeCoverageRelationStatistics Valid=1825, Invalid=5657, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:38:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-12 15:38:25,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 6103. [2021-06-12 15:38:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:25,724 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:25,724 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:25,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:25,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:25,729 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:25,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:25,929 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2061917615, now seen corresponding path program 476 times [2021-06-12 15:38:25,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:25,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924457543] [2021-06-12 15:38:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:26,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:26,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924457543] [2021-06-12 15:38:26,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924457543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:26,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134643953] [2021-06-12 15:38:26,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:26,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:38:26,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:26,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:26,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:26,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134643953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:26,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:26,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:26,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15343851] [2021-06-12 15:38:26,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:26,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:26,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:26,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:26,565 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:27,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:27,775 INFO L93 Difference]: Finished difference Result 7946 states and 21097 transitions. [2021-06-12 15:38:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:38:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:27,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:27,783 INFO L225 Difference]: With dead ends: 7946 [2021-06-12 15:38:27,783 INFO L226 Difference]: Without dead ends: 7676 [2021-06-12 15:38:27,784 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1265.1ms TimeCoverageRelationStatistics Valid=1859, Invalid=5973, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:38:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-12 15:38:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6103. [2021-06-12 15:38:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:27,856 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:27,856 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:27,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:27,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:27,862 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:28,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:28,062 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:28,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:28,062 INFO L82 PathProgramCache]: Analyzing trace with hash -722849603, now seen corresponding path program 477 times [2021-06-12 15:38:28,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:28,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476814474] [2021-06-12 15:38:28,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:28,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:28,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476814474] [2021-06-12 15:38:28,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476814474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:28,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106256605] [2021-06-12 15:38:28,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:28,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:38:28,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:28,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-12 15:38:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:28,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106256605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:28,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:28,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:28,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700947244] [2021-06-12 15:38:28,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:28,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:28,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:28,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:28,683 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:29,773 INFO L93 Difference]: Finished difference Result 7896 states and 20997 transitions. [2021-06-12 15:38:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:38:29,773 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:29,781 INFO L225 Difference]: With dead ends: 7896 [2021-06-12 15:38:29,781 INFO L226 Difference]: Without dead ends: 7626 [2021-06-12 15:38:29,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1129.1ms TimeCoverageRelationStatistics Valid=1945, Invalid=5887, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:38:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-12 15:38:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6103. [2021-06-12 15:38:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:29,855 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:29,856 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:29,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:29,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:29,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:29,861 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:30,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:30,062 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:30,062 INFO L82 PathProgramCache]: Analyzing trace with hash -83191379, now seen corresponding path program 478 times [2021-06-12 15:38:30,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:30,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982346424] [2021-06-12 15:38:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:30,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:30,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982346424] [2021-06-12 15:38:30,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982346424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:30,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634255361] [2021-06-12 15:38:30,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:30,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:38:30,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:30,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:30,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:30,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634255361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:30,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:30,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:30,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399051791] [2021-06-12 15:38:30,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:30,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:30,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:30,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:30,697 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:31,980 INFO L93 Difference]: Finished difference Result 7846 states and 20897 transitions. [2021-06-12 15:38:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:38:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:31,989 INFO L225 Difference]: With dead ends: 7846 [2021-06-12 15:38:31,989 INFO L226 Difference]: Without dead ends: 7576 [2021-06-12 15:38:31,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1324.0ms TimeCoverageRelationStatistics Valid=1981, Invalid=6209, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:38:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2021-06-12 15:38:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 6103. [2021-06-12 15:38:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:32,065 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:32,065 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:32,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:32,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:32,070 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:32,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-12 15:38:32,271 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:32,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:32,271 INFO L82 PathProgramCache]: Analyzing trace with hash -858110405, now seen corresponding path program 479 times [2021-06-12 15:38:32,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:32,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999081651] [2021-06-12 15:38:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:32,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:32,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999081651] [2021-06-12 15:38:32,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999081651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:32,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332944624] [2021-06-12 15:38:32,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:32,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:38:32,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:32,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:32,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:32,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332944624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:32,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:32,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:32,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761592388] [2021-06-12 15:38:32,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:32,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:32,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:32,887 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:34,023 INFO L93 Difference]: Finished difference Result 7796 states and 20797 transitions. [2021-06-12 15:38:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:38:34,024 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:34,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:34,032 INFO L225 Difference]: With dead ends: 7796 [2021-06-12 15:38:34,032 INFO L226 Difference]: Without dead ends: 7526 [2021-06-12 15:38:34,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 1147.5ms TimeCoverageRelationStatistics Valid=2081, Invalid=6109, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:38:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-06-12 15:38:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 6103. [2021-06-12 15:38:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:34,104 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:34,104 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:34,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:34,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:34,109 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:34,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:34,309 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1312023765, now seen corresponding path program 480 times [2021-06-12 15:38:34,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:34,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136563199] [2021-06-12 15:38:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:34,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:34,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136563199] [2021-06-12 15:38:34,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136563199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:34,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611666587] [2021-06-12 15:38:34,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:34,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:38:34,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:34,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 15:38:34,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:34,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611666587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:34,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:34,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:34,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491052344] [2021-06-12 15:38:34,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:34,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:34,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:34,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:34,968 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:36,286 INFO L93 Difference]: Finished difference Result 7746 states and 20697 transitions. [2021-06-12 15:38:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:38:36,286 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:36,294 INFO L225 Difference]: With dead ends: 7746 [2021-06-12 15:38:36,295 INFO L226 Difference]: Without dead ends: 7476 [2021-06-12 15:38:36,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 1316.7ms TimeCoverageRelationStatistics Valid=1981, Invalid=6575, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:38:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-06-12 15:38:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 6103. [2021-06-12 15:38:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:36,370 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:36,370 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:36,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:36,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:36,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:36,375 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:36,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-12 15:38:36,576 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:36,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:36,576 INFO L82 PathProgramCache]: Analyzing trace with hash -434011847, now seen corresponding path program 481 times [2021-06-12 15:38:36,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:36,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544543125] [2021-06-12 15:38:36,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:36,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:36,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544543125] [2021-06-12 15:38:36,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544543125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:36,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351471355] [2021-06-12 15:38:36,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:37,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351471355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:37,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:37,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:37,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996791319] [2021-06-12 15:38:37,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:37,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:37,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:37,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:37,214 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:38,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:38,402 INFO L93 Difference]: Finished difference Result 7696 states and 20597 transitions. [2021-06-12 15:38:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:38:38,402 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:38,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:38,410 INFO L225 Difference]: With dead ends: 7696 [2021-06-12 15:38:38,411 INFO L226 Difference]: Without dead ends: 7426 [2021-06-12 15:38:38,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 1221.4ms TimeCoverageRelationStatistics Valid=2233, Invalid=6323, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:38:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-06-12 15:38:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6103. [2021-06-12 15:38:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:38,483 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:38,483 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:38,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:38,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:38,488 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:38,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:38,689 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1334066647, now seen corresponding path program 482 times [2021-06-12 15:38:38,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:38,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163594377] [2021-06-12 15:38:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:39,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:39,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163594377] [2021-06-12 15:38:39,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163594377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:39,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599471951] [2021-06-12 15:38:39,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:39,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:38:39,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:39,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:39,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599471951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:39,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:39,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:39,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395715083] [2021-06-12 15:38:39,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:39,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:39,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:39,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:39,338 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:40,774 INFO L93 Difference]: Finished difference Result 7646 states and 20497 transitions. [2021-06-12 15:38:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 15:38:40,775 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:40,781 INFO L225 Difference]: With dead ends: 7646 [2021-06-12 15:38:40,781 INFO L226 Difference]: Without dead ends: 7376 [2021-06-12 15:38:40,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 1424.4ms TimeCoverageRelationStatistics Valid=2273, Invalid=6657, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:38:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2021-06-12 15:38:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 6103. [2021-06-12 15:38:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:40,849 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:40,849 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:40,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:40,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:40,854 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:41,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-12 15:38:41,055 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:41,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1763130953, now seen corresponding path program 483 times [2021-06-12 15:38:41,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:41,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498403407] [2021-06-12 15:38:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:41,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:41,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498403407] [2021-06-12 15:38:41,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498403407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340946002] [2021-06-12 15:38:41,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:41,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:38:41,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:41,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 15:38:41,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:41,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340946002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:41,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:41,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:41,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134631067] [2021-06-12 15:38:41,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:41,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:41,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:41,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:41,673 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:42,930 INFO L93 Difference]: Finished difference Result 7596 states and 20397 transitions. [2021-06-12 15:38:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 15:38:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:42,937 INFO L225 Difference]: With dead ends: 7596 [2021-06-12 15:38:42,937 INFO L226 Difference]: Without dead ends: 7326 [2021-06-12 15:38:42,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 1230.7ms TimeCoverageRelationStatistics Valid=2401, Invalid=6529, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:38:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2021-06-12 15:38:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 6103. [2021-06-12 15:38:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:43,007 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:43,007 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:43,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:43,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:43,012 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:43,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:43,213 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1845653159, now seen corresponding path program 484 times [2021-06-12 15:38:43,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:43,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990405033] [2021-06-12 15:38:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:43,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:43,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990405033] [2021-06-12 15:38:43,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990405033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:43,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064358647] [2021-06-12 15:38:43,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:43,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:38:43,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:43,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:43,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064358647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:43,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:43,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:43,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205146275] [2021-06-12 15:38:43,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:43,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:43,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:43,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:43,840 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:45,321 INFO L93 Difference]: Finished difference Result 7546 states and 20297 transitions. [2021-06-12 15:38:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 15:38:45,322 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:45,329 INFO L225 Difference]: With dead ends: 7546 [2021-06-12 15:38:45,329 INFO L226 Difference]: Without dead ends: 7276 [2021-06-12 15:38:45,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 1458.9ms TimeCoverageRelationStatistics Valid=2443, Invalid=6869, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 15:38:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-12 15:38:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 6103. [2021-06-12 15:38:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:45,401 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:45,401 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:45,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:45,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:45,406 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:45,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:45,606 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:45,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:45,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1760618421, now seen corresponding path program 485 times [2021-06-12 15:38:45,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:45,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844931606] [2021-06-12 15:38:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:45,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:45,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844931606] [2021-06-12 15:38:45,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844931606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:45,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555284241] [2021-06-12 15:38:45,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:46,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:38:46,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:46,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:46,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555284241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:46,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:46,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:46,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152560075] [2021-06-12 15:38:46,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:46,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:46,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:46,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:46,230 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:47,513 INFO L93 Difference]: Finished difference Result 7496 states and 20197 transitions. [2021-06-12 15:38:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 15:38:47,513 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:47,521 INFO L225 Difference]: With dead ends: 7496 [2021-06-12 15:38:47,521 INFO L226 Difference]: Without dead ends: 7226 [2021-06-12 15:38:47,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 1253.3ms TimeCoverageRelationStatistics Valid=2585, Invalid=6727, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 15:38:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-06-12 15:38:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 6103. [2021-06-12 15:38:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:47,596 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:47,597 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:47,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:47,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:47,602 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:47,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:47,802 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:47,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:47,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1692467365, now seen corresponding path program 486 times [2021-06-12 15:38:47,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:47,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421070270] [2021-06-12 15:38:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:48,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:48,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421070270] [2021-06-12 15:38:48,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421070270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:48,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154795298] [2021-06-12 15:38:48,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:48,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:38:48,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 15:38:48,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:48,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154795298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:48,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:48,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:48,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591743172] [2021-06-12 15:38:48,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:48,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:48,450 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:49,963 INFO L93 Difference]: Finished difference Result 7446 states and 20097 transitions. [2021-06-12 15:38:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 15:38:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:49,971 INFO L225 Difference]: With dead ends: 7446 [2021-06-12 15:38:49,971 INFO L226 Difference]: Without dead ends: 7176 [2021-06-12 15:38:49,972 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 1447.8ms TimeCoverageRelationStatistics Valid=2392, Invalid=7310, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 15:38:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-06-12 15:38:50,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 6103. [2021-06-12 15:38:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:50,052 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:50,052 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:50,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:50,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:50,057 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:50,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-06-12 15:38:50,258 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:50,258 INFO L82 PathProgramCache]: Analyzing trace with hash 395498291, now seen corresponding path program 487 times [2021-06-12 15:38:50,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:50,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876757054] [2021-06-12 15:38:50,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:50,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:50,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876757054] [2021-06-12 15:38:50,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876757054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:50,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068137148] [2021-06-12 15:38:50,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:50,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:50,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068137148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:50,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:50,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:50,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655106499] [2021-06-12 15:38:50,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:50,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:50,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:50,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:50,855 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:52,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:52,199 INFO L93 Difference]: Finished difference Result 7396 states and 19997 transitions. [2021-06-12 15:38:52,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 15:38:52,199 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:52,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:52,205 INFO L225 Difference]: With dead ends: 7396 [2021-06-12 15:38:52,205 INFO L226 Difference]: Without dead ends: 7126 [2021-06-12 15:38:52,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 1317.7ms TimeCoverageRelationStatistics Valid=2785, Invalid=6917, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 15:38:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-06-12 15:38:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 6103. [2021-06-12 15:38:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-12 15:38:52,272 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-12 15:38:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:52,272 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-12 15:38:52,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-12 15:38:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:52,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:52,278 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:52,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:52,479 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:52,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:52,479 INFO L82 PathProgramCache]: Analyzing trace with hash 825251875, now seen corresponding path program 488 times [2021-06-12 15:38:52,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:52,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546215324] [2021-06-12 15:38:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:52,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:52,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546215324] [2021-06-12 15:38:52,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546215324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:52,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856216129] [2021-06-12 15:38:52,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:52,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:38:52,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:52,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:52,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:53,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856216129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:53,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:53,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:53,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074472444] [2021-06-12 15:38:53,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:53,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:53,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:53,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:53,125 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:54,712 INFO L93 Difference]: Finished difference Result 7406 states and 20047 transitions. [2021-06-12 15:38:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 15:38:54,712 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:54,719 INFO L225 Difference]: With dead ends: 7406 [2021-06-12 15:38:54,719 INFO L226 Difference]: Without dead ends: 7136 [2021-06-12 15:38:54,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 1577.1ms TimeCoverageRelationStatistics Valid=2831, Invalid=7269, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 15:38:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7136 states. [2021-06-12 15:38:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7136 to 6103. [2021-06-12 15:38:54,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.833169452638479) internal successors, (17288), 6102 states have internal predecessors, (17288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17288 transitions. [2021-06-12 15:38:54,794 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17288 transitions. Word has length 185 [2021-06-12 15:38:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:54,794 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17288 transitions. [2021-06-12 15:38:54,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17288 transitions. [2021-06-12 15:38:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:54,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:54,799 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:54,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-12 15:38:55,000 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:55,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:55,000 INFO L82 PathProgramCache]: Analyzing trace with hash 767517745, now seen corresponding path program 489 times [2021-06-12 15:38:55,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:55,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356193623] [2021-06-12 15:38:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:55,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:55,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356193623] [2021-06-12 15:38:55,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356193623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:55,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665479690] [2021-06-12 15:38:55,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:55,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:38:55,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:55,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:38:55,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:55,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665479690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:55,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:55,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:55,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463119065] [2021-06-12 15:38:55,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:55,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:55,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:55,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:55,625 INFO L87 Difference]: Start difference. First operand 6103 states and 17288 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:57,001 INFO L93 Difference]: Finished difference Result 8148 states and 22171 transitions. [2021-06-12 15:38:57,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 15:38:57,001 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:57,010 INFO L225 Difference]: With dead ends: 8148 [2021-06-12 15:38:57,010 INFO L226 Difference]: Without dead ends: 7878 [2021-06-12 15:38:57,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1376.8ms TimeCoverageRelationStatistics Valid=3002, Invalid=7098, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 15:38:57,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-12 15:38:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 6283. [2021-06-12 15:38:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6283 states, 6282 states have (on average 2.840974212034384) internal successors, (17847), 6282 states have internal predecessors, (17847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 17847 transitions. [2021-06-12 15:38:57,087 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 17847 transitions. Word has length 185 [2021-06-12 15:38:57,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:57,087 INFO L482 AbstractCegarLoop]: Abstraction has 6283 states and 17847 transitions. [2021-06-12 15:38:57,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 17847 transitions. [2021-06-12 15:38:57,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:57,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:57,093 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:57,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-12 15:38:57,293 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:57,293 INFO L82 PathProgramCache]: Analyzing trace with hash 789860995, now seen corresponding path program 490 times [2021-06-12 15:38:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:57,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291721307] [2021-06-12 15:38:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:57,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:57,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291721307] [2021-06-12 15:38:57,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291721307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:57,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047520046] [2021-06-12 15:38:57,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:57,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:38:57,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:57,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:57,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:38:57,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047520046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:57,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:57,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:57,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670203730] [2021-06-12 15:38:57,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:57,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:57,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:57,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:57,937 INFO L87 Difference]: Start difference. First operand 6283 states and 17847 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:59,557 INFO L93 Difference]: Finished difference Result 7610 states and 20821 transitions. [2021-06-12 15:38:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 15:38:59,557 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-12 15:38:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:59,565 INFO L225 Difference]: With dead ends: 7610 [2021-06-12 15:38:59,565 INFO L226 Difference]: Without dead ends: 7121 [2021-06-12 15:38:59,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 1608.0ms TimeCoverageRelationStatistics Valid=3052, Invalid=7454, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 15:38:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7121 states. [2021-06-12 15:38:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7121 to 6228. [2021-06-12 15:38:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 2.8397302071623574) internal successors, (17683), 6227 states have internal predecessors, (17683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 17683 transitions. [2021-06-12 15:38:59,652 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 17683 transitions. Word has length 185 [2021-06-12 15:38:59,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:59,653 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 17683 transitions. [2021-06-12 15:38:59,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:59,653 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 17683 transitions. [2021-06-12 15:38:59,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:38:59,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:59,658 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:38:59,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-12 15:38:59,859 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:59,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:59,859 INFO L82 PathProgramCache]: Analyzing trace with hash -719599095, now seen corresponding path program 491 times [2021-06-12 15:38:59,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:59,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346260484] [2021-06-12 15:38:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:00,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:00,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346260484] [2021-06-12 15:39:00,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346260484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:00,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319228929] [2021-06-12 15:39:00,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:00,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:39:00,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:00,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:39:00,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:00,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319228929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:00,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:00,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 41 [2021-06-12 15:39:00,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993196037] [2021-06-12 15:39:00,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 15:39:00,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:00,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 15:39:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:39:00,627 INFO L87 Difference]: Start difference. First operand 6228 states and 17683 transitions. Second operand has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:01,508 INFO L93 Difference]: Finished difference Result 7668 states and 20883 transitions. [2021-06-12 15:39:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:39:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:01,516 INFO L225 Difference]: With dead ends: 7668 [2021-06-12 15:39:01,516 INFO L226 Difference]: Without dead ends: 7334 [2021-06-12 15:39:01,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1082.8ms TimeCoverageRelationStatistics Valid=1716, Invalid=4446, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:39:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7334 states. [2021-06-12 15:39:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7334 to 6313. [2021-06-12 15:39:01,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6313 states, 6312 states have (on average 2.828422053231939) internal successors, (17853), 6312 states have internal predecessors, (17853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:01,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 17853 transitions. [2021-06-12 15:39:01,588 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 17853 transitions. Word has length 190 [2021-06-12 15:39:01,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:01,589 INFO L482 AbstractCegarLoop]: Abstraction has 6313 states and 17853 transitions. [2021-06-12 15:39:01,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:01,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 17853 transitions. [2021-06-12 15:39:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:01,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:01,594 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:01,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-12 15:39:01,794 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:01,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1353516717, now seen corresponding path program 492 times [2021-06-12 15:39:01,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:01,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931143297] [2021-06-12 15:39:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:02,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:02,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931143297] [2021-06-12 15:39:02,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931143297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:02,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755963763] [2021-06-12 15:39:02,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:02,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:39:02,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:02,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:02,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:02,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755963763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:02,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:02,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:02,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556950228] [2021-06-12 15:39:02,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:02,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:02,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:02,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:02,556 INFO L87 Difference]: Start difference. First operand 6313 states and 17853 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:03,325 INFO L93 Difference]: Finished difference Result 9061 states and 23477 transitions. [2021-06-12 15:39:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:39:03,325 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:03,333 INFO L225 Difference]: With dead ends: 9061 [2021-06-12 15:39:03,334 INFO L226 Difference]: Without dead ends: 8791 [2021-06-12 15:39:03,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 970.8ms TimeCoverageRelationStatistics Valid=1502, Invalid=3754, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:39:03,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2021-06-12 15:39:03,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 6328. [2021-06-12 15:39:03,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:03,412 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:03,412 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:03,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:03,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:03,418 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:03,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:03,618 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:03,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:03,619 INFO L82 PathProgramCache]: Analyzing trace with hash 507224989, now seen corresponding path program 493 times [2021-06-12 15:39:03,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:03,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548004458] [2021-06-12 15:39:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:04,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:04,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548004458] [2021-06-12 15:39:04,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548004458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:04,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958132817] [2021-06-12 15:39:04,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:04,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:04,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:04,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958132817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:04,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:04,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:04,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465537828] [2021-06-12 15:39:04,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:04,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:04,390 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:05,231 INFO L93 Difference]: Finished difference Result 8946 states and 23247 transitions. [2021-06-12 15:39:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:39:05,231 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:05,238 INFO L225 Difference]: With dead ends: 8946 [2021-06-12 15:39:05,238 INFO L226 Difference]: Without dead ends: 8676 [2021-06-12 15:39:05,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1059.8ms TimeCoverageRelationStatistics Valid=1595, Invalid=4257, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:39:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-06-12 15:39:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6328. [2021-06-12 15:39:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:05,311 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:05,311 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:05,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:05,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:05,317 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:05,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-12 15:39:05,517 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1027331413, now seen corresponding path program 494 times [2021-06-12 15:39:05,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:05,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621984121] [2021-06-12 15:39:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:05,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:05,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621984121] [2021-06-12 15:39:05,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621984121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:05,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559022348] [2021-06-12 15:39:05,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:06,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:39:06,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:06,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:06,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:06,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559022348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:06,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:06,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:06,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075878735] [2021-06-12 15:39:06,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:06,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:06,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:06,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:06,246 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:07,017 INFO L93 Difference]: Finished difference Result 8921 states and 23197 transitions. [2021-06-12 15:39:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:39:07,017 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:07,025 INFO L225 Difference]: With dead ends: 8921 [2021-06-12 15:39:07,025 INFO L226 Difference]: Without dead ends: 8651 [2021-06-12 15:39:07,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 988.1ms TimeCoverageRelationStatistics Valid=1494, Invalid=4056, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:39:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8651 states. [2021-06-12 15:39:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8651 to 6328. [2021-06-12 15:39:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:07,100 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:07,100 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:07,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:07,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:07,105 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:07,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:07,306 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1704276891, now seen corresponding path program 495 times [2021-06-12 15:39:07,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:07,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505125194] [2021-06-12 15:39:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:07,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:07,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505125194] [2021-06-12 15:39:07,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505125194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:07,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689193732] [2021-06-12 15:39:07,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:07,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:39:07,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:07,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:07,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:08,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689193732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:08,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:08,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:08,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300228864] [2021-06-12 15:39:08,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:08,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:08,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:08,118 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:09,014 INFO L93 Difference]: Finished difference Result 8871 states and 23097 transitions. [2021-06-12 15:39:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:39:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:09,022 INFO L225 Difference]: With dead ends: 8871 [2021-06-12 15:39:09,022 INFO L226 Difference]: Without dead ends: 8601 [2021-06-12 15:39:09,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1134.0ms TimeCoverageRelationStatistics Valid=1595, Invalid=4567, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:39:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8601 states. [2021-06-12 15:39:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8601 to 6328. [2021-06-12 15:39:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:09,100 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:09,100 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:09,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:09,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:09,105 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:09,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-12 15:39:09,321 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:09,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:09,321 INFO L82 PathProgramCache]: Analyzing trace with hash -897936343, now seen corresponding path program 496 times [2021-06-12 15:39:09,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:09,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516278256] [2021-06-12 15:39:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:09,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:09,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516278256] [2021-06-12 15:39:09,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516278256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:09,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059128940] [2021-06-12 15:39:09,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:09,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:39:09,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:09,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:09,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:10,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059128940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:10,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:10,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:10,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011012519] [2021-06-12 15:39:10,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:10,034 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:10,859 INFO L93 Difference]: Finished difference Result 8821 states and 22997 transitions. [2021-06-12 15:39:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:39:10,859 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:10,867 INFO L225 Difference]: With dead ends: 8821 [2021-06-12 15:39:10,867 INFO L226 Difference]: Without dead ends: 8551 [2021-06-12 15:39:10,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1009.9ms TimeCoverageRelationStatistics Valid=1502, Invalid=4350, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:39:10,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2021-06-12 15:39:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 6328. [2021-06-12 15:39:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:10,945 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:10,945 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:10,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:10,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:10,951 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:11,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-12 15:39:11,151 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:11,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:11,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1838872295, now seen corresponding path program 497 times [2021-06-12 15:39:11,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:11,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694838988] [2021-06-12 15:39:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:11,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:11,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694838988] [2021-06-12 15:39:11,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694838988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:11,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007305970] [2021-06-12 15:39:11,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:11,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:39:11,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:11,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:11,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007305970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:11,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:11,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:11,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557192215] [2021-06-12 15:39:11,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:11,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:11,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:11,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:11,923 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:12,879 INFO L93 Difference]: Finished difference Result 8771 states and 22897 transitions. [2021-06-12 15:39:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:39:12,879 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:12,887 INFO L225 Difference]: With dead ends: 8771 [2021-06-12 15:39:12,887 INFO L226 Difference]: Without dead ends: 8501 [2021-06-12 15:39:12,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1161.1ms TimeCoverageRelationStatistics Valid=1611, Invalid=4869, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:39:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-06-12 15:39:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 6328. [2021-06-12 15:39:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:12,963 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:12,963 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:12,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:12,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:12,968 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:13,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:13,169 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:13,169 INFO L82 PathProgramCache]: Analyzing trace with hash -207543513, now seen corresponding path program 498 times [2021-06-12 15:39:13,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:13,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558101571] [2021-06-12 15:39:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:13,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:13,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558101571] [2021-06-12 15:39:13,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558101571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:13,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291807068] [2021-06-12 15:39:13,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:13,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:39:13,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:13,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:13,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:13,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291807068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:13,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:13,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:13,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358103119] [2021-06-12 15:39:13,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:13,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:13,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:13,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:13,884 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:14,765 INFO L93 Difference]: Finished difference Result 8721 states and 22797 transitions. [2021-06-12 15:39:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:39:14,765 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:14,774 INFO L225 Difference]: With dead ends: 8721 [2021-06-12 15:39:14,774 INFO L226 Difference]: Without dead ends: 8451 [2021-06-12 15:39:14,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1031.9ms TimeCoverageRelationStatistics Valid=1526, Invalid=4636, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:39:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8451 states. [2021-06-12 15:39:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8451 to 6328. [2021-06-12 15:39:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:14,855 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:14,855 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:14,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:14,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:14,860 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:15,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-12 15:39:15,061 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:15,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1053031401, now seen corresponding path program 499 times [2021-06-12 15:39:15,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:15,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543094416] [2021-06-12 15:39:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:15,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:15,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543094416] [2021-06-12 15:39:15,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543094416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:15,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702986119] [2021-06-12 15:39:15,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:15,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:15,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:15,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702986119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:15,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:15,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:15,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748606048] [2021-06-12 15:39:15,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:15,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:15,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:15,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:15,793 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:16,837 INFO L93 Difference]: Finished difference Result 8671 states and 22697 transitions. [2021-06-12 15:39:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:39:16,837 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:16,847 INFO L225 Difference]: With dead ends: 8671 [2021-06-12 15:39:16,847 INFO L226 Difference]: Without dead ends: 8401 [2021-06-12 15:39:16,847 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1188.8ms TimeCoverageRelationStatistics Valid=1643, Invalid=5163, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:39:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2021-06-12 15:39:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 6328. [2021-06-12 15:39:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:16,928 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:16,928 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:16,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:16,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:16,934 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:17,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-12 15:39:17,134 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:17,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1335932837, now seen corresponding path program 500 times [2021-06-12 15:39:17,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:17,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611135045] [2021-06-12 15:39:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:17,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:17,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611135045] [2021-06-12 15:39:17,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611135045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:17,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452488075] [2021-06-12 15:39:17,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:17,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:39:17,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:17,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:17,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:17,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452488075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:17,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:17,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:17,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945934437] [2021-06-12 15:39:17,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:17,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:17,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:17,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:17,872 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:18,809 INFO L93 Difference]: Finished difference Result 8621 states and 22597 transitions. [2021-06-12 15:39:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:39:18,809 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:18,819 INFO L225 Difference]: With dead ends: 8621 [2021-06-12 15:39:18,819 INFO L226 Difference]: Without dead ends: 8351 [2021-06-12 15:39:18,820 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1073.8ms TimeCoverageRelationStatistics Valid=1566, Invalid=4914, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:39:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2021-06-12 15:39:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 6328. [2021-06-12 15:39:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:18,901 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:18,902 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:18,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:18,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:18,907 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:19,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:19,108 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:19,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2075982699, now seen corresponding path program 501 times [2021-06-12 15:39:19,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:19,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286848096] [2021-06-12 15:39:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:19,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:19,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286848096] [2021-06-12 15:39:19,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286848096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:19,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037954537] [2021-06-12 15:39:19,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:19,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:39:19,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:19,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 15:39:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:19,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037954537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:19,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:19,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:19,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854219075] [2021-06-12 15:39:19,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:19,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:19,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:19,860 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:20,871 INFO L93 Difference]: Finished difference Result 8571 states and 22497 transitions. [2021-06-12 15:39:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:39:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:20,880 INFO L225 Difference]: With dead ends: 8571 [2021-06-12 15:39:20,880 INFO L226 Difference]: Without dead ends: 8301 [2021-06-12 15:39:20,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 1159.6ms TimeCoverageRelationStatistics Valid=1569, Invalid=5237, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:39:20,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-06-12 15:39:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6328. [2021-06-12 15:39:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:20,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:20,962 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:20,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:20,962 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:20,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:20,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:20,968 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:21,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:21,168 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:21,168 INFO L82 PathProgramCache]: Analyzing trace with hash 326775203, now seen corresponding path program 502 times [2021-06-12 15:39:21,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:21,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023302946] [2021-06-12 15:39:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:21,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:21,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023302946] [2021-06-12 15:39:21,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023302946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:21,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468324356] [2021-06-12 15:39:21,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:21,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:39:21,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:21,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:21,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468324356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:21,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:21,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:21,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458289027] [2021-06-12 15:39:21,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:21,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:21,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:21,889 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:22,939 INFO L93 Difference]: Finished difference Result 8521 states and 22397 transitions. [2021-06-12 15:39:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:39:22,939 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:22,948 INFO L225 Difference]: With dead ends: 8521 [2021-06-12 15:39:22,948 INFO L226 Difference]: Without dead ends: 8251 [2021-06-12 15:39:22,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1117.3ms TimeCoverageRelationStatistics Valid=1622, Invalid=5184, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:39:22,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-12 15:39:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 6328. [2021-06-12 15:39:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:23,029 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:23,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:23,029 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:23,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:23,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:23,034 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:23,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-12 15:39:23,235 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:23,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2126845293, now seen corresponding path program 503 times [2021-06-12 15:39:23,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:23,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641045939] [2021-06-12 15:39:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:23,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:23,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641045939] [2021-06-12 15:39:23,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641045939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:23,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057876088] [2021-06-12 15:39:23,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:23,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:39:23,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:23,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:23,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057876088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:23,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:23,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:23,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855712160] [2021-06-12 15:39:23,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:23,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:23,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:23,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:23,985 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:25,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:25,118 INFO L93 Difference]: Finished difference Result 8471 states and 22297 transitions. [2021-06-12 15:39:25,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:39:25,118 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:25,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:25,127 INFO L225 Difference]: With dead ends: 8471 [2021-06-12 15:39:25,127 INFO L226 Difference]: Without dead ends: 8201 [2021-06-12 15:39:25,128 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1279.5ms TimeCoverageRelationStatistics Valid=1755, Invalid=5727, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:39:25,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8201 states. [2021-06-12 15:39:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8201 to 6328. [2021-06-12 15:39:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:25,213 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:25,213 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:25,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:25,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:25,218 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:25,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-12 15:39:25,418 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:25,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1245286111, now seen corresponding path program 504 times [2021-06-12 15:39:25,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:25,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008152947] [2021-06-12 15:39:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:25,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:25,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008152947] [2021-06-12 15:39:25,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008152947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:25,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637715394] [2021-06-12 15:39:25,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:25,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:39:25,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:25,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:25,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:26,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637715394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:26,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:26,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:26,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947974946] [2021-06-12 15:39:26,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:26,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:26,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:26,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:26,110 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:27,174 INFO L93 Difference]: Finished difference Result 8421 states and 22197 transitions. [2021-06-12 15:39:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:39:27,175 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:27,182 INFO L225 Difference]: With dead ends: 8421 [2021-06-12 15:39:27,182 INFO L226 Difference]: Without dead ends: 8151 [2021-06-12 15:39:27,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1129.3ms TimeCoverageRelationStatistics Valid=1694, Invalid=5446, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:39:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-12 15:39:27,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 6328. [2021-06-12 15:39:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:27,257 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:27,257 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:27,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:27,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:27,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:27,262 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:27,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:27,463 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:27,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1887660527, now seen corresponding path program 505 times [2021-06-12 15:39:27,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:27,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440924432] [2021-06-12 15:39:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:27,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:27,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440924432] [2021-06-12 15:39:27,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440924432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:27,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122238115] [2021-06-12 15:39:27,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:27,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:27,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:28,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122238115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:28,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:28,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:28,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124684928] [2021-06-12 15:39:28,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:28,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:28,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:28,161 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:29,390 INFO L93 Difference]: Finished difference Result 8371 states and 22097 transitions. [2021-06-12 15:39:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:39:29,390 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:29,398 INFO L225 Difference]: With dead ends: 8371 [2021-06-12 15:39:29,399 INFO L226 Difference]: Without dead ends: 8101 [2021-06-12 15:39:29,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1318.9ms TimeCoverageRelationStatistics Valid=1835, Invalid=5997, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:39:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-06-12 15:39:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 6328. [2021-06-12 15:39:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:29,479 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:29,479 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:29,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:29,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:29,484 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:29,484 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:29,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-12 15:39:29,685 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1934207457, now seen corresponding path program 506 times [2021-06-12 15:39:29,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:29,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410038239] [2021-06-12 15:39:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:30,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:30,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410038239] [2021-06-12 15:39:30,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410038239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:30,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893672595] [2021-06-12 15:39:30,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:30,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:39:30,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:30,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:30,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893672595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:30,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:30,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:30,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054722560] [2021-06-12 15:39:30,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:30,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:30,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:30,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:30,342 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:31,389 INFO L93 Difference]: Finished difference Result 8321 states and 21997 transitions. [2021-06-12 15:39:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:39:31,389 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:31,398 INFO L225 Difference]: With dead ends: 8321 [2021-06-12 15:39:31,398 INFO L226 Difference]: Without dead ends: 8051 [2021-06-12 15:39:31,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 1148.0ms TimeCoverageRelationStatistics Valid=1782, Invalid=5700, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:39:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-12 15:39:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 6328. [2021-06-12 15:39:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:31,478 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:31,478 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:31,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:31,484 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:31,484 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:31,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-12 15:39:31,684 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:31,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1442375439, now seen corresponding path program 507 times [2021-06-12 15:39:31,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:31,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107507468] [2021-06-12 15:39:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:32,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:32,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107507468] [2021-06-12 15:39:32,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107507468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:32,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83645700] [2021-06-12 15:39:32,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:32,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:39:32,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:32,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 15:39:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:32,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83645700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:32,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:32,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:32,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347548276] [2021-06-12 15:39:32,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:32,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:32,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:32,384 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:33,624 INFO L93 Difference]: Finished difference Result 8271 states and 21897 transitions. [2021-06-12 15:39:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:39:33,625 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:33,633 INFO L225 Difference]: With dead ends: 8271 [2021-06-12 15:39:33,633 INFO L226 Difference]: Without dead ends: 8001 [2021-06-12 15:39:33,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1293.1ms TimeCoverageRelationStatistics Valid=1746, Invalid=6086, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:39:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-06-12 15:39:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 6328. [2021-06-12 15:39:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:33,712 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:33,712 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:33,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:33,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:33,718 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:33,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:33,918 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash -334315363, now seen corresponding path program 508 times [2021-06-12 15:39:33,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:33,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525113967] [2021-06-12 15:39:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:34,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:34,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525113967] [2021-06-12 15:39:34,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525113967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:34,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899870820] [2021-06-12 15:39:34,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:34,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:39:34,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:34,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:34,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:34,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899870820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:34,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:34,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:34,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97715827] [2021-06-12 15:39:34,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:34,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:34,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:34,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:34,596 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:35,734 INFO L93 Difference]: Finished difference Result 8221 states and 21797 transitions. [2021-06-12 15:39:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:39:35,734 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:35,743 INFO L225 Difference]: With dead ends: 8221 [2021-06-12 15:39:35,743 INFO L226 Difference]: Without dead ends: 7951 [2021-06-12 15:39:35,743 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 1173.1ms TimeCoverageRelationStatistics Valid=1886, Invalid=5946, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:39:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-12 15:39:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6328. [2021-06-12 15:39:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:35,821 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:35,821 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:35,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:35,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:35,826 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:36,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-06-12 15:39:36,027 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:36,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1765326221, now seen corresponding path program 509 times [2021-06-12 15:39:36,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:36,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517507589] [2021-06-12 15:39:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:36,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:36,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517507589] [2021-06-12 15:39:36,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517507589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:36,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511239907] [2021-06-12 15:39:36,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:36,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:39:36,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:36,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:36,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:36,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511239907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:36,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:36,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:36,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004718327] [2021-06-12 15:39:36,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:36,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:36,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:36,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:36,736 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:38,185 INFO L93 Difference]: Finished difference Result 8171 states and 21697 transitions. [2021-06-12 15:39:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:39:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:38,192 INFO L225 Difference]: With dead ends: 8171 [2021-06-12 15:39:38,192 INFO L226 Difference]: Without dead ends: 7901 [2021-06-12 15:39:38,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1441.2ms TimeCoverageRelationStatistics Valid=2043, Invalid=6513, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:39:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-06-12 15:39:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 6328. [2021-06-12 15:39:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:38,266 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:38,267 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:38,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:38,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:38,272 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:38,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:38,472 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1019440997, now seen corresponding path program 510 times [2021-06-12 15:39:38,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:38,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628198889] [2021-06-12 15:39:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:38,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:38,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628198889] [2021-06-12 15:39:38,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628198889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:38,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727678069] [2021-06-12 15:39:38,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:38,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:39:38,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:38,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:39,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727678069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:39,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:39,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:39,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736321052] [2021-06-12 15:39:39,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:39,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:39,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:39,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:39,139 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:40,401 INFO L93 Difference]: Finished difference Result 8121 states and 21597 transitions. [2021-06-12 15:39:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:39:40,401 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:40,408 INFO L225 Difference]: With dead ends: 8121 [2021-06-12 15:39:40,408 INFO L226 Difference]: Without dead ends: 7851 [2021-06-12 15:39:40,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 1229.4ms TimeCoverageRelationStatistics Valid=2006, Invalid=6184, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:39:40,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-06-12 15:39:40,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 6328. [2021-06-12 15:39:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:40,483 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:40,483 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:40,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:40,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:40,489 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:40,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:40,689 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:40,690 INFO L82 PathProgramCache]: Analyzing trace with hash -379782773, now seen corresponding path program 511 times [2021-06-12 15:39:40,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:40,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153701209] [2021-06-12 15:39:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:41,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:41,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153701209] [2021-06-12 15:39:41,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153701209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:41,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745722582] [2021-06-12 15:39:41,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:41,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:41,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:41,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745722582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:41,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:41,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:41,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588296614] [2021-06-12 15:39:41,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:41,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:41,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:41,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:41,376 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:42,886 INFO L93 Difference]: Finished difference Result 8071 states and 21497 transitions. [2021-06-12 15:39:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:39:42,886 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:42,894 INFO L225 Difference]: With dead ends: 8071 [2021-06-12 15:39:42,894 INFO L226 Difference]: Without dead ends: 7801 [2021-06-12 15:39:42,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1439.1ms TimeCoverageRelationStatistics Valid=2171, Invalid=6759, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:39:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-06-12 15:39:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 6328. [2021-06-12 15:39:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:42,968 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:42,968 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:42,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:42,973 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:42,973 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:43,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:43,174 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:43,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1154701799, now seen corresponding path program 512 times [2021-06-12 15:39:43,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:43,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012317359] [2021-06-12 15:39:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:43,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:43,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012317359] [2021-06-12 15:39:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012317359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:43,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237660619] [2021-06-12 15:39:43,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:43,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:39:43,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:43,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:43,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:43,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237660619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:43,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:43,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:43,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754022706] [2021-06-12 15:39:43,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:43,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:43,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:43,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:43,837 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:45,063 INFO L93 Difference]: Finished difference Result 8021 states and 21397 transitions. [2021-06-12 15:39:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:39:45,064 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:45,072 INFO L225 Difference]: With dead ends: 8021 [2021-06-12 15:39:45,072 INFO L226 Difference]: Without dead ends: 7751 [2021-06-12 15:39:45,073 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1223.9ms TimeCoverageRelationStatistics Valid=2142, Invalid=6414, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:39:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-06-12 15:39:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 6328. [2021-06-12 15:39:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:45,146 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:45,147 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:45,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:45,147 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:45,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:45,152 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:45,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 516 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-12 15:39:45,352 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:45,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1608615159, now seen corresponding path program 513 times [2021-06-12 15:39:45,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:45,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204240921] [2021-06-12 15:39:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:45,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:45,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204240921] [2021-06-12 15:39:45,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204240921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:45,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43924070] [2021-06-12 15:39:45,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:45,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:39:45,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:45,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 15:39:45,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:46,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43924070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:46,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:46,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:46,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540735365] [2021-06-12 15:39:46,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:46,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:46,049 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:47,430 INFO L93 Difference]: Finished difference Result 7971 states and 21297 transitions. [2021-06-12 15:39:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:39:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:47,437 INFO L225 Difference]: With dead ends: 7971 [2021-06-12 15:39:47,437 INFO L226 Difference]: Without dead ends: 7701 [2021-06-12 15:39:47,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 1434.4ms TimeCoverageRelationStatistics Valid=2040, Invalid=6890, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:39:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-06-12 15:39:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 6328. [2021-06-12 15:39:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:47,509 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:47,509 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:47,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:47,514 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:47,515 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:47,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-12 15:39:47,715 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:47,715 INFO L82 PathProgramCache]: Analyzing trace with hash -730603241, now seen corresponding path program 514 times [2021-06-12 15:39:47,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:47,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986475226] [2021-06-12 15:39:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:48,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:48,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986475226] [2021-06-12 15:39:48,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986475226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:48,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300513418] [2021-06-12 15:39:48,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:48,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:39:48,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:48,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:48,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:48,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300513418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:48,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:48,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:48,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957989449] [2021-06-12 15:39:48,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:48,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:48,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:48,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:48,353 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:49,611 INFO L93 Difference]: Finished difference Result 7921 states and 21197 transitions. [2021-06-12 15:39:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:39:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:49,619 INFO L225 Difference]: With dead ends: 7921 [2021-06-12 15:39:49,619 INFO L226 Difference]: Without dead ends: 7651 [2021-06-12 15:39:49,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 1294.2ms TimeCoverageRelationStatistics Valid=2294, Invalid=6636, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:39:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-06-12 15:39:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 6328. [2021-06-12 15:39:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:49,696 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:49,696 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:49,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:49,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:49,702 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:49,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:49,902 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1630658041, now seen corresponding path program 515 times [2021-06-12 15:39:49,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:49,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123399466] [2021-06-12 15:39:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:50,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:50,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123399466] [2021-06-12 15:39:50,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123399466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:50,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944008595] [2021-06-12 15:39:50,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:50,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:39:50,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:50,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:50,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944008595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:50,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:50,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:50,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490354031] [2021-06-12 15:39:50,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:50,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:50,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:50,585 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:52,127 INFO L93 Difference]: Finished difference Result 7871 states and 21097 transitions. [2021-06-12 15:39:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 15:39:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:52,134 INFO L225 Difference]: With dead ends: 7871 [2021-06-12 15:39:52,135 INFO L226 Difference]: Without dead ends: 7601 [2021-06-12 15:39:52,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 1589.5ms TimeCoverageRelationStatistics Valid=2475, Invalid=7227, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 15:39:52,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-06-12 15:39:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 6328. [2021-06-12 15:39:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:52,211 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:52,211 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:52,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:52,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:52,217 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:52,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-12 15:39:52,417 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2059722347, now seen corresponding path program 516 times [2021-06-12 15:39:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:52,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615693255] [2021-06-12 15:39:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:52,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:52,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615693255] [2021-06-12 15:39:52,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615693255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:52,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274303570] [2021-06-12 15:39:52,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:52,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:39:52,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:52,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 15:39:52,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:53,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274303570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:53,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:53,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:53,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879856383] [2021-06-12 15:39:53,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:53,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:53,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:53,090 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:54,368 INFO L93 Difference]: Finished difference Result 7821 states and 20997 transitions. [2021-06-12 15:39:54,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 15:39:54,368 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:54,376 INFO L225 Difference]: With dead ends: 7821 [2021-06-12 15:39:54,377 INFO L226 Difference]: Without dead ends: 7551 [2021-06-12 15:39:54,377 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 1306.9ms TimeCoverageRelationStatistics Valid=2462, Invalid=6850, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 15:39:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-12 15:39:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 6328. [2021-06-12 15:39:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:54,453 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:54,453 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:54,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:54,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:54,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:54,458 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:54,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:54,659 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:54,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:54,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1549061765, now seen corresponding path program 517 times [2021-06-12 15:39:54,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:54,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856118578] [2021-06-12 15:39:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:55,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:55,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856118578] [2021-06-12 15:39:55,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856118578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:55,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70909215] [2021-06-12 15:39:55,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:55,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:55,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:55,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70909215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:55,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:55,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:55,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968311760] [2021-06-12 15:39:55,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:55,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:55,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:55,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:55,342 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:56,972 INFO L93 Difference]: Finished difference Result 7771 states and 20897 transitions. [2021-06-12 15:39:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 15:39:56,973 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:56,980 INFO L225 Difference]: With dead ends: 7771 [2021-06-12 15:39:56,980 INFO L226 Difference]: Without dead ends: 7501 [2021-06-12 15:39:56,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 1658.2ms TimeCoverageRelationStatistics Valid=2651, Invalid=7449, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 15:39:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-06-12 15:39:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 6328. [2021-06-12 15:39:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:57,051 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:57,051 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:57,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:57,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:57,056 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:57,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-12 15:39:57,257 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:57,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1464027027, now seen corresponding path program 518 times [2021-06-12 15:39:57,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:57,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126633511] [2021-06-12 15:39:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:57,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:57,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126633511] [2021-06-12 15:39:57,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126633511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:57,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123171007] [2021-06-12 15:39:57,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:57,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:39:57,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:57,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:57,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:57,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123171007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:57,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:57,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:57,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918608526] [2021-06-12 15:39:57,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:57,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:57,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:57,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:57,913 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:59,305 INFO L93 Difference]: Finished difference Result 7721 states and 20797 transitions. [2021-06-12 15:39:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 15:39:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:39:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:59,313 INFO L225 Difference]: With dead ends: 7721 [2021-06-12 15:39:59,313 INFO L226 Difference]: Without dead ends: 7451 [2021-06-12 15:39:59,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 1416.4ms TimeCoverageRelationStatistics Valid=2646, Invalid=7056, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 15:39:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-06-12 15:39:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 6328. [2021-06-12 15:39:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:59,389 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:59,390 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:59,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:59,395 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:59,395 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:39:59,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:59,595 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:59,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1395875971, now seen corresponding path program 519 times [2021-06-12 15:39:59,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:59,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312231592] [2021-06-12 15:39:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:39:59,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:59,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312231592] [2021-06-12 15:39:59,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312231592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:59,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262261847] [2021-06-12 15:39:59,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:00,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:40:00,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:00,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 15:40:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:00,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262261847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:00,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:00,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:40:00,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043682117] [2021-06-12 15:40:00,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:00,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:00,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:00,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:00,255 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:01,877 INFO L93 Difference]: Finished difference Result 7671 states and 20697 transitions. [2021-06-12 15:40:01,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 15:40:01,878 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:40:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:01,886 INFO L225 Difference]: With dead ends: 7671 [2021-06-12 15:40:01,886 INFO L226 Difference]: Without dead ends: 7401 [2021-06-12 15:40:01,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 1547.5ms TimeCoverageRelationStatistics Valid=2451, Invalid=7649, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 15:40:01,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-06-12 15:40:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 6328. [2021-06-12 15:40:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:40:01,967 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:40:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:01,967 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:40:01,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:40:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:40:01,973 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:01,973 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:02,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:02,173 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 98906897, now seen corresponding path program 520 times [2021-06-12 15:40:02,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:02,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995970849] [2021-06-12 15:40:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:02,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:02,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995970849] [2021-06-12 15:40:02,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995970849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:02,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210051610] [2021-06-12 15:40:02,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:02,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:40:02,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:02,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:40:02,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:02,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210051610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:02,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:02,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:40:02,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196070526] [2021-06-12 15:40:02,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:02,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:02,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:02,872 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:04,403 INFO L93 Difference]: Finished difference Result 7621 states and 20597 transitions. [2021-06-12 15:40:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 15:40:04,404 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:40:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:04,412 INFO L225 Difference]: With dead ends: 7621 [2021-06-12 15:40:04,412 INFO L226 Difference]: Without dead ends: 7351 [2021-06-12 15:40:04,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 1536.0ms TimeCoverageRelationStatistics Valid=2846, Invalid=7254, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 15:40:04,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-06-12 15:40:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 6328. [2021-06-12 15:40:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:40:04,508 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:40:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:04,508 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:40:04,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:04,508 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:40:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:40:04,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:04,513 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:04,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:04,714 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash 528660481, now seen corresponding path program 521 times [2021-06-12 15:40:04,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:04,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380860691] [2021-06-12 15:40:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:05,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:05,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380860691] [2021-06-12 15:40:05,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380860691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:05,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611572718] [2021-06-12 15:40:05,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:05,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:40:05,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:05,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:40:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:05,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611572718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:05,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:05,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:40:05,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792776797] [2021-06-12 15:40:05,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:05,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:05,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:05,447 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:07,412 INFO L93 Difference]: Finished difference Result 8079 states and 21863 transitions. [2021-06-12 15:40:07,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 15:40:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:40:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:07,419 INFO L225 Difference]: With dead ends: 8079 [2021-06-12 15:40:07,420 INFO L226 Difference]: Without dead ends: 7456 [2021-06-12 15:40:07,420 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 1922.7ms TimeCoverageRelationStatistics Valid=3074, Invalid=8268, Unknown=0, NotChecked=0, Total=11342 [2021-06-12 15:40:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2021-06-12 15:40:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 6238. [2021-06-12 15:40:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6238 states, 6237 states have (on average 2.829565496232163) internal successors, (17648), 6237 states have internal predecessors, (17648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6238 states to 6238 states and 17648 transitions. [2021-06-12 15:40:07,507 INFO L78 Accepts]: Start accepts. Automaton has 6238 states and 17648 transitions. Word has length 190 [2021-06-12 15:40:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:07,507 INFO L482 AbstractCegarLoop]: Abstraction has 6238 states and 17648 transitions. [2021-06-12 15:40:07,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 6238 states and 17648 transitions. [2021-06-12 15:40:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:40:07,512 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:07,512 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:07,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:07,713 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash 470926351, now seen corresponding path program 522 times [2021-06-12 15:40:07,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:07,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104729486] [2021-06-12 15:40:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:08,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:08,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104729486] [2021-06-12 15:40:08,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104729486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:08,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432798623] [2021-06-12 15:40:08,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:08,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:40:08,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:08,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:08,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:08,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432798623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:08,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:08,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:40:08,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016345866] [2021-06-12 15:40:08,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:08,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:08,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:08,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:08,371 INFO L87 Difference]: Start difference. First operand 6238 states and 17648 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:09,917 INFO L93 Difference]: Finished difference Result 8308 states and 22581 transitions. [2021-06-12 15:40:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 15:40:09,917 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:40:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:09,926 INFO L225 Difference]: With dead ends: 8308 [2021-06-12 15:40:09,927 INFO L226 Difference]: Without dead ends: 8038 [2021-06-12 15:40:09,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 1514.9ms TimeCoverageRelationStatistics Valid=3063, Invalid=7443, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 15:40:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8038 states. [2021-06-12 15:40:09,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8038 to 6418. [2021-06-12 15:40:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6418 states, 6417 states have (on average 2.837307152875175) internal successors, (18207), 6417 states have internal predecessors, (18207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6418 states to 6418 states and 18207 transitions. [2021-06-12 15:40:10,012 INFO L78 Accepts]: Start accepts. Automaton has 6418 states and 18207 transitions. Word has length 190 [2021-06-12 15:40:10,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:10,012 INFO L482 AbstractCegarLoop]: Abstraction has 6418 states and 18207 transitions. [2021-06-12 15:40:10,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6418 states and 18207 transitions. [2021-06-12 15:40:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:40:10,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:10,017 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:10,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-12 15:40:10,218 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash 493269601, now seen corresponding path program 523 times [2021-06-12 15:40:10,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:10,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004793347] [2021-06-12 15:40:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:10,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:10,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004793347] [2021-06-12 15:40:10,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004793347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:10,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424608457] [2021-06-12 15:40:10,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:40:10,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:10,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424608457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:10,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:10,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:40:10,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431574240] [2021-06-12 15:40:10,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:10,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:10,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:10,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:10,965 INFO L87 Difference]: Start difference. First operand 6418 states and 18207 transitions. Second operand has 39 states, 39 states have (on average 4.948717948717949) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:12,904 INFO L93 Difference]: Finished difference Result 8251 states and 22441 transitions. [2021-06-12 15:40:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 15:40:12,904 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.948717948717949) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-12 15:40:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:12,911 INFO L225 Difference]: With dead ends: 8251 [2021-06-12 15:40:12,911 INFO L226 Difference]: Without dead ends: 7676 [2021-06-12 15:40:12,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 1943.4ms TimeCoverageRelationStatistics Valid=3333, Invalid=8657, Unknown=0, NotChecked=0, Total=11990 [2021-06-12 15:40:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-12 15:40:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6453. [2021-06-12 15:40:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:12,983 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 190 [2021-06-12 15:40:12,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:12,983 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:12,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.948717948717949) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:12,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:12,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:12,988 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:13,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-12 15:40:13,189 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash 131178430, now seen corresponding path program 524 times [2021-06-12 15:40:13,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:13,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073520467] [2021-06-12 15:40:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:13,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:13,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073520467] [2021-06-12 15:40:13,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073520467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:13,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318828218] [2021-06-12 15:40:13,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:13,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:40:13,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:13,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:13,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:14,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318828218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:14,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:14,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:14,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52126124] [2021-06-12 15:40:14,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:14,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:14,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:14,025 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:14,901 INFO L93 Difference]: Finished difference Result 8396 states and 22297 transitions. [2021-06-12 15:40:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:40:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:14,909 INFO L225 Difference]: With dead ends: 8396 [2021-06-12 15:40:14,909 INFO L226 Difference]: Without dead ends: 8126 [2021-06-12 15:40:14,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1131.5ms TimeCoverageRelationStatistics Valid=1551, Invalid=4149, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:40:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-12 15:40:14,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6453. [2021-06-12 15:40:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:14,986 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:14,986 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:14,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:14,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:14,992 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:15,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-12 15:40:15,192 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:15,193 INFO L82 PathProgramCache]: Analyzing trace with hash -715113298, now seen corresponding path program 525 times [2021-06-12 15:40:15,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:15,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958393479] [2021-06-12 15:40:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:15,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:15,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958393479] [2021-06-12 15:40:15,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958393479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:15,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144442016] [2021-06-12 15:40:15,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:15,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:40:15,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:15,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:15,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:16,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144442016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:16,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:16,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:16,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646914570] [2021-06-12 15:40:16,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:16,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:16,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:16,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:16,025 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:16,961 INFO L93 Difference]: Finished difference Result 9141 states and 23787 transitions. [2021-06-12 15:40:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:40:16,962 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:16,971 INFO L225 Difference]: With dead ends: 9141 [2021-06-12 15:40:16,971 INFO L226 Difference]: Without dead ends: 8871 [2021-06-12 15:40:16,972 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1169.5ms TimeCoverageRelationStatistics Valid=1625, Invalid=4537, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:40:16,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8871 states. [2021-06-12 15:40:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8871 to 6453. [2021-06-12 15:40:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:17,058 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:17,058 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:17,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:17,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:17,064 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:17,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:17,265 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2045297596, now seen corresponding path program 526 times [2021-06-12 15:40:17,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:17,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317965258] [2021-06-12 15:40:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:17,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:17,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317965258] [2021-06-12 15:40:17,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317965258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:17,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228803021] [2021-06-12 15:40:17,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:17,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:40:17,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:17,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:17,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:18,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228803021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:18,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:18,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:18,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433036669] [2021-06-12 15:40:18,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:18,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:18,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:18,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:18,024 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:18,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:18,914 INFO L93 Difference]: Finished difference Result 9096 states and 23697 transitions. [2021-06-12 15:40:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:40:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:18,924 INFO L225 Difference]: With dead ends: 9096 [2021-06-12 15:40:18,924 INFO L226 Difference]: Without dead ends: 8826 [2021-06-12 15:40:18,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1074.8ms TimeCoverageRelationStatistics Valid=1611, Invalid=4551, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:40:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8826 states. [2021-06-12 15:40:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8826 to 6453. [2021-06-12 15:40:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:19,012 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:19,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:19,012 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:19,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:19,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:19,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:19,017 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:19,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:19,218 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:19,218 INFO L82 PathProgramCache]: Analyzing trace with hash 481938604, now seen corresponding path program 527 times [2021-06-12 15:40:19,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:19,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446615004] [2021-06-12 15:40:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:19,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:19,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446615004] [2021-06-12 15:40:19,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446615004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:19,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545773822] [2021-06-12 15:40:19,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:19,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:40:19,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:19,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:20,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545773822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:20,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:20,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:20,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411671004] [2021-06-12 15:40:20,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:20,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:20,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:20,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:20,046 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:21,065 INFO L93 Difference]: Finished difference Result 9046 states and 23597 transitions. [2021-06-12 15:40:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:40:21,066 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:21,076 INFO L225 Difference]: With dead ends: 9046 [2021-06-12 15:40:21,076 INFO L226 Difference]: Without dead ends: 8776 [2021-06-12 15:40:21,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1215.2ms TimeCoverageRelationStatistics Valid=1633, Invalid=4847, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:40:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8776 states. [2021-06-12 15:40:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8776 to 6453. [2021-06-12 15:40:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:21,167 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:21,167 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:21,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:21,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:21,173 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:21,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-12 15:40:21,389 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2120274630, now seen corresponding path program 528 times [2021-06-12 15:40:21,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:21,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556167734] [2021-06-12 15:40:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:21,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:21,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556167734] [2021-06-12 15:40:21,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556167734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:21,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328142256] [2021-06-12 15:40:21,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:21,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:40:21,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:21,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:21,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:22,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328142256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:22,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:22,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:22,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721189651] [2021-06-12 15:40:22,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:22,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:22,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:22,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:22,184 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:23,124 INFO L93 Difference]: Finished difference Result 8996 states and 23497 transitions. [2021-06-12 15:40:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:40:23,124 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:23,134 INFO L225 Difference]: With dead ends: 8996 [2021-06-12 15:40:23,135 INFO L226 Difference]: Without dead ends: 8726 [2021-06-12 15:40:23,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 1066.1ms TimeCoverageRelationStatistics Valid=1633, Invalid=4847, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:40:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2021-06-12 15:40:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 6453. [2021-06-12 15:40:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:23,223 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:23,223 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:23,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:23,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:23,228 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:23,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-12 15:40:23,429 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:23,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1233756714, now seen corresponding path program 529 times [2021-06-12 15:40:23,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:23,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831961175] [2021-06-12 15:40:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:23,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:23,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831961175] [2021-06-12 15:40:23,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831961175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:23,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924638605] [2021-06-12 15:40:23,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:23,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:23,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:24,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924638605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:24,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:24,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:24,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81591264] [2021-06-12 15:40:24,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:24,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:24,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:24,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:24,216 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:25,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:25,220 INFO L93 Difference]: Finished difference Result 8946 states and 23397 transitions. [2021-06-12 15:40:25,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:40:25,220 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:25,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:25,230 INFO L225 Difference]: With dead ends: 8946 [2021-06-12 15:40:25,230 INFO L226 Difference]: Without dead ends: 8676 [2021-06-12 15:40:25,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1163.3ms TimeCoverageRelationStatistics Valid=1657, Invalid=5149, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:40:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-06-12 15:40:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6453. [2021-06-12 15:40:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:25,315 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:25,316 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:25,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:25,321 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:25,321 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:25,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:25,525 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:25,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1429881800, now seen corresponding path program 530 times [2021-06-12 15:40:25,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:25,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201941317] [2021-06-12 15:40:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:25,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:25,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201941317] [2021-06-12 15:40:25,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201941317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:25,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404416838] [2021-06-12 15:40:25,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:26,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:40:26,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:26,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:26,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404416838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:26,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:26,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:26,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792024607] [2021-06-12 15:40:26,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:26,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:26,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:26,238 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:27,174 INFO L93 Difference]: Finished difference Result 8896 states and 23297 transitions. [2021-06-12 15:40:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:40:27,174 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:27,183 INFO L225 Difference]: With dead ends: 8896 [2021-06-12 15:40:27,184 INFO L226 Difference]: Without dead ends: 8626 [2021-06-12 15:40:27,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1077.3ms TimeCoverageRelationStatistics Valid=1671, Invalid=5135, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:40:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-06-12 15:40:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 6453. [2021-06-12 15:40:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:27,268 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:27,269 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:27,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:27,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:27,274 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:27,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:27,475 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:27,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2019597608, now seen corresponding path program 531 times [2021-06-12 15:40:27,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:27,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161237144] [2021-06-12 15:40:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:27,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:27,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161237144] [2021-06-12 15:40:27,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161237144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:27,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217256395] [2021-06-12 15:40:27,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:28,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:40:28,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:28,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-12 15:40:28,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:28,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217256395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:28,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:28,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:28,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86514561] [2021-06-12 15:40:28,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:28,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:28,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:28,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:28,250 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:29,342 INFO L93 Difference]: Finished difference Result 8846 states and 23197 transitions. [2021-06-12 15:40:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:40:29,342 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:29,352 INFO L225 Difference]: With dead ends: 8846 [2021-06-12 15:40:29,352 INFO L226 Difference]: Without dead ends: 8576 [2021-06-12 15:40:29,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 1196.3ms TimeCoverageRelationStatistics Valid=1676, Invalid=5464, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:40:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8576 states. [2021-06-12 15:40:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8576 to 6453. [2021-06-12 15:40:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:29,444 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:29,444 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:29,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:29,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:29,450 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:29,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-12 15:40:29,650 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:29,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:29,650 INFO L82 PathProgramCache]: Analyzing trace with hash 113594550, now seen corresponding path program 532 times [2021-06-12 15:40:29,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:29,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555099887] [2021-06-12 15:40:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:30,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:30,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555099887] [2021-06-12 15:40:30,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555099887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:30,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126731677] [2021-06-12 15:40:30,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:30,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:40:30,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:30,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:30,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126731677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:30,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:30,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:30,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424037052] [2021-06-12 15:40:30,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:30,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:30,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:30,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:30,352 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:31,438 INFO L93 Difference]: Finished difference Result 8796 states and 23097 transitions. [2021-06-12 15:40:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:40:31,438 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:31,445 INFO L225 Difference]: With dead ends: 8796 [2021-06-12 15:40:31,446 INFO L226 Difference]: Without dead ends: 8526 [2021-06-12 15:40:31,446 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 1110.4ms TimeCoverageRelationStatistics Valid=1725, Invalid=5415, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:40:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8526 states. [2021-06-12 15:40:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8526 to 6453. [2021-06-12 15:40:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:31,522 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:31,522 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:31,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:31,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:31,528 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:31,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-12 15:40:31,728 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash 996646310, now seen corresponding path program 533 times [2021-06-12 15:40:31,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:31,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862169081] [2021-06-12 15:40:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:32,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:32,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862169081] [2021-06-12 15:40:32,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862169081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:32,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593995648] [2021-06-12 15:40:32,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:32,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:40:32,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:32,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:32,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:32,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593995648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:32,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:32,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:32,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824840164] [2021-06-12 15:40:32,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:32,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:32,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:32,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:32,479 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:33,650 INFO L93 Difference]: Finished difference Result 8746 states and 22997 transitions. [2021-06-12 15:40:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:40:33,651 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:33,659 INFO L225 Difference]: With dead ends: 8746 [2021-06-12 15:40:33,659 INFO L226 Difference]: Without dead ends: 8476 [2021-06-12 15:40:33,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1258.0ms TimeCoverageRelationStatistics Valid=1753, Invalid=5729, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:40:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8476 states. [2021-06-12 15:40:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8476 to 6453. [2021-06-12 15:40:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:33,741 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:33,741 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:33,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:33,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:33,746 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:33,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-12 15:40:33,947 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:33,947 INFO L82 PathProgramCache]: Analyzing trace with hash -895563084, now seen corresponding path program 534 times [2021-06-12 15:40:33,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:33,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096540313] [2021-06-12 15:40:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:34,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:34,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096540313] [2021-06-12 15:40:34,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096540313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006382785] [2021-06-12 15:40:34,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:34,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:40:34,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:34,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:34,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:34,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006382785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:34,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:34,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:34,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228540950] [2021-06-12 15:40:34,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:34,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:34,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:34,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:34,670 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:35,743 INFO L93 Difference]: Finished difference Result 8696 states and 22897 transitions. [2021-06-12 15:40:35,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:40:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:35,753 INFO L225 Difference]: With dead ends: 8696 [2021-06-12 15:40:35,753 INFO L226 Difference]: Without dead ends: 8426 [2021-06-12 15:40:35,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 1148.5ms TimeCoverageRelationStatistics Valid=1795, Invalid=5687, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:40:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-06-12 15:40:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 6453. [2021-06-12 15:40:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:35,839 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:35,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:35,839 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:35,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:35,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:35,845 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:36,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-12 15:40:36,045 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash 945783716, now seen corresponding path program 535 times [2021-06-12 15:40:36,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:36,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433728043] [2021-06-12 15:40:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:36,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:36,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433728043] [2021-06-12 15:40:36,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433728043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:36,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268241623] [2021-06-12 15:40:36,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:36,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:36,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268241623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:36,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:36,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:36,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787086326] [2021-06-12 15:40:36,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:36,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:36,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:36,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:36,795 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:37,991 INFO L93 Difference]: Finished difference Result 8646 states and 22797 transitions. [2021-06-12 15:40:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:40:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:38,000 INFO L225 Difference]: With dead ends: 8646 [2021-06-12 15:40:38,001 INFO L226 Difference]: Without dead ends: 8376 [2021-06-12 15:40:38,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1293.1ms TimeCoverageRelationStatistics Valid=1825, Invalid=6007, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:40:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-06-12 15:40:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 6453. [2021-06-12 15:40:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:38,084 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:38,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:38,085 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:38,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:38,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:38,090 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:38,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-12 15:40:38,291 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:38,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:38,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1827342898, now seen corresponding path program 536 times [2021-06-12 15:40:38,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:38,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643660918] [2021-06-12 15:40:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:38,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:38,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643660918] [2021-06-12 15:40:38,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643660918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:38,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323743403] [2021-06-12 15:40:38,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:38,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:40:38,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:38,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:39,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323743403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:39,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:39,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:39,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311229295] [2021-06-12 15:40:39,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:39,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:39,003 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:40,094 INFO L93 Difference]: Finished difference Result 8596 states and 22697 transitions. [2021-06-12 15:40:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:40:40,095 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:40,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:40,105 INFO L225 Difference]: With dead ends: 8596 [2021-06-12 15:40:40,105 INFO L226 Difference]: Without dead ends: 8326 [2021-06-12 15:40:40,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 1184.8ms TimeCoverageRelationStatistics Valid=1881, Invalid=5951, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:40:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8326 states. [2021-06-12 15:40:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 6453. [2021-06-12 15:40:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:40,190 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:40,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:40,191 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:40,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:40,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:40,196 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:40,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:40,413 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:40,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1184968482, now seen corresponding path program 537 times [2021-06-12 15:40:40,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:40,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627063497] [2021-06-12 15:40:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:40,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:40,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627063497] [2021-06-12 15:40:40,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627063497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:40,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029974469] [2021-06-12 15:40:40,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:40,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:40:40,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-12 15:40:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:41,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029974469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:41,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:41,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:41,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994469104] [2021-06-12 15:40:41,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:41,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:41,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:41,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:41,204 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:42,588 INFO L93 Difference]: Finished difference Result 8546 states and 22597 transitions. [2021-06-12 15:40:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:40:42,588 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:42,595 INFO L225 Difference]: With dead ends: 8546 [2021-06-12 15:40:42,595 INFO L226 Difference]: Without dead ends: 8276 [2021-06-12 15:40:42,596 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1477.4ms TimeCoverageRelationStatistics Valid=1847, Invalid=6343, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:40:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-12 15:40:42,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6453. [2021-06-12 15:40:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:42,672 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:42,672 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:42,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:42,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:42,678 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:42,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-12 15:40:42,878 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:42,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1138421552, now seen corresponding path program 538 times [2021-06-12 15:40:42,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:42,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354437768] [2021-06-12 15:40:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:43,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354437768] [2021-06-12 15:40:43,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354437768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751313541] [2021-06-12 15:40:43,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:43,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:40:43,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:43,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:43,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:43,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751313541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:43,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:43,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:43,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727976875] [2021-06-12 15:40:43,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:43,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:43,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:43,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:43,559 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:44,731 INFO L93 Difference]: Finished difference Result 8496 states and 22497 transitions. [2021-06-12 15:40:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:40:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:44,738 INFO L225 Difference]: With dead ends: 8496 [2021-06-12 15:40:44,738 INFO L226 Difference]: Without dead ends: 8226 [2021-06-12 15:40:44,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 1204.0ms TimeCoverageRelationStatistics Valid=1983, Invalid=6207, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:40:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-06-12 15:40:44,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 6453. [2021-06-12 15:40:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:44,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:44,812 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:44,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:44,812 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:44,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:44,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:44,818 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:45,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:45,018 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:45,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:45,018 INFO L82 PathProgramCache]: Analyzing trace with hash 220037152, now seen corresponding path program 539 times [2021-06-12 15:40:45,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:45,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650977762] [2021-06-12 15:40:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:45,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:45,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650977762] [2021-06-12 15:40:45,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650977762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:45,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962080563] [2021-06-12 15:40:45,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:45,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:40:45,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:45,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962080563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:45,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:45,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:45,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609162266] [2021-06-12 15:40:45,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:45,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:45,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:45,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:45,707 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:47,034 INFO L93 Difference]: Finished difference Result 8446 states and 22397 transitions. [2021-06-12 15:40:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:40:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:47,043 INFO L225 Difference]: With dead ends: 8446 [2021-06-12 15:40:47,043 INFO L226 Difference]: Without dead ends: 8176 [2021-06-12 15:40:47,043 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 1377.8ms TimeCoverageRelationStatistics Valid=2017, Invalid=6539, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:40:47,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-12 15:40:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6453. [2021-06-12 15:40:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:47,125 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:47,125 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:47,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:47,131 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:47,131 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:47,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-12 15:40:47,332 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:47,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1556653650, now seen corresponding path program 540 times [2021-06-12 15:40:47,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:47,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147696206] [2021-06-12 15:40:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:47,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:47,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147696206] [2021-06-12 15:40:47,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147696206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:47,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168701353] [2021-06-12 15:40:47,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:47,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:40:47,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:47,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:47,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:48,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168701353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:48,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:48,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:48,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019320975] [2021-06-12 15:40:48,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:48,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:48,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:48,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:48,016 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:49,311 INFO L93 Difference]: Finished difference Result 8396 states and 22297 transitions. [2021-06-12 15:40:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:40:49,311 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:49,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:49,321 INFO L225 Difference]: With dead ends: 8396 [2021-06-12 15:40:49,321 INFO L226 Difference]: Without dead ends: 8126 [2021-06-12 15:40:49,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 1316.3ms TimeCoverageRelationStatistics Valid=2101, Invalid=6455, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:40:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-12 15:40:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6453. [2021-06-12 15:40:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:49,406 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:49,406 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:49,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:49,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:49,412 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:49,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:49,612 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash 542987934, now seen corresponding path program 541 times [2021-06-12 15:40:49,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:49,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385594757] [2021-06-12 15:40:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:50,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:50,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385594757] [2021-06-12 15:40:50,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385594757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:50,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124832070] [2021-06-12 15:40:50,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:50,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:50,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:50,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124832070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:50,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:50,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:50,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893208937] [2021-06-12 15:40:50,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:50,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:50,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:50,340 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:51,687 INFO L93 Difference]: Finished difference Result 8346 states and 22197 transitions. [2021-06-12 15:40:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:40:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:51,697 INFO L225 Difference]: With dead ends: 8346 [2021-06-12 15:40:51,697 INFO L226 Difference]: Without dead ends: 8076 [2021-06-12 15:40:51,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 1421.1ms TimeCoverageRelationStatistics Valid=2137, Invalid=6793, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:40:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-12 15:40:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 6453. [2021-06-12 15:40:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:51,783 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:51,783 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:51,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:51,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:51,789 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:51,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-12 15:40:51,989 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2053188012, now seen corresponding path program 542 times [2021-06-12 15:40:51,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:51,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523256216] [2021-06-12 15:40:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:52,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:52,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523256216] [2021-06-12 15:40:52,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523256216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:52,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554437468] [2021-06-12 15:40:52,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:52,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:40:52,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:52,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554437468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:52,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:52,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:52,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877228622] [2021-06-12 15:40:52,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:52,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:52,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:52,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:52,668 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:53,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:53,874 INFO L93 Difference]: Finished difference Result 8296 states and 22097 transitions. [2021-06-12 15:40:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:40:53,875 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:53,881 INFO L225 Difference]: With dead ends: 8296 [2021-06-12 15:40:53,881 INFO L226 Difference]: Without dead ends: 8026 [2021-06-12 15:40:53,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1238.5ms TimeCoverageRelationStatistics Valid=2235, Invalid=6695, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:40:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-06-12 15:40:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 6453. [2021-06-12 15:40:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:53,951 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:53,952 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:53,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:53,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:53,957 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:54,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:54,157 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:54,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1602121060, now seen corresponding path program 543 times [2021-06-12 15:40:54,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:54,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558513376] [2021-06-12 15:40:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:54,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:54,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558513376] [2021-06-12 15:40:54,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558513376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:54,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650104180] [2021-06-12 15:40:54,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:54,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:40:54,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:54,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 15:40:54,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:54,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650104180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:54,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:54,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:54,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620081481] [2021-06-12 15:40:54,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:54,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:54,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:54,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:54,828 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:56,223 INFO L93 Difference]: Finished difference Result 8246 states and 21997 transitions. [2021-06-12 15:40:56,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 15:40:56,224 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:56,231 INFO L225 Difference]: With dead ends: 8246 [2021-06-12 15:40:56,232 INFO L226 Difference]: Without dead ends: 7976 [2021-06-12 15:40:56,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1374.5ms TimeCoverageRelationStatistics Valid=2135, Invalid=7177, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 15:40:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2021-06-12 15:40:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 6453. [2021-06-12 15:40:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:56,308 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:56,308 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:56,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:56,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:56,313 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:56,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:56,514 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:56,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1917927210, now seen corresponding path program 544 times [2021-06-12 15:40:56,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:56,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749141944] [2021-06-12 15:40:56,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:56,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:56,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749141944] [2021-06-12 15:40:56,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749141944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:56,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318480585] [2021-06-12 15:40:56,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:56,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:40:56,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:56,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:56,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:57,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318480585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:57,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:57,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:40:57,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578613217] [2021-06-12 15:40:57,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:40:57,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:57,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:40:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:40:57,163 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:40:58,458 INFO L93 Difference]: Finished difference Result 8196 states and 21897 transitions. [2021-06-12 15:40:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 15:40:58,458 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:40:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:40:58,467 INFO L225 Difference]: With dead ends: 8196 [2021-06-12 15:40:58,467 INFO L226 Difference]: Without dead ends: 7926 [2021-06-12 15:40:58,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 1291.4ms TimeCoverageRelationStatistics Valid=2385, Invalid=6927, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 15:40:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-06-12 15:40:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 6453. [2021-06-12 15:40:58,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:40:58,548 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:40:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:40:58,548 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:40:58,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:40:58,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:40:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:40:58,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:40:58,553 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:40:58,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-12 15:40:58,754 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:40:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:40:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1464013850, now seen corresponding path program 545 times [2021-06-12 15:40:58,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:40:58,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720618440] [2021-06-12 15:40:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:40:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:40:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:59,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:40:59,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720618440] [2021-06-12 15:40:59,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720618440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:59,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656618874] [2021-06-12 15:40:59,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:40:59,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:40:59,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:40:59,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:40:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:40:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:40:59,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656618874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:40:59,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:40:59,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:40:59,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932069047] [2021-06-12 15:40:59,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:40:59,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:40:59,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:40:59,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:40:59,466 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:41:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:41:00,979 INFO L93 Difference]: Finished difference Result 8146 states and 21797 transitions. [2021-06-12 15:41:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 15:41:00,979 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:41:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:41:00,988 INFO L225 Difference]: With dead ends: 8146 [2021-06-12 15:41:00,988 INFO L226 Difference]: Without dead ends: 7876 [2021-06-12 15:41:00,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 1494.5ms TimeCoverageRelationStatistics Valid=2425, Invalid=7277, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 15:41:00,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2021-06-12 15:41:01,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6453. [2021-06-12 15:41:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:41:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:41:01,093 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:41:01,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:41:01,093 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:41:01,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:41:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:41:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:41:01,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:41:01,098 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:41:01,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:41:01,299 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:41:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:41:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1952941528, now seen corresponding path program 546 times [2021-06-12 15:41:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:41:01,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442029437] [2021-06-12 15:41:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:41:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:41:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:41:01,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:41:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442029437] [2021-06-12 15:41:01,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442029437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:41:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618080790] [2021-06-12 15:41:01,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:41:01,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:41:01,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:41:01,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 15:41:01,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:41:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:41:02,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618080790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:41:02,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:41:02,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 15:41:02,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324163888] [2021-06-12 15:41:02,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:41:02,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:41:02,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:41:02,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:41:02,002 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:41:03,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:41:03,304 INFO L93 Difference]: Finished difference Result 8096 states and 21697 transitions. [2021-06-12 15:41:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 15:41:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:41:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:41:03,311 INFO L225 Difference]: With dead ends: 8096 [2021-06-12 15:41:03,312 INFO L226 Difference]: Without dead ends: 7826 [2021-06-12 15:41:03,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 1332.3ms TimeCoverageRelationStatistics Valid=2551, Invalid=7151, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 15:41:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-06-12 15:41:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 6453. [2021-06-12 15:41:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:41:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:41:03,391 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:41:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:41:03,391 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:41:03,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:41:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:41:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:41:03,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:41:03,397 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:41:03,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-12 15:41:03,598 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:41:03,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:41:03,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1441970968, now seen corresponding path program 547 times [2021-06-12 15:41:03,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:41:03,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982979903] [2021-06-12 15:41:03,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:41:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:41:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:41:03,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:41:03,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982979903] [2021-06-12 15:41:03,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982979903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:41:03,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724412773] [2021-06-12 15:41:03,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:41:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:41:04,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:41:04,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:41:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:41:04,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724412773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:41:04,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:41:04,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-12 15:41:04,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451069591] [2021-06-12 15:41:04,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:41:04,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:41:04,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:41:04,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:41:04,250 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:41:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:41:05,820 INFO L93 Difference]: Finished difference Result 8046 states and 21597 transitions. [2021-06-12 15:41:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 15:41:05,820 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-12 15:41:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:41:05,828 INFO L225 Difference]: With dead ends: 8046 [2021-06-12 15:41:05,828 INFO L226 Difference]: Without dead ends: 7776 [2021-06-12 15:41:05,829 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 1546.6ms TimeCoverageRelationStatistics Valid=2593, Invalid=7507, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 15:41:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-06-12 15:41:05,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 6453. [2021-06-12 15:41:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:41:05,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-12 15:41:05,906 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-12 15:41:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:41:05,906 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-12 15:41:05,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:41:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-12 15:41:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-12 15:41:05,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:41:05,912 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:41:06,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:41:06,112 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:41:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:41:06,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1012906662, now seen corresponding path program 548 times [2021-06-12 15:41:06,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:41:06,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109913246] [2021-06-12 15:41:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:41:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:41:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:41:06,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:41:06,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109913246] [2021-06-12 15:41:06,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109913246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:41:06,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049000649] [2021-06-12 15:41:06,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:41:06,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:41:06,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:41:06,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:41:06,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-12 15:41:06,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-12 15:41:06,938 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 15:41:06,940 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 15:41:06,941 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 15:41:06,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 03:41:06 BasicIcfg [2021-06-12 15:41:06,941 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 15:41:06,942 INFO L168 Benchmark]: Toolchain (without parser) took 839327.33 ms. Allocated memory was 182.5 MB in the beginning and 952.1 MB in the end (delta: 769.7 MB). Free memory was 146.6 MB in the beginning and 886.4 MB in the end (delta: -739.8 MB). Peak memory consumption was 30.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:41:06,942 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 182.5 MB. Free memory is still 164.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:41:06,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 443.16 ms. Allocated memory is still 182.5 MB. Free memory was 146.4 MB in the beginning and 145.5 MB in the end (delta: 926.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-12 15:41:06,942 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.05 ms. Allocated memory is still 182.5 MB. Free memory was 145.5 MB in the beginning and 143.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:41:06,942 INFO L168 Benchmark]: Boogie Preprocessor took 15.47 ms. Allocated memory is still 182.5 MB. Free memory was 143.7 MB in the beginning and 142.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:41:06,942 INFO L168 Benchmark]: RCFGBuilder took 288.26 ms. Allocated memory is still 182.5 MB. Free memory was 142.3 MB in the beginning and 121.0 MB in the end (delta: 21.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:41:06,942 INFO L168 Benchmark]: TraceAbstraction took 838549.55 ms. Allocated memory was 182.5 MB in the beginning and 952.1 MB in the end (delta: 769.7 MB). Free memory was 120.6 MB in the beginning and 886.4 MB in the end (delta: -765.8 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:41:06,942 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 182.5 MB. Free memory is still 164.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 443.16 ms. Allocated memory is still 182.5 MB. Free memory was 146.4 MB in the beginning and 145.5 MB in the end (delta: 926.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.05 ms. Allocated memory is still 182.5 MB. Free memory was 145.5 MB in the beginning and 143.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.47 ms. Allocated memory is still 182.5 MB. Free memory was 143.7 MB in the beginning and 142.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 288.26 ms. Allocated memory is still 182.5 MB. Free memory was 142.3 MB in the beginning and 121.0 MB in the end (delta: 21.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 838549.55 ms. Allocated memory was 182.5 MB in the beginning and 952.1 MB in the end (delta: 769.7 MB). Free memory was 120.6 MB in the beginning and 886.4 MB in the end (delta: -765.8 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 196 with TraceHistMax 17,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 838459.5ms, OverallIterations: 557, TraceHistogramMax: 17, EmptinessCheckTime: 1893.0ms, AutomataDifference: 424294.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 58.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 53737 SDtfs, 698229 SDslu, 606539 SDs, 0 SdLazy, 112609 SolverSat, 118025 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68365.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112755 GetRequests, 77710 SyntacticMatches, 0 SemanticMatches, 35045 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605037 ImplicationChecksByTransitivity, 432169.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6453occurred in iteration=532, InterpolantAutomatonStates: 24382, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28483.3ms AutomataMinimizationTime, 556 MinimizatonAttempts, 687234 StatesRemovedByMinimization, 556 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6493.8ms SsaConstructionTime, 18361.8ms SatisfiabilityAnalysisTime, 228471.7ms InterpolantComputationTime, 155678 NumberOfCodeBlocks, 155678 NumberOfCodeBlocksAsserted, 4282 NumberOfCheckSat, 154572 ConstructedInterpolants, 0 QuantifiedInterpolants, 682814 SizeOfPredicates, 12810 NumberOfNonLiveVariables, 150760 ConjunctsInSsa, 16403 ConjunctsInUnsatCore, 1106 InterpolantComputations, 6 PerfectInterpolantSequences, 1/636180 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown