/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 15:26:51,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 15:26:51,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 15:26:51,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 15:26:51,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 15:26:51,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 15:26:51,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 15:26:51,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 15:26:51,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 15:26:51,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 15:26:51,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 15:26:51,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-12 15:26:51,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 15:26:51,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 15:26:51,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 15:26:51,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 15:26:51,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 15:26:51,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 15:26:51,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 15:26:51,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 15:26:51,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 15:26:51,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 15:26:51,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 15:26:51,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 15:26:51,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-12 15:26:51,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 15:26:51,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 15:26:51,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 15:26:51,592 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 15:26:51,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 15:26:51,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 15:26:51,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 15:26:51,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 15:26:51,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 15:26:51,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 15:26:51,630 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 15:26:51,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 15:26:51,630 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 15:26:51,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 15:26:51,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 15:26:51,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 15:26:51,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 15:26:51,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 15:26:51,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 15:26:51,631 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 15:26:51,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 15:26:51,631 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 15:26:51,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 15:26:51,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 15:26:51,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 15:26:51,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 15:26:51,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 15:26:51,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:26:51,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 15:26:51,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 15:26:51,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 15:26:51,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 15:26:51,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 15:26:51,632 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 15:26:51,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 15:26:51,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 15:26:51,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 15:26:51,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 15:26:51,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 15:26:51,922 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-12 15:26:51,923 INFO L275 PluginConnector]: CDTParser initialized [2021-06-12 15:26:51,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-06-12 15:26:51,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a057f61e7/e811621bf01a4cfb8f7e4d998d6e43dc/FLAGa4a6afdf7 [2021-06-12 15:26:52,488 INFO L306 CDTParser]: Found 1 translation units. [2021-06-12 15:26:52,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-06-12 15:26:52,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a057f61e7/e811621bf01a4cfb8f7e4d998d6e43dc/FLAGa4a6afdf7 [2021-06-12 15:26:52,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a057f61e7/e811621bf01a4cfb8f7e4d998d6e43dc [2021-06-12 15:26:52,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 15:26:52,983 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-12 15:26:52,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-12 15:26:52,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-12 15:26:52,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-12 15:26:52,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:26:52" (1/1) ... [2021-06-12 15:26:52,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e8b6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:52, skipping insertion in model container [2021-06-12 15:26:52,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:26:52" (1/1) ... [2021-06-12 15:26:52,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-12 15:26:53,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-12 15:26:53,280 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-1.i[30962,30975] [2021-06-12 15:26:53,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:26:53,288 INFO L203 MainTranslator]: Completed pre-run [2021-06-12 15:26:53,317 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-1.i[30962,30975] [2021-06-12 15:26:53,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:26:53,373 INFO L208 MainTranslator]: Completed translation [2021-06-12 15:26:53,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53 WrapperNode [2021-06-12 15:26:53,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-12 15:26:53,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 15:26:53,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 15:26:53,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 15:26:53,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (1/1) ... [2021-06-12 15:26:53,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (1/1) ... [2021-06-12 15:26:53,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 15:26:53,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 15:26:53,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 15:26:53,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 15:26:53,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (1/1) ... [2021-06-12 15:26:53,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (1/1) ... [2021-06-12 15:26:53,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (1/1) ... [2021-06-12 15:26:53,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (1/1) ... [2021-06-12 15:26:53,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (1/1) ... [2021-06-12 15:26:53,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (1/1) ... [2021-06-12 15:26:53,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (1/1) ... [2021-06-12 15:26:53,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 15:26:53,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 15:26:53,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 15:26:53,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 15:26:53,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (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 15:26:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-12 15:26:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-12 15:26:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-12 15:26:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-12 15:26:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-12 15:26:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-12 15:26:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-12 15:26:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-12 15:26:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-12 15:26:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-12 15:26:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 15:26:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 15:26:53,509 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 15:26:53,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 15:26:53,921 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-12 15:26:53,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:26:53 BoogieIcfgContainer [2021-06-12 15:26:53,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 15:26:53,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 15:26:53,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 15:26:53,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 15:26:53,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.06 03:26:52" (1/3) ... [2021-06-12 15:26:53,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1345fccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:26:53, skipping insertion in model container [2021-06-12 15:26:53,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:26:53" (2/3) ... [2021-06-12 15:26:53,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1345fccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:26:53, skipping insertion in model container [2021-06-12 15:26:53,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:26:53" (3/3) ... [2021-06-12 15:26:53,931 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2021-06-12 15:26:53,937 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 15:26:53,937 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 15:26:53,937 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 15:26:53,938 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 15:26:53,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,971 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,971 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,972 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,972 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,973 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,973 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,976 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,977 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,978 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,978 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,978 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,981 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,982 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,982 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,982 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,984 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,984 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,986 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,986 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,986 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,986 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,987 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,987 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,992 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,993 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,993 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,993 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,993 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,993 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:26:53,995 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-12 15:26:54,013 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 15:26:54,039 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:26:54,039 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:26:54,040 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:26:54,040 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:26:54,040 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:26:54,040 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:26:54,040 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:26:54,040 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 15:26:54,050 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-12 15:26:54,151 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 15:26:54,158 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 15:26:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 15:26:54,175 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:54,176 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 15:26:54,176 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:54,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:54,181 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-12 15:26:54,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:54,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049902938] [2021-06-12 15:26:54,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:54,503 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 15:26:54,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:54,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049902938] [2021-06-12 15:26:54,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049902938] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:26:54,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:26:54,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:26:54,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61809730] [2021-06-12 15:26:54,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:26:54,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:26:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:26:54,525 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 15:26:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:54,780 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-12 15:26:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 15:26:54,787 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 15:26:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:54,813 INFO L225 Difference]: With dead ends: 3294 [2021-06-12 15:26:54,814 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 15:26:54,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:26:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 15:26:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-12 15:26:54,939 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 15:26:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-12 15:26:54,943 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-12 15:26:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:54,944 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-12 15:26:54,944 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 15:26:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-12 15:26:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 15:26:54,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:54,947 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 15:26:54,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 15:26:54,947 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:54,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-12 15:26:54,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:54,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075887785] [2021-06-12 15:26:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:55,040 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 15:26:55,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:55,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075887785] [2021-06-12 15:26:55,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075887785] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:26:55,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:26:55,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:26:55,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277675290] [2021-06-12 15:26:55,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:26:55,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:55,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:26:55,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:26:55,043 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 15:26:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:55,157 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-12 15:26:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 15:26:55,158 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 15:26:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:55,164 INFO L225 Difference]: With dead ends: 1302 [2021-06-12 15:26:55,164 INFO L226 Difference]: Without dead ends: 920 [2021-06-12 15:26:55,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:26:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-12 15:26:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-12 15:26:55,194 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 15:26:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-12 15:26:55,197 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-12 15:26:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:55,198 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-12 15:26:55,198 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 15:26:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-12 15:26:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:26:55,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:55,200 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 15:26:55,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 15:26:55,201 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:55,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:55,208 INFO L82 PathProgramCache]: Analyzing trace with hash 93608864, now seen corresponding path program 1 times [2021-06-12 15:26:55,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:55,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965248826] [2021-06-12 15:26:55,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:55,348 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 15:26:55,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:55,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965248826] [2021-06-12 15:26:55,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965248826] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:26:55,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:26:55,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:26:55,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441030102] [2021-06-12 15:26:55,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:26:55,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:26:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:26:55,353 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 15:26:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:55,546 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-12 15:26:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 15:26:55,547 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 15:26:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:55,552 INFO L225 Difference]: With dead ends: 1304 [2021-06-12 15:26:55,552 INFO L226 Difference]: Without dead ends: 1044 [2021-06-12 15:26:55,552 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-12 15:26:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-12 15:26:55,572 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 15:26:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-12 15:26:55,576 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-12 15:26:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:55,577 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-12 15:26:55,577 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 15:26:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-12 15:26:55,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:26:55,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:55,580 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 15:26:55,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 15:26:55,580 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:55,582 INFO L82 PathProgramCache]: Analyzing trace with hash -466628886, now seen corresponding path program 2 times [2021-06-12 15:26:55,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:55,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863980484] [2021-06-12 15:26:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:55,750 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 15:26:55,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:55,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863980484] [2021-06-12 15:26:55,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863980484] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:26:55,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:26:55,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:26:55,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313297302] [2021-06-12 15:26:55,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:26:55,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:55,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:26:55,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:26:55,756 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 15:26:55,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:55,877 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-12 15:26:55,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:26:55,878 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 15:26:55,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:55,888 INFO L225 Difference]: With dead ends: 1772 [2021-06-12 15:26:55,888 INFO L226 Difference]: Without dead ends: 1505 [2021-06-12 15:26:55,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:26:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-12 15:26:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-12 15:26:55,921 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 15:26:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-12 15:26:55,924 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-12 15:26:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:55,926 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-12 15:26:55,926 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 15:26:55,927 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-12 15:26:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:26:55,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:55,928 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 15:26:55,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 15:26:55,928 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash -78750066, now seen corresponding path program 3 times [2021-06-12 15:26:55,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:55,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64133599] [2021-06-12 15:26:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:56,013 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 15:26:56,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:56,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64133599] [2021-06-12 15:26:56,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64133599] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:26:56,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:26:56,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:26:56,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838890078] [2021-06-12 15:26:56,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:26:56,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:26:56,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:26:56,016 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 15:26:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:56,140 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-12 15:26:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:26:56,140 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 15:26:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:56,149 INFO L225 Difference]: With dead ends: 2211 [2021-06-12 15:26:56,149 INFO L226 Difference]: Without dead ends: 1944 [2021-06-12 15:26:56,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:26:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-12 15:26:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-12 15:26:56,183 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 15:26:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-12 15:26:56,187 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-12 15:26:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:56,187 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-12 15:26:56,187 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 15:26:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-12 15:26:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:26:56,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:56,189 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 15:26:56,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 15:26:56,189 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash -56406816, now seen corresponding path program 4 times [2021-06-12 15:26:56,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:56,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801871404] [2021-06-12 15:26:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:56,288 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 15:26:56,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:56,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801871404] [2021-06-12 15:26:56,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801871404] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:26:56,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:26:56,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:26:56,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409987983] [2021-06-12 15:26:56,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:26:56,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:56,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:26:56,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:26:56,292 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 15:26:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:56,444 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-06-12 15:26:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 15:26:56,445 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 15:26:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:56,452 INFO L225 Difference]: With dead ends: 1671 [2021-06-12 15:26:56,452 INFO L226 Difference]: Without dead ends: 1173 [2021-06-12 15:26:56,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-12 15:26:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-06-12 15:26:56,481 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 15:26:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-06-12 15:26:56,484 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-06-12 15:26:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:56,484 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-06-12 15:26:56,487 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 15:26:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-06-12 15:26:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:26:56,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:56,489 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 15:26:56,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 15:26:56,490 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:56,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:56,490 INFO L82 PathProgramCache]: Analyzing trace with hash -709715269, now seen corresponding path program 1 times [2021-06-12 15:26:56,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:56,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615454792] [2021-06-12 15:26:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:56,621 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 15:26:56,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:56,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615454792] [2021-06-12 15:26:56,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615454792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:56,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704755847] [2021-06-12 15:26:56,622 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 15:26:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:56,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:26:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:56,918 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 15:26:56,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704755847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:56,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:56,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:26:56,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664366059] [2021-06-12 15:26:56,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:26:56,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:56,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:26:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:26:56,920 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 15:26:57,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:57,086 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-06-12 15:26:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 15:26:57,087 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 15:26:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:57,093 INFO L225 Difference]: With dead ends: 1526 [2021-06-12 15:26:57,093 INFO L226 Difference]: Without dead ends: 1256 [2021-06-12 15:26:57,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-12 15:26:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-06-12 15:26:57,123 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 15:26:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-06-12 15:26:57,126 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-06-12 15:26:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:57,127 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-06-12 15:26:57,127 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 15:26:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-06-12 15:26:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:26:57,129 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:57,129 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 15:26:57,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 15:26:57,358 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash -321836449, now seen corresponding path program 2 times [2021-06-12 15:26:57,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:57,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679608160] [2021-06-12 15:26:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:57,429 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 15:26:57,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:57,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679608160] [2021-06-12 15:26:57,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679608160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:57,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676899818] [2021-06-12 15:26:57,429 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 15:26:57,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:57,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:26:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:57,620 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 15:26:57,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676899818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:57,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:57,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 15:26:57,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842052806] [2021-06-12 15:26:57,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:26:57,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:57,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:26:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:26:57,622 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 15:26:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:57,779 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-06-12 15:26:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:26:57,779 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 15:26:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:57,788 INFO L225 Difference]: With dead ends: 2408 [2021-06-12 15:26:57,789 INFO L226 Difference]: Without dead ends: 2138 [2021-06-12 15:26:57,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-12 15:26:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-06-12 15:26:57,825 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 15:26:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-06-12 15:26:57,829 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-06-12 15:26:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:57,829 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-06-12 15:26:57,830 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 15:26:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-06-12 15:26:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:26:57,831 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:57,831 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 15:26:58,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:58,054 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:58,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:58,055 INFO L82 PathProgramCache]: Analyzing trace with hash -299493199, now seen corresponding path program 3 times [2021-06-12 15:26:58,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:58,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631416613] [2021-06-12 15:26:58,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:58,117 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 15:26:58,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:58,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631416613] [2021-06-12 15:26:58,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631416613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:58,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851817998] [2021-06-12 15:26:58,117 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 15:26:58,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 15:26:58,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:58,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:26:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:58,288 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 15:26:58,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851817998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:58,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:58,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:26:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914328569] [2021-06-12 15:26:58,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:26:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:26:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:26:58,290 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 15:26:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:58,550 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-06-12 15:26:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:26:58,551 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 15:26:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:58,557 INFO L225 Difference]: With dead ends: 2196 [2021-06-12 15:26:58,557 INFO L226 Difference]: Without dead ends: 1621 [2021-06-12 15:26:58,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:26:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-12 15:26:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-06-12 15:26:58,600 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 15:26:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-06-12 15:26:58,604 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-06-12 15:26:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:58,604 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-06-12 15:26:58,604 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 15:26:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-06-12 15:26:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:26:58,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:58,606 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 15:26:58,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:58,820 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:58,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1925374875, now seen corresponding path program 1 times [2021-06-12 15:26:58,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:58,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419531502] [2021-06-12 15:26:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:58,926 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 15:26:58,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419531502] [2021-06-12 15:26:58,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419531502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37008630] [2021-06-12 15:26:58,927 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 15:26:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:59,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:26:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:59,138 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 15:26:59,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37008630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:59,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:59,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:26:59,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243742741] [2021-06-12 15:26:59,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:26:59,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:59,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:26:59,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:26:59,141 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 15:26:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:59,335 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-06-12 15:26:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:26:59,336 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 15:26:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:59,343 INFO L225 Difference]: With dead ends: 2068 [2021-06-12 15:26:59,343 INFO L226 Difference]: Without dead ends: 1734 [2021-06-12 15:26:59,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:26:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-12 15:26:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-06-12 15:26:59,371 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 15:26:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-06-12 15:26:59,374 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-06-12 15:26:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:59,374 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-06-12 15:26:59,374 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 15:26:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-06-12 15:26:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:26:59,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:59,376 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 15:26:59,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:59,593 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash -558025153, now seen corresponding path program 2 times [2021-06-12 15:26:59,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:59,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501979332] [2021-06-12 15:26:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:59,682 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 15:26:59,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:59,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501979332] [2021-06-12 15:26:59,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501979332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:59,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268865177] [2021-06-12 15:26:59,682 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 15:26:59,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:59,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:26:59,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:59,879 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 15:26:59,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268865177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:59,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:59,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 15:26:59,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664871417] [2021-06-12 15:26:59,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:26:59,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:59,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:26:59,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:26:59,882 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 15:27:00,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:00,008 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-06-12 15:27:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 15:27:00,009 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 15:27:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:00,015 INFO L225 Difference]: With dead ends: 2061 [2021-06-12 15:27:00,015 INFO L226 Difference]: Without dead ends: 1791 [2021-06-12 15:27:00,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-12 15:27:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-06-12 15:27:00,042 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 15:27:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-06-12 15:27:00,045 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-06-12 15:27:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:00,045 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-06-12 15:27:00,045 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 15:27:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-06-12 15:27:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:27:00,047 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:00,047 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 15:27:00,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 15:27:00,261 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:00,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:00,261 INFO L82 PathProgramCache]: Analyzing trace with hash -128271569, now seen corresponding path program 3 times [2021-06-12 15:27:00,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:00,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798592739] [2021-06-12 15:27:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:00,333 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 15:27:00,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:00,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798592739] [2021-06-12 15:27:00,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798592739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:00,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479646672] [2021-06-12 15:27:00,334 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 15:27:00,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:27:00,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:00,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:27:00,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:00,538 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 15:27:00,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479646672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:00,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:00,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 15:27:00,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740835045] [2021-06-12 15:27:00,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:27:00,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:00,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:27:00,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:27:00,540 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 15:27:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:00,737 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-06-12 15:27:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:27:00,737 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 15:27:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:00,742 INFO L225 Difference]: With dead ends: 2006 [2021-06-12 15:27:00,742 INFO L226 Difference]: Without dead ends: 1736 [2021-06-12 15:27:00,742 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:00,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-12 15:27:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-06-12 15:27:00,770 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 15:27:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-06-12 15:27:00,774 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-06-12 15:27:00,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:00,774 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-06-12 15:27:00,774 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 15:27:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-06-12 15:27:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:27:00,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:00,777 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 15:27:00,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:01,000 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:01,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:01,000 INFO L82 PathProgramCache]: Analyzing trace with hash -186005699, now seen corresponding path program 4 times [2021-06-12 15:27:01,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:01,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710613871] [2021-06-12 15:27:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:01,068 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 15:27:01,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:01,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710613871] [2021-06-12 15:27:01,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710613871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:01,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518337968] [2021-06-12 15:27:01,068 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 15:27:01,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:01,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:27:01,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:01,252 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 15:27:01,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518337968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:01,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:01,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 15:27:01,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396518411] [2021-06-12 15:27:01,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:27:01,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:01,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:27:01,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:27:01,255 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 15:27:01,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:01,419 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-06-12 15:27:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 15:27:01,420 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 15:27:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:01,425 INFO L225 Difference]: With dead ends: 2798 [2021-06-12 15:27:01,425 INFO L226 Difference]: Without dead ends: 2528 [2021-06-12 15:27:01,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:01,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-12 15:27:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-06-12 15:27:01,457 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 15:27:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-06-12 15:27:01,460 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-06-12 15:27:01,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:01,460 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-06-12 15:27:01,461 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 15:27:01,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-06-12 15:27:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:27:01,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:01,463 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 15:27:01,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:01,694 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:01,694 INFO L82 PathProgramCache]: Analyzing trace with hash -163662449, now seen corresponding path program 5 times [2021-06-12 15:27:01,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:01,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57690227] [2021-06-12 15:27:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:01,774 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 15:27:01,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:01,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57690227] [2021-06-12 15:27:01,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57690227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:01,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914043507] [2021-06-12 15:27:01,774 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 15:27:01,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 15:27:01,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:01,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:27:01,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:01,949 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 15:27:01,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914043507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:01,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:01,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 15:27:01,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606176102] [2021-06-12 15:27:01,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:27:01,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:01,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:27:01,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:27:01,950 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 15:27:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:02,206 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-06-12 15:27:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:27:02,206 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 15:27:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:02,210 INFO L225 Difference]: With dead ends: 2285 [2021-06-12 15:27:02,210 INFO L226 Difference]: Without dead ends: 1706 [2021-06-12 15:27:02,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-06-12 15:27:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-06-12 15:27:02,234 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 15:27:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-06-12 15:27:02,237 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-06-12 15:27:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:02,237 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-06-12 15:27:02,237 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 15:27:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-06-12 15:27:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:27:02,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:02,239 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 15:27:02,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 15:27:02,462 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:02,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1043607760, now seen corresponding path program 6 times [2021-06-12 15:27:02,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:02,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482502983] [2021-06-12 15:27:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:02,549 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 15:27:02,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:02,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482502983] [2021-06-12 15:27:02,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482502983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:02,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87656112] [2021-06-12 15:27:02,550 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 15:27:02,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 15:27:02,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:02,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:27:02,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:02,736 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 15:27:02,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87656112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:02,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:02,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:27:02,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822458427] [2021-06-12 15:27:02,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:27:02,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:02,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:27:02,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:27:02,738 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 15:27:02,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:02,894 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-06-12 15:27:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:27:02,894 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 15:27:02,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:02,897 INFO L225 Difference]: With dead ends: 1931 [2021-06-12 15:27:02,897 INFO L226 Difference]: Without dead ends: 1661 [2021-06-12 15:27:02,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-12 15:27:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-06-12 15:27:02,919 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 15:27:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-06-12 15:27:02,922 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-06-12 15:27:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:02,922 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-06-12 15:27:02,922 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 15:27:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-06-12 15:27:02,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:27:02,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:02,924 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 15:27:03,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 15:27:03,141 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:03,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1473361344, now seen corresponding path program 7 times [2021-06-12 15:27:03,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:03,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498165715] [2021-06-12 15:27:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:03,248 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 15:27:03,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:03,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498165715] [2021-06-12 15:27:03,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498165715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:03,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348246821] [2021-06-12 15:27:03,249 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 15:27:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:27:03,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:03,442 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 15:27:03,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348246821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:03,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:03,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:27:03,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597051392] [2021-06-12 15:27:03,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:27:03,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:03,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:27:03,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:03,444 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 15:27:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:03,679 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-06-12 15:27:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:27:03,679 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 15:27:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:03,682 INFO L225 Difference]: With dead ends: 2111 [2021-06-12 15:27:03,682 INFO L226 Difference]: Without dead ends: 1841 [2021-06-12 15:27:03,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:27:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-12 15:27:03,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-06-12 15:27:03,707 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 15:27:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-06-12 15:27:03,710 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-06-12 15:27:03,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:03,710 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-06-12 15:27:03,710 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 15:27:03,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-06-12 15:27:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:27:03,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:03,712 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 15:27:03,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 15:27:03,929 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:03,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1415627214, now seen corresponding path program 8 times [2021-06-12 15:27:03,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:03,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497450594] [2021-06-12 15:27:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:04,004 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 15:27:04,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497450594] [2021-06-12 15:27:04,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497450594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724390076] [2021-06-12 15:27:04,004 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 15:27:04,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:04,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:04,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:27:04,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:04,164 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 15:27:04,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724390076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:04,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:04,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:27:04,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906844972] [2021-06-12 15:27:04,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:27:04,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:04,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:27:04,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:27:04,165 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 15:27:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:04,395 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-06-12 15:27:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:27:04,396 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 15:27:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:04,400 INFO L225 Difference]: With dead ends: 2858 [2021-06-12 15:27:04,400 INFO L226 Difference]: Without dead ends: 2588 [2021-06-12 15:27:04,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:27:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-12 15:27:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-06-12 15:27:04,431 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 15:27:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-06-12 15:27:04,434 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-06-12 15:27:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:04,434 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-06-12 15:27:04,435 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 15:27:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-06-12 15:27:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:27:04,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:04,437 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 15:27:04,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 15:27:04,660 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:04,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1437970464, now seen corresponding path program 9 times [2021-06-12 15:27:04,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:04,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087217032] [2021-06-12 15:27:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:04,728 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 15:27:04,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:04,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087217032] [2021-06-12 15:27:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087217032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:04,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223227080] [2021-06-12 15:27:04,729 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 15:27:04,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:27:04,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:04,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:27:04,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:04,898 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 15:27:04,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223227080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:04,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:04,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:27:04,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828501676] [2021-06-12 15:27:04,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:27:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:04,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:27:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:04,899 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 15:27:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:05,230 INFO L93 Difference]: Finished difference Result 2726 states and 7296 transitions. [2021-06-12 15:27:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:05,231 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 15:27:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:05,235 INFO L225 Difference]: With dead ends: 2726 [2021-06-12 15:27:05,235 INFO L226 Difference]: Without dead ends: 2151 [2021-06-12 15:27:05,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:27:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-12 15:27:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1678. [2021-06-12 15:27:05,261 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 15:27:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4683 transitions. [2021-06-12 15:27:05,264 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4683 transitions. Word has length 55 [2021-06-12 15:27:05,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:05,285 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4683 transitions. [2021-06-12 15:27:05,286 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 15:27:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4683 transitions. [2021-06-12 15:27:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:05,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:05,288 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 15:27:05,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 15:27:05,501 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:05,501 INFO L82 PathProgramCache]: Analyzing trace with hash -173240564, now seen corresponding path program 10 times [2021-06-12 15:27:05,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:05,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208669863] [2021-06-12 15:27:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:05,606 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 15:27:05,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:05,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208669863] [2021-06-12 15:27:05,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208669863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:05,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185934571] [2021-06-12 15:27:05,607 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 15:27:05,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:05,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:05,811 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 15:27:05,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185934571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:05,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:05,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:27:05,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107250039] [2021-06-12 15:27:05,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:05,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:05,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:05,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:05,813 INFO L87 Difference]: Start difference. First operand 1678 states and 4683 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 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 15:27:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:06,034 INFO L93 Difference]: Finished difference Result 2468 states and 6583 transitions. [2021-06-12 15:27:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:27:06,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 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 60 [2021-06-12 15:27:06,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:06,039 INFO L225 Difference]: With dead ends: 2468 [2021-06-12 15:27:06,039 INFO L226 Difference]: Without dead ends: 2134 [2021-06-12 15:27:06,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:27:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-06-12 15:27:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1763. [2021-06-12 15:27:06,072 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 15:27:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4853 transitions. [2021-06-12 15:27:06,075 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4853 transitions. Word has length 60 [2021-06-12 15:27:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:06,075 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4853 transitions. [2021-06-12 15:27:06,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 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 15:27:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4853 transitions. [2021-06-12 15:27:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:06,078 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:06,078 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 15:27:06,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:06,293 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash -722803536, now seen corresponding path program 11 times [2021-06-12 15:27:06,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:06,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256238138] [2021-06-12 15:27:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:06,384 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 15:27:06,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:06,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256238138] [2021-06-12 15:27:06,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256238138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:06,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301851149] [2021-06-12 15:27:06,385 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 15:27:06,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:27:06,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:06,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:06,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:06,579 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 15:27:06,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301851149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:06,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:06,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 15:27:06,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491705859] [2021-06-12 15:27:06,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:27:06,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:06,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:27:06,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:27:06,580 INFO L87 Difference]: Start difference. First operand 1763 states and 4853 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:06,753 INFO L93 Difference]: Finished difference Result 2561 states and 6577 transitions. [2021-06-12 15:27:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:27:06,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 15:27:06,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:06,758 INFO L225 Difference]: With dead ends: 2561 [2021-06-12 15:27:06,759 INFO L226 Difference]: Without dead ends: 2291 [2021-06-12 15:27:06,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:06,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-06-12 15:27:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1778. [2021-06-12 15:27:06,787 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 15:27:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-12 15:27:06,790 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-12 15:27:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:06,790 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-12 15:27:06,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-12 15:27:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:06,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:06,793 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 15:27:07,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:07,009 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:07,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:07,009 INFO L82 PathProgramCache]: Analyzing trace with hash -790954592, now seen corresponding path program 12 times [2021-06-12 15:27:07,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:07,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363071719] [2021-06-12 15:27:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:07,110 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 15:27:07,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:07,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363071719] [2021-06-12 15:27:07,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363071719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:07,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590459024] [2021-06-12 15:27:07,111 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 15:27:07,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:27:07,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:07,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:07,294 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 15:27:07,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590459024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:07,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:07,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:27:07,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690864320] [2021-06-12 15:27:07,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:27:07,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:27:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:07,296 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 15:27:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:07,520 INFO L93 Difference]: Finished difference Result 2446 states and 6347 transitions. [2021-06-12 15:27:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:27:07,520 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 15:27:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:07,525 INFO L225 Difference]: With dead ends: 2446 [2021-06-12 15:27:07,525 INFO L226 Difference]: Without dead ends: 2176 [2021-06-12 15:27:07,525 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:27:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-12 15:27:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1778. [2021-06-12 15:27:07,548 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 15:27:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-12 15:27:07,551 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-12 15:27:07,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:07,551 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-12 15:27:07,551 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 15:27:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-12 15:27:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:07,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:07,554 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 15:27:07,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 15:27:07,769 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:07,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2087923666, now seen corresponding path program 13 times [2021-06-12 15:27:07,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:07,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440604287] [2021-06-12 15:27:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:07,877 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 15:27:07,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:07,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440604287] [2021-06-12 15:27:07,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440604287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:07,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831645069] [2021-06-12 15:27:07,877 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 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 15:27:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:07,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:07,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:08,044 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 15:27:08,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831645069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:08,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:08,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 15:27:08,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245250343] [2021-06-12 15:27:08,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:27:08,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:08,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:27:08,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:27:08,046 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:08,223 INFO L93 Difference]: Finished difference Result 2421 states and 6297 transitions. [2021-06-12 15:27:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:27:08,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 15:27:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:08,228 INFO L225 Difference]: With dead ends: 2421 [2021-06-12 15:27:08,228 INFO L226 Difference]: Without dead ends: 2151 [2021-06-12 15:27:08,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-12 15:27:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1778. [2021-06-12 15:27:08,253 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 15:27:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-12 15:27:08,256 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-12 15:27:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:08,256 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-12 15:27:08,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-12 15:27:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:08,259 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:08,259 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 15:27:08,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:08,481 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:08,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1658170082, now seen corresponding path program 14 times [2021-06-12 15:27:08,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:08,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084316771] [2021-06-12 15:27:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:08,574 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 15:27:08,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:08,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084316771] [2021-06-12 15:27:08,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084316771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:08,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955396990] [2021-06-12 15:27:08,574 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 15:27:08,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:08,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:08,751 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 15:27:08,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955396990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:08,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:08,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:27:08,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149026840] [2021-06-12 15:27:08,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:27:08,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:27:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:27:08,753 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 15:27:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:09,051 INFO L93 Difference]: Finished difference Result 2431 states and 6347 transitions. [2021-06-12 15:27:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:09,052 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 15:27:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:09,056 INFO L225 Difference]: With dead ends: 2431 [2021-06-12 15:27:09,056 INFO L226 Difference]: Without dead ends: 2161 [2021-06-12 15:27:09,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:27:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-12 15:27:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1778. [2021-06-12 15:27:09,079 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 15:27:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4888 transitions. [2021-06-12 15:27:09,082 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4888 transitions. Word has length 60 [2021-06-12 15:27:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:09,082 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4888 transitions. [2021-06-12 15:27:09,082 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 15:27:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4888 transitions. [2021-06-12 15:27:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:09,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:09,085 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 15:27:09,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 15:27:09,308 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:09,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1715904212, now seen corresponding path program 15 times [2021-06-12 15:27:09,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:09,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250349548] [2021-06-12 15:27:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:09,392 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 15:27:09,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250349548] [2021-06-12 15:27:09,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250349548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371499783] [2021-06-12 15:27:09,393 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 15:27:09,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:27:09,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:09,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:09,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:09,563 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 15:27:09,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371499783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:09,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:09,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 15:27:09,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878933267] [2021-06-12 15:27:09,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:27:09,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:09,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:27:09,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:27:09,565 INFO L87 Difference]: Start difference. First operand 1778 states and 4888 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:09,789 INFO L93 Difference]: Finished difference Result 3198 states and 8521 transitions. [2021-06-12 15:27:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:27:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 15:27:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:09,793 INFO L225 Difference]: With dead ends: 3198 [2021-06-12 15:27:09,793 INFO L226 Difference]: Without dead ends: 2928 [2021-06-12 15:27:09,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:27:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-06-12 15:27:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 1958. [2021-06-12 15:27:09,826 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 15:27:09,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5447 transitions. [2021-06-12 15:27:09,830 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5447 transitions. Word has length 60 [2021-06-12 15:27:09,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:09,830 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 5447 transitions. [2021-06-12 15:27:09,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:09,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5447 transitions. [2021-06-12 15:27:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:27:09,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:09,834 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 15:27:10,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 15:27:10,051 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:10,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1693560962, now seen corresponding path program 16 times [2021-06-12 15:27:10,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:10,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696968212] [2021-06-12 15:27:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:10,126 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 15:27:10,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:10,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696968212] [2021-06-12 15:27:10,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696968212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:10,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757550463] [2021-06-12 15:27:10,127 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 15:27:10,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:10,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:27:10,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:10,314 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 15:27:10,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757550463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:10,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:10,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 15:27:10,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456294239] [2021-06-12 15:27:10,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:27:10,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:10,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:27:10,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:27:10,316 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 15:27:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:10,725 INFO L93 Difference]: Finished difference Result 3021 states and 8021 transitions. [2021-06-12 15:27:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:27:10,725 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 15:27:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:10,728 INFO L225 Difference]: With dead ends: 3021 [2021-06-12 15:27:10,728 INFO L226 Difference]: Without dead ends: 2446 [2021-06-12 15:27:10,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 348.5ms TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:27:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-12 15:27:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1603. [2021-06-12 15:27:10,753 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 15:27:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4368 transitions. [2021-06-12 15:27:10,756 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4368 transitions. Word has length 60 [2021-06-12 15:27:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:10,756 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 4368 transitions. [2021-06-12 15:27:10,756 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 15:27:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4368 transitions. [2021-06-12 15:27:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:10,759 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:10,759 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 15:27:10,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 15:27:10,973 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2063950335, now seen corresponding path program 17 times [2021-06-12 15:27:10,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:10,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813739061] [2021-06-12 15:27:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:11,098 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 15:27:11,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:11,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813739061] [2021-06-12 15:27:11,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813739061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:11,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168922589] [2021-06-12 15:27:11,099 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 15:27:11,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:27:11,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:11,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:11,287 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 15:27:11,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168922589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:11,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:11,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:27:11,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619154118] [2021-06-12 15:27:11,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:27:11,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:11,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:27:11,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:27:11,290 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 15:27:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:11,505 INFO L93 Difference]: Finished difference Result 2321 states and 6007 transitions. [2021-06-12 15:27:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:27:11,505 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 15:27:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:11,507 INFO L225 Difference]: With dead ends: 2321 [2021-06-12 15:27:11,507 INFO L226 Difference]: Without dead ends: 2051 [2021-06-12 15:27:11,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:27:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-12 15:27:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1678. [2021-06-12 15:27:11,534 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 15:27:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4593 transitions. [2021-06-12 15:27:11,537 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4593 transitions. Word has length 65 [2021-06-12 15:27:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:11,537 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4593 transitions. [2021-06-12 15:27:11,537 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 15:27:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4593 transitions. [2021-06-12 15:27:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:11,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:11,539 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 15:27:11,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 15:27:11,757 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:11,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:11,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2132101391, now seen corresponding path program 18 times [2021-06-12 15:27:11,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:11,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733070816] [2021-06-12 15:27:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:11,890 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 15:27:11,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:11,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733070816] [2021-06-12 15:27:11,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733070816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:11,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364375033] [2021-06-12 15:27:11,890 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 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 15:27:11,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:27:11,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:11,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:11,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:12,107 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 15:27:12,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364375033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:12,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:12,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:27:12,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365389110] [2021-06-12 15:27:12,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:12,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:12,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:12,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:12,109 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 15:27:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:12,349 INFO L93 Difference]: Finished difference Result 2491 states and 6422 transitions. [2021-06-12 15:27:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:12,350 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 15:27:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:12,352 INFO L225 Difference]: With dead ends: 2491 [2021-06-12 15:27:12,352 INFO L226 Difference]: Without dead ends: 2221 [2021-06-12 15:27:12,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:27:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-06-12 15:27:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1753. [2021-06-12 15:27:12,379 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 15:27:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4818 transitions. [2021-06-12 15:27:12,381 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4818 transitions. Word has length 65 [2021-06-12 15:27:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:12,381 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4818 transitions. [2021-06-12 15:27:12,381 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 15:27:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4818 transitions. [2021-06-12 15:27:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:12,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:12,384 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 15:27:12,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 15:27:12,592 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:12,593 INFO L82 PathProgramCache]: Analyzing trace with hash 865896831, now seen corresponding path program 19 times [2021-06-12 15:27:12,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:12,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35748791] [2021-06-12 15:27:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:12,689 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 15:27:12,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35748791] [2021-06-12 15:27:12,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35748791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:12,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415029060] [2021-06-12 15:27:12,690 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 15:27:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:12,856 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 15:27:12,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415029060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:12,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:12,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:27:12,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656325495] [2021-06-12 15:27:12,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:27:12,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:27:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:27:12,858 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 15:27:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:13,090 INFO L93 Difference]: Finished difference Result 2566 states and 6677 transitions. [2021-06-12 15:27:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:27:13,090 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 15:27:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:13,095 INFO L225 Difference]: With dead ends: 2566 [2021-06-12 15:27:13,095 INFO L226 Difference]: Without dead ends: 2296 [2021-06-12 15:27:13,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:27:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-12 15:27:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1828. [2021-06-12 15:27:13,136 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 15:27:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 5058 transitions. [2021-06-12 15:27:13,140 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 5058 transitions. Word has length 65 [2021-06-12 15:27:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:13,140 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 5058 transitions. [2021-06-12 15:27:13,140 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 15:27:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 5058 transitions. [2021-06-12 15:27:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:13,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:13,142 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 15:27:13,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:13,365 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1295650415, now seen corresponding path program 20 times [2021-06-12 15:27:13,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:13,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226675966] [2021-06-12 15:27:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:13,452 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 15:27:13,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:13,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226675966] [2021-06-12 15:27:13,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226675966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:13,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230986184] [2021-06-12 15:27:13,453 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 15:27:13,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:13,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:13,648 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 15:27:13,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230986184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:13,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:13,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:27:13,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121202965] [2021-06-12 15:27:13,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:13,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:13,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:13,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:13,650 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 15:27:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:13,961 INFO L93 Difference]: Finished difference Result 3144 states and 8303 transitions. [2021-06-12 15:27:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:13,962 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 15:27:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:13,964 INFO L225 Difference]: With dead ends: 3144 [2021-06-12 15:27:13,964 INFO L226 Difference]: Without dead ends: 2521 [2021-06-12 15:27:13,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:27:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-12 15:27:13,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1903. [2021-06-12 15:27:13,987 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 15:27:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5288 transitions. [2021-06-12 15:27:13,990 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5288 transitions. Word has length 65 [2021-06-12 15:27:13,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:13,990 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5288 transitions. [2021-06-12 15:27:13,990 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 15:27:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5288 transitions. [2021-06-12 15:27:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:13,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:13,993 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 15:27:14,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 15:27:14,215 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1237916285, now seen corresponding path program 21 times [2021-06-12 15:27:14,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:14,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243011369] [2021-06-12 15:27:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:14,297 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 15:27:14,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:14,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243011369] [2021-06-12 15:27:14,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243011369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:14,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134645847] [2021-06-12 15:27:14,297 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 15:27:14,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:27:14,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:14,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:14,493 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 15:27:14,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134645847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:14,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:14,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:27:14,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352575172] [2021-06-12 15:27:14,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:27:14,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:27:14,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:27:14,495 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 15:27:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:14,792 INFO L93 Difference]: Finished difference Result 3348 states and 8971 transitions. [2021-06-12 15:27:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:14,792 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 15:27:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:14,796 INFO L225 Difference]: With dead ends: 3348 [2021-06-12 15:27:14,796 INFO L226 Difference]: Without dead ends: 3078 [2021-06-12 15:27:14,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:27:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-12 15:27:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2083. [2021-06-12 15:27:14,827 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 15:27:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5847 transitions. [2021-06-12 15:27:14,830 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5847 transitions. Word has length 65 [2021-06-12 15:27:14,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:14,830 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 5847 transitions. [2021-06-12 15:27:14,830 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 15:27:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5847 transitions. [2021-06-12 15:27:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:27:14,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:14,833 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 15:27:15,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:15,055 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:15,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:15,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1260259535, now seen corresponding path program 22 times [2021-06-12 15:27:15,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:15,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568883980] [2021-06-12 15:27:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:15,138 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 15:27:15,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:15,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568883980] [2021-06-12 15:27:15,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568883980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:15,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101028185] [2021-06-12 15:27:15,139 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 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 15:27:15,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:15,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:15,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:27:15,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:15,345 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 15:27:15,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101028185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:15,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:15,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:27:15,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640058248] [2021-06-12 15:27:15,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:15,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:15,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:15,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:15,347 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 15:27:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:15,759 INFO L93 Difference]: Finished difference Result 3216 states and 8636 transitions. [2021-06-12 15:27:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:15,759 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 15:27:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:15,762 INFO L225 Difference]: With dead ends: 3216 [2021-06-12 15:27:15,762 INFO L226 Difference]: Without dead ends: 2641 [2021-06-12 15:27:15,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-06-12 15:27:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 1524. [2021-06-12 15:27:15,783 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 15:27:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4156 transitions. [2021-06-12 15:27:15,786 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4156 transitions. Word has length 65 [2021-06-12 15:27:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:15,786 INFO L482 AbstractCegarLoop]: Abstraction has 1524 states and 4156 transitions. [2021-06-12 15:27:15,786 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 15:27:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4156 transitions. [2021-06-12 15:27:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:15,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:15,788 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 15:27:16,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 15:27:16,011 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:16,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:16,011 INFO L82 PathProgramCache]: Analyzing trace with hash 632250685, now seen corresponding path program 23 times [2021-06-12 15:27:16,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:16,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451740353] [2021-06-12 15:27:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:16,131 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 15:27:16,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:16,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451740353] [2021-06-12 15:27:16,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451740353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:16,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173233658] [2021-06-12 15:27:16,132 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 15:27:16,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:27:16,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:16,371 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 15:27:16,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173233658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:16,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:16,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-12 15:27:16,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805884854] [2021-06-12 15:27:16,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:16,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:16,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:16,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:16,373 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 15:27:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:16,603 INFO L93 Difference]: Finished difference Result 2364 states and 6156 transitions. [2021-06-12 15:27:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:16,603 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 15:27:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:16,605 INFO L225 Difference]: With dead ends: 2364 [2021-06-12 15:27:16,605 INFO L226 Difference]: Without dead ends: 2030 [2021-06-12 15:27:16,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:27:16,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2021-06-12 15:27:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1609. [2021-06-12 15:27:16,620 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 15:27:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4326 transitions. [2021-06-12 15:27:16,622 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4326 transitions. Word has length 70 [2021-06-12 15:27:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:16,622 INFO L482 AbstractCegarLoop]: Abstraction has 1609 states and 4326 transitions. [2021-06-12 15:27:16,622 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 15:27:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4326 transitions. [2021-06-12 15:27:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:16,624 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:16,625 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 15:27:16,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:16,827 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:16,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:16,827 INFO L82 PathProgramCache]: Analyzing trace with hash -515245599, now seen corresponding path program 24 times [2021-06-12 15:27:16,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:16,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934558418] [2021-06-12 15:27:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:16,930 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 15:27:16,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:16,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934558418] [2021-06-12 15:27:16,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934558418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:16,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960164340] [2021-06-12 15:27:16,931 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 15:27:17,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:27:17,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:17,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:17,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:17,128 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 15:27:17,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960164340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:17,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:17,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:27:17,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162309884] [2021-06-12 15:27:17,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:17,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:17,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:17,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:17,129 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 15:27:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:17,308 INFO L93 Difference]: Finished difference Result 2686 states and 6737 transitions. [2021-06-12 15:27:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:27:17,308 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 15:27:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:17,311 INFO L225 Difference]: With dead ends: 2686 [2021-06-12 15:27:17,311 INFO L226 Difference]: Without dead ends: 2416 [2021-06-12 15:27:17,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:27:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-12 15:27:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1753. [2021-06-12 15:27:17,332 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 15:27:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4743 transitions. [2021-06-12 15:27:17,334 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4743 transitions. Word has length 70 [2021-06-12 15:27:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:17,335 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4743 transitions. [2021-06-12 15:27:17,335 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 15:27:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4743 transitions. [2021-06-12 15:27:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:17,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:17,337 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 15:27:17,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 15:27:17,553 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:17,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1201428783, now seen corresponding path program 25 times [2021-06-12 15:27:17,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:17,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346737503] [2021-06-12 15:27:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:17,674 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 15:27:17,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:17,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346737503] [2021-06-12 15:27:17,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346737503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:17,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076515385] [2021-06-12 15:27:17,675 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 15:27:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:17,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:17,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:17,872 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 15:27:17,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076515385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:17,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:17,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:27:17,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625521456] [2021-06-12 15:27:17,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:17,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:17,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:17,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:17,874 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 15:27:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:18,115 INFO L93 Difference]: Finished difference Result 2646 states and 6732 transitions. [2021-06-12 15:27:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:18,115 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 15:27:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:18,117 INFO L225 Difference]: With dead ends: 2646 [2021-06-12 15:27:18,117 INFO L226 Difference]: Without dead ends: 2376 [2021-06-12 15:27:18,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:27:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-06-12 15:27:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1828. [2021-06-12 15:27:18,137 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 15:27:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4968 transitions. [2021-06-12 15:27:18,139 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4968 transitions. Word has length 70 [2021-06-12 15:27:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:18,140 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 4968 transitions. [2021-06-12 15:27:18,140 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 15:27:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4968 transitions. [2021-06-12 15:27:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:18,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:18,142 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 15:27:18,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:18,352 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:18,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:18,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1286463521, now seen corresponding path program 26 times [2021-06-12 15:27:18,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:18,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521877761] [2021-06-12 15:27:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:18,445 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 15:27:18,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:18,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521877761] [2021-06-12 15:27:18,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521877761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:18,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16275234] [2021-06-12 15:27:18,446 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 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 15:27:18,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:18,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:18,620 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 15:27:18,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16275234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:18,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:18,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:27:18,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080933728] [2021-06-12 15:27:18,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:18,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:18,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:18,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:18,622 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 15:27:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:18,833 INFO L93 Difference]: Finished difference Result 2696 states and 6907 transitions. [2021-06-12 15:27:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:27:18,833 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 15:27:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:18,835 INFO L225 Difference]: With dead ends: 2696 [2021-06-12 15:27:18,835 INFO L226 Difference]: Without dead ends: 2426 [2021-06-12 15:27:18,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:27:18,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-12 15:27:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1903. [2021-06-12 15:27:18,878 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 15:27:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5193 transitions. [2021-06-12 15:27:18,881 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5193 transitions. Word has length 70 [2021-06-12 15:27:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:18,881 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5193 transitions. [2021-06-12 15:27:18,881 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 15:27:18,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5193 transitions. [2021-06-12 15:27:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:18,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:18,883 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 15:27:19,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 15:27:19,094 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:19,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:19,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1354614577, now seen corresponding path program 27 times [2021-06-12 15:27:19,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:19,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501789746] [2021-06-12 15:27:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:19,196 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 15:27:19,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:19,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501789746] [2021-06-12 15:27:19,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501789746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:19,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687326555] [2021-06-12 15:27:19,196 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 15:27:19,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:27:19,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:19,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:19,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:19,386 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 15:27:19,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687326555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:19,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:19,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:27:19,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448143484] [2021-06-12 15:27:19,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:19,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:19,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:19,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:19,387 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 15:27:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:19,653 INFO L93 Difference]: Finished difference Result 2721 states and 7032 transitions. [2021-06-12 15:27:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:27:19,653 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 15:27:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:19,655 INFO L225 Difference]: With dead ends: 2721 [2021-06-12 15:27:19,655 INFO L226 Difference]: Without dead ends: 2451 [2021-06-12 15:27:19,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:27:19,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-12 15:27:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1978. [2021-06-12 15:27:19,673 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 15:27:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5418 transitions. [2021-06-12 15:27:19,675 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5418 transitions. Word has length 70 [2021-06-12 15:27:19,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:19,676 INFO L482 AbstractCegarLoop]: Abstraction has 1978 states and 5418 transitions. [2021-06-12 15:27:19,676 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 15:27:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5418 transitions. [2021-06-12 15:27:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:19,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:19,678 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 15:27:19,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:19,893 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:19,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1643383645, now seen corresponding path program 28 times [2021-06-12 15:27:19,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:19,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739323187] [2021-06-12 15:27:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:19,997 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 15:27:19,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:19,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739323187] [2021-06-12 15:27:19,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739323187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:19,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395166173] [2021-06-12 15:27:19,998 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 15:27:20,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:20,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:20,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:20,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:20,176 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 15:27:20,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395166173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:20,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:20,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:27:20,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423036130] [2021-06-12 15:27:20,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:20,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:20,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:20,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:20,177 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 15:27:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:20,416 INFO L93 Difference]: Finished difference Result 2791 states and 7277 transitions. [2021-06-12 15:27:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:27:20,416 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 15:27:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:20,419 INFO L225 Difference]: With dead ends: 2791 [2021-06-12 15:27:20,419 INFO L226 Difference]: Without dead ends: 2521 [2021-06-12 15:27:20,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:27:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-12 15:27:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2053. [2021-06-12 15:27:20,441 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 15:27:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5658 transitions. [2021-06-12 15:27:20,444 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5658 transitions. Word has length 70 [2021-06-12 15:27:20,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:20,445 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5658 transitions. [2021-06-12 15:27:20,445 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 15:27:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5658 transitions. [2021-06-12 15:27:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:20,448 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:20,448 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 15:27:20,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 15:27:20,648 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2073137229, now seen corresponding path program 29 times [2021-06-12 15:27:20,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:20,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294363262] [2021-06-12 15:27:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:20,733 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 15:27:20,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:20,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294363262] [2021-06-12 15:27:20,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294363262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:20,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48587020] [2021-06-12 15:27:20,734 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 15:27:20,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:27:20,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:20,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:20,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:20,912 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 15:27:20,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48587020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:20,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:20,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:27:20,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101677874] [2021-06-12 15:27:20,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:20,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:20,914 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 15:27:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:21,282 INFO L93 Difference]: Finished difference Result 3369 states and 8903 transitions. [2021-06-12 15:27:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:27:21,282 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 15:27:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:21,285 INFO L225 Difference]: With dead ends: 3369 [2021-06-12 15:27:21,285 INFO L226 Difference]: Without dead ends: 2746 [2021-06-12 15:27:21,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 327.8ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-06-12 15:27:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2128. [2021-06-12 15:27:21,310 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 15:27:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-06-12 15:27:21,313 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-06-12 15:27:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:21,313 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-06-12 15:27:21,313 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 15:27:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-06-12 15:27:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:21,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:21,316 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 15:27:21,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 15:27:21,519 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:21,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:21,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2015403099, now seen corresponding path program 30 times [2021-06-12 15:27:21,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:21,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652931847] [2021-06-12 15:27:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:21,632 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 15:27:21,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:21,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652931847] [2021-06-12 15:27:21,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652931847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:21,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435913799] [2021-06-12 15:27:21,633 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 15:27:21,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:27:21,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:21,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:21,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:21,806 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 15:27:21,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435913799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:21,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:21,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:27:21,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638441992] [2021-06-12 15:27:21,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:27:21,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:21,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:27:21,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:27:21,808 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 15:27:22,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:22,070 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-06-12 15:27:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:22,070 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 15:27:22,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:22,074 INFO L225 Difference]: With dead ends: 3598 [2021-06-12 15:27:22,074 INFO L226 Difference]: Without dead ends: 3328 [2021-06-12 15:27:22,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:27:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-12 15:27:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-06-12 15:27:22,100 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 15:27:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-06-12 15:27:22,102 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-06-12 15:27:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:22,103 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-06-12 15:27:22,103 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 15:27:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-06-12 15:27:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:27:22,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:22,106 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 15:27:22,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 15:27:22,309 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2037746349, now seen corresponding path program 31 times [2021-06-12 15:27:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:22,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315417961] [2021-06-12 15:27:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:22,389 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 15:27:22,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:22,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315417961] [2021-06-12 15:27:22,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315417961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:22,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451463646] [2021-06-12 15:27:22,389 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 15:27:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:22,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:27:22,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:22,551 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 15:27:22,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451463646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:22,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:22,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:27:22,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318300985] [2021-06-12 15:27:22,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:22,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:22,552 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 15:27:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:22,940 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-06-12 15:27:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:27:22,941 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 15:27:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:22,944 INFO L225 Difference]: With dead ends: 3421 [2021-06-12 15:27:22,944 INFO L226 Difference]: Without dead ends: 2846 [2021-06-12 15:27:22,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-12 15:27:22,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-06-12 15:27:22,980 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 15:27:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-06-12 15:27:22,983 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-06-12 15:27:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:22,984 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-06-12 15:27:22,984 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 15:27:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-06-12 15:27:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:22,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:22,986 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 15:27:23,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 15:27:23,198 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:23,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:23,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1814233586, now seen corresponding path program 32 times [2021-06-12 15:27:23,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:23,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459708067] [2021-06-12 15:27:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:23,299 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 15:27:23,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:23,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459708067] [2021-06-12 15:27:23,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459708067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:23,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635370953] [2021-06-12 15:27:23,300 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 15:27:23,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:23,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:23,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:23,468 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 15:27:23,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635370953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:23,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:23,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:27:23,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698433579] [2021-06-12 15:27:23,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:23,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:23,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:23,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:23,469 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 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 15:27:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:23,704 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-06-12 15:27:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:23,705 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 15:27:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:23,708 INFO L225 Difference]: With dead ends: 2621 [2021-06-12 15:27:23,708 INFO L226 Difference]: Without dead ends: 2351 [2021-06-12 15:27:23,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:27:23,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-12 15:27:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-06-12 15:27:23,731 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 15:27:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-06-12 15:27:23,734 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-06-12 15:27:23,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:23,735 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-06-12 15:27:23,735 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 15:27:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-06-12 15:27:23,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:23,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:23,738 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 15:27:23,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:23,953 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1128050402, now seen corresponding path program 33 times [2021-06-12 15:27:23,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:23,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353478913] [2021-06-12 15:27:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:24,075 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 15:27:24,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:24,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353478913] [2021-06-12 15:27:24,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353478913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:24,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922913526] [2021-06-12 15:27:24,075 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 15:27:24,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:27:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:24,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:24,302 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 15:27:24,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922913526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:24,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:24,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-12 15:27:24,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47278362] [2021-06-12 15:27:24,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:24,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:24,303 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:24,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:24,605 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-06-12 15:27:24,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:27:24,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 15:27:24,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:24,609 INFO L225 Difference]: With dead ends: 2841 [2021-06-12 15:27:24,609 INFO L226 Difference]: Without dead ends: 2571 [2021-06-12 15:27:24,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:27:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-12 15:27:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-06-12 15:27:24,656 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 15:27:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-06-12 15:27:24,659 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-06-12 15:27:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:24,659 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-06-12 15:27:24,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-06-12 15:27:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:24,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:24,663 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 15:27:24,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 15:27:24,877 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1043015664, now seen corresponding path program 34 times [2021-06-12 15:27:24,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:24,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721452448] [2021-06-12 15:27:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:24,976 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 15:27:24,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:24,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721452448] [2021-06-12 15:27:24,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721452448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:24,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167405883] [2021-06-12 15:27:24,977 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 15:27:25,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:25,141 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 15:27:25,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167405883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:25,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:25,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:27:25,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395270864] [2021-06-12 15:27:25,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:25,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:25,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:25,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:25,142 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 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 15:27:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:25,379 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-06-12 15:27:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:25,380 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 15:27:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:25,382 INFO L225 Difference]: With dead ends: 2871 [2021-06-12 15:27:25,382 INFO L226 Difference]: Without dead ends: 2601 [2021-06-12 15:27:25,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:27:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-12 15:27:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-06-12 15:27:25,407 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 15:27:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-06-12 15:27:25,410 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-06-12 15:27:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:25,411 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-06-12 15:27:25,411 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 15:27:25,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-06-12 15:27:25,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:25,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:25,413 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 15:27:25,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 15:27:25,629 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:25,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:25,629 INFO L82 PathProgramCache]: Analyzing trace with hash 974864608, now seen corresponding path program 35 times [2021-06-12 15:27:25,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:25,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437670544] [2021-06-12 15:27:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:25,742 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 15:27:25,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:25,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437670544] [2021-06-12 15:27:25,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437670544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:25,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143479565] [2021-06-12 15:27:25,742 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 15:27:25,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:27:25,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:25,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:25,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:25,949 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 15:27:25,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143479565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:25,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:25,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-12 15:27:25,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628097331] [2021-06-12 15:27:25,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:25,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:25,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:25,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:25,951 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:26,303 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-06-12 15:27:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:26,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 15:27:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:26,307 INFO L225 Difference]: With dead ends: 2896 [2021-06-12 15:27:26,307 INFO L226 Difference]: Without dead ends: 2626 [2021-06-12 15:27:26,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:27:26,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-12 15:27:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-06-12 15:27:26,329 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 15:27:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-06-12 15:27:26,331 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-06-12 15:27:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:26,331 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-06-12 15:27:26,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-06-12 15:27:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:26,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:26,333 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 15:27:26,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:26,534 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:26,534 INFO L82 PathProgramCache]: Analyzing trace with hash -322104466, now seen corresponding path program 36 times [2021-06-12 15:27:26,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:26,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568709386] [2021-06-12 15:27:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:26,634 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 15:27:26,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:26,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568709386] [2021-06-12 15:27:26,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568709386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:26,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958891171] [2021-06-12 15:27:26,637 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 15:27:26,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:27:26,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:26,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:26,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:26,833 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 15:27:26,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958891171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:26,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:26,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:27:26,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151236154] [2021-06-12 15:27:26,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:26,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:26,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:26,835 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 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 15:27:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:27,145 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-06-12 15:27:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:27:27,146 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 15:27:27,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:27,150 INFO L225 Difference]: With dead ends: 2966 [2021-06-12 15:27:27,150 INFO L226 Difference]: Without dead ends: 2696 [2021-06-12 15:27:27,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:27:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-12 15:27:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-06-12 15:27:27,180 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 15:27:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-06-12 15:27:27,184 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-06-12 15:27:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:27,184 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-06-12 15:27:27,184 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 15:27:27,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-06-12 15:27:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:27,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:27,187 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 15:27:27,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 15:27:27,411 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash 107649118, now seen corresponding path program 37 times [2021-06-12 15:27:27,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:27,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842805255] [2021-06-12 15:27:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:27,513 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 15:27:27,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:27,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842805255] [2021-06-12 15:27:27,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842805255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:27,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519555988] [2021-06-12 15:27:27,514 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 15:27:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:27,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:27,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:27,719 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 15:27:27,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519555988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:27,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:27,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-12 15:27:27,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908746027] [2021-06-12 15:27:27,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:27,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:27,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:27,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:27,720 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:28,146 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-06-12 15:27:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 15:27:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:28,150 INFO L225 Difference]: With dead ends: 3544 [2021-06-12 15:27:28,150 INFO L226 Difference]: Without dead ends: 2921 [2021-06-12 15:27:28,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 382.6ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-12 15:27:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-06-12 15:27:28,178 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 15:27:28,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-12 15:27:28,182 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-12 15:27:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:28,182 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-12 15:27:28,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-12 15:27:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:28,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:28,185 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 15:27:28,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:28,408 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:28,409 INFO L82 PathProgramCache]: Analyzing trace with hash 49914988, now seen corresponding path program 38 times [2021-06-12 15:27:28,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:28,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326676995] [2021-06-12 15:27:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:28,502 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 15:27:28,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:28,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326676995] [2021-06-12 15:27:28,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326676995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:28,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376300918] [2021-06-12 15:27:28,502 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 15:27:28,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:28,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:28,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:28,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:28,674 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 15:27:28,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376300918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:28,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:28,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:27:28,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023149773] [2021-06-12 15:27:28,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:27:28,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:28,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:27:28,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:27:28,675 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 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 15:27:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:28,980 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-12 15:27:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:28,981 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 15:27:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:28,984 INFO L225 Difference]: With dead ends: 3748 [2021-06-12 15:27:28,984 INFO L226 Difference]: Without dead ends: 3478 [2021-06-12 15:27:28,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:27:28,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-12 15:27:29,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-12 15:27:29,008 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 15:27:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-12 15:27:29,010 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-12 15:27:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:29,011 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-12 15:27:29,011 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 15:27:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-12 15:27:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:27:29,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:29,013 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 15:27:29,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 15:27:29,213 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash 72258238, now seen corresponding path program 39 times [2021-06-12 15:27:29,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:29,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874238000] [2021-06-12 15:27:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:29,314 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 15:27:29,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:29,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874238000] [2021-06-12 15:27:29,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874238000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:29,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627526611] [2021-06-12 15:27:29,315 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 15:27:29,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:27:29,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:27:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:29,544 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 15:27:29,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627526611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:29,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:29,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-12 15:27:29,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416469759] [2021-06-12 15:27:29,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:29,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:29,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:29,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:29,546 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 15:27:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:29,990 INFO L93 Difference]: Finished difference Result 3616 states and 9736 transitions. [2021-06-12 15:27:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:27:29,991 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 15:27:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:29,994 INFO L225 Difference]: With dead ends: 3616 [2021-06-12 15:27:29,994 INFO L226 Difference]: Without dead ends: 3041 [2021-06-12 15:27:29,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:27:29,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-06-12 15:27:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1724. [2021-06-12 15:27:30,011 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 15:27:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4706 transitions. [2021-06-12 15:27:30,013 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4706 transitions. Word has length 75 [2021-06-12 15:27:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:30,013 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 4706 transitions. [2021-06-12 15:27:30,013 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 15:27:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4706 transitions. [2021-06-12 15:27:30,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:30,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:30,015 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 15:27:30,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:30,215 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:30,216 INFO L82 PathProgramCache]: Analyzing trace with hash -711333330, now seen corresponding path program 40 times [2021-06-12 15:27:30,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:30,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597768374] [2021-06-12 15:27:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:30,340 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 15:27:30,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:30,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597768374] [2021-06-12 15:27:30,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597768374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:30,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782581531] [2021-06-12 15:27:30,341 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 15:27:30,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:30,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:30,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:30,548 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 15:27:30,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782581531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:30,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:30,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-12 15:27:30,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337543870] [2021-06-12 15:27:30,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:27:30,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:30,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:27:30,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:27:30,549 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 15:27:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:30,832 INFO L93 Difference]: Finished difference Result 2614 states and 6806 transitions. [2021-06-12 15:27:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:27:30,833 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 15:27:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:30,835 INFO L225 Difference]: With dead ends: 2614 [2021-06-12 15:27:30,835 INFO L226 Difference]: Without dead ends: 2280 [2021-06-12 15:27:30,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-12 15:27:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1809. [2021-06-12 15:27:30,854 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 15:27:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 4876 transitions. [2021-06-12 15:27:30,857 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 4876 transitions. Word has length 80 [2021-06-12 15:27:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:30,857 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 4876 transitions. [2021-06-12 15:27:30,857 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 15:27:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 4876 transitions. [2021-06-12 15:27:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:30,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:30,859 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 15:27:31,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 15:27:31,059 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2057763374, now seen corresponding path program 41 times [2021-06-12 15:27:31,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:31,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410403973] [2021-06-12 15:27:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:31,196 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 15:27:31,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:31,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410403973] [2021-06-12 15:27:31,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410403973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:31,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771603870] [2021-06-12 15:27:31,197 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 15:27:31,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:27:31,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:31,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:31,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:31,387 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 15:27:31,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771603870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:31,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:31,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:27:31,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511950475] [2021-06-12 15:27:31,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:31,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:31,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:31,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:31,388 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 15:27:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:31,575 INFO L93 Difference]: Finished difference Result 3036 states and 7587 transitions. [2021-06-12 15:27:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:27:31,575 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 15:27:31,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:31,578 INFO L225 Difference]: With dead ends: 3036 [2021-06-12 15:27:31,578 INFO L226 Difference]: Without dead ends: 2766 [2021-06-12 15:27:31,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 231.4ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:27:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-12 15:27:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1953. [2021-06-12 15:27:31,595 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 15:27:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5293 transitions. [2021-06-12 15:27:31,597 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5293 transitions. Word has length 80 [2021-06-12 15:27:31,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:31,597 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5293 transitions. [2021-06-12 15:27:31,597 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 15:27:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5293 transitions. [2021-06-12 15:27:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:31,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:31,599 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 15:27:31,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 15:27:31,801 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1337149122, now seen corresponding path program 42 times [2021-06-12 15:27:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:31,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202413335] [2021-06-12 15:27:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:31,934 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 15:27:31,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:31,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202413335] [2021-06-12 15:27:31,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202413335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:31,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686402693] [2021-06-12 15:27:31,934 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 15:27:32,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:27:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:32,149 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 15:27:32,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686402693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:32,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:32,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:27:32,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985055087] [2021-06-12 15:27:32,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:32,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:32,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:32,150 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 15:27:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:32,401 INFO L93 Difference]: Finished difference Result 2996 states and 7582 transitions. [2021-06-12 15:27:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:27:32,401 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 15:27:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:32,404 INFO L225 Difference]: With dead ends: 2996 [2021-06-12 15:27:32,404 INFO L226 Difference]: Without dead ends: 2726 [2021-06-12 15:27:32,404 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:27:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-12 15:27:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2028. [2021-06-12 15:27:32,422 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 15:27:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5518 transitions. [2021-06-12 15:27:32,425 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5518 transitions. Word has length 80 [2021-06-12 15:27:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:32,425 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5518 transitions. [2021-06-12 15:27:32,425 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 15:27:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5518 transitions. [2021-06-12 15:27:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:32,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:32,427 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 15:27:32,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:32,628 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:32,628 INFO L82 PathProgramCache]: Analyzing trace with hash 908084816, now seen corresponding path program 43 times [2021-06-12 15:27:32,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:32,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900893348] [2021-06-12 15:27:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:32,757 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 15:27:32,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:32,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900893348] [2021-06-12 15:27:32,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900893348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:32,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454798906] [2021-06-12 15:27:32,757 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 15:27:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:32,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:32,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:32,950 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 15:27:32,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454798906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:32,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:32,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:27:32,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265292180] [2021-06-12 15:27:32,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:32,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:32,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:32,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:32,951 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 15:27:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:33,195 INFO L93 Difference]: Finished difference Result 3046 states and 7757 transitions. [2021-06-12 15:27:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:27:33,196 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 15:27:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:33,198 INFO L225 Difference]: With dead ends: 3046 [2021-06-12 15:27:33,198 INFO L226 Difference]: Without dead ends: 2776 [2021-06-12 15:27:33,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:27:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-12 15:27:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2103. [2021-06-12 15:27:33,216 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 15:27:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5743 transitions. [2021-06-12 15:27:33,218 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5743 transitions. Word has length 80 [2021-06-12 15:27:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:33,218 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5743 transitions. [2021-06-12 15:27:33,219 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 15:27:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5743 transitions. [2021-06-12 15:27:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:33,220 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:33,220 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 15:27:33,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 15:27:33,421 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:33,421 INFO L82 PathProgramCache]: Analyzing trace with hash 221901632, now seen corresponding path program 44 times [2021-06-12 15:27:33,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:33,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500889542] [2021-06-12 15:27:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:33,541 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 15:27:33,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:33,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500889542] [2021-06-12 15:27:33,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500889542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:33,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122907334] [2021-06-12 15:27:33,542 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 15:27:33,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:33,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:33,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:33,733 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 15:27:33,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122907334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:33,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:33,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:27:33,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066400455] [2021-06-12 15:27:33,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:33,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:33,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:33,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:33,734 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 15:27:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:34,060 INFO L93 Difference]: Finished difference Result 3071 states and 7882 transitions. [2021-06-12 15:27:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:34,061 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 15:27:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:34,063 INFO L225 Difference]: With dead ends: 3071 [2021-06-12 15:27:34,063 INFO L226 Difference]: Without dead ends: 2801 [2021-06-12 15:27:34,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-12 15:27:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2178. [2021-06-12 15:27:34,085 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 15:27:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 5968 transitions. [2021-06-12 15:27:34,087 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 5968 transitions. Word has length 80 [2021-06-12 15:27:34,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:34,088 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 5968 transitions. [2021-06-12 15:27:34,088 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 15:27:34,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 5968 transitions. [2021-06-12 15:27:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:34,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:34,089 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 15:27:34,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:34,293 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash 136866894, now seen corresponding path program 45 times [2021-06-12 15:27:34,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:34,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256256146] [2021-06-12 15:27:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:34,404 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 15:27:34,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:34,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256256146] [2021-06-12 15:27:34,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256256146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:34,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114710446] [2021-06-12 15:27:34,405 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 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 15:27:34,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:27:34,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:34,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:34,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:34,578 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 15:27:34,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114710446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:34,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:34,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:27:34,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131346886] [2021-06-12 15:27:34,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:34,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:34,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:34,579 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 15:27:34,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:34,897 INFO L93 Difference]: Finished difference Result 3096 states and 8007 transitions. [2021-06-12 15:27:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:34,898 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 15:27:34,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:34,900 INFO L225 Difference]: With dead ends: 3096 [2021-06-12 15:27:34,900 INFO L226 Difference]: Without dead ends: 2826 [2021-06-12 15:27:34,900 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:27:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-12 15:27:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-06-12 15:27:34,920 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 15:27:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6193 transitions. [2021-06-12 15:27:34,922 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6193 transitions. Word has length 80 [2021-06-12 15:27:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:34,923 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6193 transitions. [2021-06-12 15:27:34,923 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 15:27:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6193 transitions. [2021-06-12 15:27:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:34,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:34,924 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 15:27:35,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:35,125 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash 68715838, now seen corresponding path program 46 times [2021-06-12 15:27:35,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:35,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718393017] [2021-06-12 15:27:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:35,242 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 15:27:35,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:35,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718393017] [2021-06-12 15:27:35,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718393017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:35,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942620064] [2021-06-12 15:27:35,242 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 15:27:35,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:35,456 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 15:27:35,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942620064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:35,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:35,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:27:35,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841819866] [2021-06-12 15:27:35,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:35,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:35,458 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 15:27:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:35,842 INFO L93 Difference]: Finished difference Result 3121 states and 8132 transitions. [2021-06-12 15:27:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:27:35,843 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 15:27:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:35,845 INFO L225 Difference]: With dead ends: 3121 [2021-06-12 15:27:35,845 INFO L226 Difference]: Without dead ends: 2851 [2021-06-12 15:27:35,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:27:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-12 15:27:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2328. [2021-06-12 15:27:35,870 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 15:27:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6418 transitions. [2021-06-12 15:27:35,873 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6418 transitions. Word has length 80 [2021-06-12 15:27:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:35,873 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6418 transitions. [2021-06-12 15:27:35,873 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 15:27:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6418 transitions. [2021-06-12 15:27:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:35,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:35,875 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 15:27:36,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 15:27:36,076 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:36,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1228253236, now seen corresponding path program 47 times [2021-06-12 15:27:36,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:36,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610810524] [2021-06-12 15:27:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:36,191 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 15:27:36,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:36,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610810524] [2021-06-12 15:27:36,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610810524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:36,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604699097] [2021-06-12 15:27:36,192 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 15:27:36,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:27:36,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:36,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:36,386 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 15:27:36,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604699097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:36,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:36,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:27:36,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525626615] [2021-06-12 15:27:36,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:36,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:36,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:36,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:36,387 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 15:27:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:36,681 INFO L93 Difference]: Finished difference Result 3191 states and 8377 transitions. [2021-06-12 15:27:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:27:36,682 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 15:27:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:36,684 INFO L225 Difference]: With dead ends: 3191 [2021-06-12 15:27:36,685 INFO L226 Difference]: Without dead ends: 2921 [2021-06-12 15:27:36,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:27:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-12 15:27:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2403. [2021-06-12 15:27:36,706 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 15:27:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 6658 transitions. [2021-06-12 15:27:36,708 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 6658 transitions. Word has length 80 [2021-06-12 15:27:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:36,708 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 6658 transitions. [2021-06-12 15:27:36,709 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 15:27:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 6658 transitions. [2021-06-12 15:27:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:36,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:36,710 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 15:27:36,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:36,911 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:36,911 INFO L82 PathProgramCache]: Analyzing trace with hash -798499652, now seen corresponding path program 48 times [2021-06-12 15:27:36,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:36,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056138888] [2021-06-12 15:27:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:37,005 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 15:27:37,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:37,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056138888] [2021-06-12 15:27:37,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056138888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:37,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026765096] [2021-06-12 15:27:37,006 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 15:27:37,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:27:37,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:37,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:37,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:37,191 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 15:27:37,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026765096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:37,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:37,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:27:37,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152972586] [2021-06-12 15:27:37,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:37,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:37,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:37,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:37,192 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 15:27:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:37,642 INFO L93 Difference]: Finished difference Result 3769 states and 10003 transitions. [2021-06-12 15:27:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:27:37,642 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 15:27:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:37,645 INFO L225 Difference]: With dead ends: 3769 [2021-06-12 15:27:37,645 INFO L226 Difference]: Without dead ends: 3146 [2021-06-12 15:27:37,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 393.1ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:27:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-06-12 15:27:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2478. [2021-06-12 15:27:37,665 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 15:27:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6888 transitions. [2021-06-12 15:27:37,667 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6888 transitions. Word has length 80 [2021-06-12 15:27:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:37,668 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6888 transitions. [2021-06-12 15:27:37,668 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 15:27:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6888 transitions. [2021-06-12 15:27:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:37,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:37,670 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 15:27:37,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 15:27:37,870 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:37,870 INFO L82 PathProgramCache]: Analyzing trace with hash -856233782, now seen corresponding path program 49 times [2021-06-12 15:27:37,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:37,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450665383] [2021-06-12 15:27:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:37,963 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 15:27:37,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:37,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450665383] [2021-06-12 15:27:37,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450665383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:37,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626183126] [2021-06-12 15:27:37,964 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 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 15:27:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:38,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:38,128 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 15:27:38,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626183126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:38,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:38,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:27:38,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655899783] [2021-06-12 15:27:38,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:27:38,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:38,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:27:38,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:27:38,129 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 15:27:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:38,484 INFO L93 Difference]: Finished difference Result 3998 states and 10721 transitions. [2021-06-12 15:27:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:38,484 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 15:27:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:38,489 INFO L225 Difference]: With dead ends: 3998 [2021-06-12 15:27:38,489 INFO L226 Difference]: Without dead ends: 3728 [2021-06-12 15:27:38,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:27:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-06-12 15:27:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2658. [2021-06-12 15:27:38,522 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 15:27:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 7447 transitions. [2021-06-12 15:27:38,526 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 7447 transitions. Word has length 80 [2021-06-12 15:27:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:38,526 INFO L482 AbstractCegarLoop]: Abstraction has 2658 states and 7447 transitions. [2021-06-12 15:27:38,526 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 15:27:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 7447 transitions. [2021-06-12 15:27:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:27:38,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:38,528 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 15:27:38,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 15:27:38,751 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:38,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:38,752 INFO L82 PathProgramCache]: Analyzing trace with hash -833890532, now seen corresponding path program 50 times [2021-06-12 15:27:38,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:38,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231569399] [2021-06-12 15:27:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:38,862 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 15:27:38,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:38,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231569399] [2021-06-12 15:27:38,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231569399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:38,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944595588] [2021-06-12 15:27:38,863 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 15:27:38,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:38,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:27:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:39,062 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 15:27:39,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944595588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:39,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:39,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:27:39,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449137481] [2021-06-12 15:27:39,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:39,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:39,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:39,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:39,064 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 15:27:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:39,568 INFO L93 Difference]: Finished difference Result 3821 states and 10221 transitions. [2021-06-12 15:27:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:27:39,569 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 15:27:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:39,572 INFO L225 Difference]: With dead ends: 3821 [2021-06-12 15:27:39,572 INFO L226 Difference]: Without dead ends: 3246 [2021-06-12 15:27:39,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:27:39,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-06-12 15:27:39,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 2003. [2021-06-12 15:27:39,593 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 15:27:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 5468 transitions. [2021-06-12 15:27:39,595 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 5468 transitions. Word has length 80 [2021-06-12 15:27:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:39,596 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 5468 transitions. [2021-06-12 15:27:39,596 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 15:27:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 5468 transitions. [2021-06-12 15:27:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:39,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:39,597 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 15:27:39,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 15:27:39,798 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:39,798 INFO L82 PathProgramCache]: Analyzing trace with hash 498592931, now seen corresponding path program 51 times [2021-06-12 15:27:39,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:39,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873109799] [2021-06-12 15:27:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:39,931 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 15:27:39,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:39,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873109799] [2021-06-12 15:27:39,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873109799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:39,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821187728] [2021-06-12 15:27:39,931 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 15:27:40,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:27:40,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:40,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:40,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:40,147 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 15:27:40,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821187728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:40,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:40,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:27:40,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512403366] [2021-06-12 15:27:40,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:40,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:40,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:40,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:40,149 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 15:27:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:40,399 INFO L93 Difference]: Finished difference Result 2921 states and 7507 transitions. [2021-06-12 15:27:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:27:40,399 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 15:27:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:40,402 INFO L225 Difference]: With dead ends: 2921 [2021-06-12 15:27:40,402 INFO L226 Difference]: Without dead ends: 2651 [2021-06-12 15:27:40,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:27:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-12 15:27:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2078. [2021-06-12 15:27:40,419 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 15:27:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 5693 transitions. [2021-06-12 15:27:40,421 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 5693 transitions. Word has length 85 [2021-06-12 15:27:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:40,422 INFO L482 AbstractCegarLoop]: Abstraction has 2078 states and 5693 transitions. [2021-06-12 15:27:40,422 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 15:27:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 5693 transitions. [2021-06-12 15:27:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:40,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:40,423 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 15:27:40,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 15:27:40,624 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:40,624 INFO L82 PathProgramCache]: Analyzing trace with hash -401461869, now seen corresponding path program 52 times [2021-06-12 15:27:40,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:40,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709834332] [2021-06-12 15:27:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:40,750 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 15:27:40,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:40,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709834332] [2021-06-12 15:27:40,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709834332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:40,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139039289] [2021-06-12 15:27:40,751 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 15:27:40,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:40,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:40,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:40,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:40,934 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 15:27:40,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139039289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:40,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:40,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:27:40,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729172210] [2021-06-12 15:27:40,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:40,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:40,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:40,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:40,935 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 15:27:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:41,259 INFO L93 Difference]: Finished difference Result 3191 states and 8122 transitions. [2021-06-12 15:27:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:41,259 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 15:27:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:41,261 INFO L225 Difference]: With dead ends: 3191 [2021-06-12 15:27:41,261 INFO L226 Difference]: Without dead ends: 2921 [2021-06-12 15:27:41,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:27:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-12 15:27:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2153. [2021-06-12 15:27:41,279 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 15:27:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5918 transitions. [2021-06-12 15:27:41,282 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5918 transitions. Word has length 85 [2021-06-12 15:27:41,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:41,282 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5918 transitions. [2021-06-12 15:27:41,282 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 15:27:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5918 transitions. [2021-06-12 15:27:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:41,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:41,284 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 15:27:41,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:41,484 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:41,484 INFO L82 PathProgramCache]: Analyzing trace with hash -830526175, now seen corresponding path program 53 times [2021-06-12 15:27:41,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:41,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127384557] [2021-06-12 15:27:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:41,606 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 15:27:41,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:41,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127384557] [2021-06-12 15:27:41,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127384557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:41,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918869745] [2021-06-12 15:27:41,606 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 15:27:41,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:27:41,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:41,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:41,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:41,775 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 15:27:41,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918869745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:41,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:41,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:27:41,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948561992] [2021-06-12 15:27:41,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:41,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:41,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:41,777 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 15:27:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:42,047 INFO L93 Difference]: Finished difference Result 3221 states and 8257 transitions. [2021-06-12 15:27:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:27:42,047 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 15:27:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:42,050 INFO L225 Difference]: With dead ends: 3221 [2021-06-12 15:27:42,050 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 15:27:42,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:27:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 15:27:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2228. [2021-06-12 15:27:42,070 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 15:27:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6143 transitions. [2021-06-12 15:27:42,074 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6143 transitions. Word has length 85 [2021-06-12 15:27:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:42,074 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6143 transitions. [2021-06-12 15:27:42,074 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 15:27:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6143 transitions. [2021-06-12 15:27:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:42,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:42,077 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 15:27:42,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:42,285 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:42,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1516709359, now seen corresponding path program 54 times [2021-06-12 15:27:42,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:42,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125936584] [2021-06-12 15:27:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:42,415 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 15:27:42,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:42,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125936584] [2021-06-12 15:27:42,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125936584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:42,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888180283] [2021-06-12 15:27:42,416 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 15:27:42,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:27:42,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:42,647 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 15:27:42,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888180283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:42,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:42,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:27:42,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772233497] [2021-06-12 15:27:42,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:42,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:42,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:42,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:42,648 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 15:27:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:43,017 INFO L93 Difference]: Finished difference Result 3246 states and 8382 transitions. [2021-06-12 15:27:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:27:43,017 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 15:27:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:43,019 INFO L225 Difference]: With dead ends: 3246 [2021-06-12 15:27:43,019 INFO L226 Difference]: Without dead ends: 2976 [2021-06-12 15:27:43,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 370.2ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-12 15:27:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2303. [2021-06-12 15:27:43,041 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 15:27:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6368 transitions. [2021-06-12 15:27:43,043 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6368 transitions. Word has length 85 [2021-06-12 15:27:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:43,043 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6368 transitions. [2021-06-12 15:27:43,044 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 15:27:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6368 transitions. [2021-06-12 15:27:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:43,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:43,045 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 15:27:43,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:43,246 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:43,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1601744097, now seen corresponding path program 55 times [2021-06-12 15:27:43,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:43,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884762226] [2021-06-12 15:27:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:43,368 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 15:27:43,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:43,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884762226] [2021-06-12 15:27:43,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884762226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:43,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190531206] [2021-06-12 15:27:43,368 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 15:27:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:43,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:43,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:43,550 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 15:27:43,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190531206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:43,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:43,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:27:43,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002915496] [2021-06-12 15:27:43,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:43,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:43,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:43,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:43,551 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 15:27:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:43,874 INFO L93 Difference]: Finished difference Result 3271 states and 8507 transitions. [2021-06-12 15:27:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:43,874 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 15:27:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:43,877 INFO L225 Difference]: With dead ends: 3271 [2021-06-12 15:27:43,877 INFO L226 Difference]: Without dead ends: 3001 [2021-06-12 15:27:43,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-12 15:27:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2378. [2021-06-12 15:27:43,897 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 15:27:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6593 transitions. [2021-06-12 15:27:43,900 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6593 transitions. Word has length 85 [2021-06-12 15:27:43,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:43,900 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6593 transitions. [2021-06-12 15:27:43,900 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 15:27:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6593 transitions. [2021-06-12 15:27:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:43,902 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:43,902 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 15:27:44,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 15:27:44,103 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:44,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1669895153, now seen corresponding path program 56 times [2021-06-12 15:27:44,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:44,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229611644] [2021-06-12 15:27:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:44,210 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 15:27:44,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229611644] [2021-06-12 15:27:44,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229611644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656235597] [2021-06-12 15:27:44,211 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 15:27:44,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:44,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:44,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:44,402 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 15:27:44,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656235597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:44,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:44,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:27:44,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733337550] [2021-06-12 15:27:44,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:44,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:44,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:44,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:44,403 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 15:27:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:44,792 INFO L93 Difference]: Finished difference Result 3296 states and 8632 transitions. [2021-06-12 15:27:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:44,792 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 15:27:44,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:44,795 INFO L225 Difference]: With dead ends: 3296 [2021-06-12 15:27:44,795 INFO L226 Difference]: Without dead ends: 3026 [2021-06-12 15:27:44,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:27:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-06-12 15:27:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2453. [2021-06-12 15:27:44,815 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 15:27:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6818 transitions. [2021-06-12 15:27:44,818 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6818 transitions. Word has length 85 [2021-06-12 15:27:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:44,818 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6818 transitions. [2021-06-12 15:27:44,818 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 15:27:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6818 transitions. [2021-06-12 15:27:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:44,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:44,820 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 15:27:45,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:45,021 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1328103069, now seen corresponding path program 57 times [2021-06-12 15:27:45,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:45,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973156959] [2021-06-12 15:27:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:45,136 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 15:27:45,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:45,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973156959] [2021-06-12 15:27:45,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973156959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:45,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097739548] [2021-06-12 15:27:45,136 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 15:27:45,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:27:45,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:45,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:45,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:45,358 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 15:27:45,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097739548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:45,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:45,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:27:45,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689603238] [2021-06-12 15:27:45,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:45,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:45,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:45,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:45,359 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 15:27:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:45,737 INFO L93 Difference]: Finished difference Result 3366 states and 8877 transitions. [2021-06-12 15:27:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:27:45,737 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 15:27:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:45,740 INFO L225 Difference]: With dead ends: 3366 [2021-06-12 15:27:45,740 INFO L226 Difference]: Without dead ends: 3096 [2021-06-12 15:27:45,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:27:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-06-12 15:27:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2528. [2021-06-12 15:27:45,765 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 15:27:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 7058 transitions. [2021-06-12 15:27:45,769 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 7058 transitions. Word has length 85 [2021-06-12 15:27:45,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:45,769 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 7058 transitions. [2021-06-12 15:27:45,769 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 15:27:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 7058 transitions. [2021-06-12 15:27:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:45,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:45,771 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 15:27:45,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 15:27:45,971 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:45,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1757856653, now seen corresponding path program 58 times [2021-06-12 15:27:45,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:45,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334523887] [2021-06-12 15:27:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:46,082 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 15:27:46,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:46,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334523887] [2021-06-12 15:27:46,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334523887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:46,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415063917] [2021-06-12 15:27:46,082 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 15:27:46,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:46,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:46,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:46,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:46,291 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 15:27:46,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415063917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:46,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:46,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:27:46,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027618742] [2021-06-12 15:27:46,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:46,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:46,296 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 15:27:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:46,799 INFO L93 Difference]: Finished difference Result 3944 states and 10503 transitions. [2021-06-12 15:27:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:27:46,799 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 15:27:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:46,802 INFO L225 Difference]: With dead ends: 3944 [2021-06-12 15:27:46,802 INFO L226 Difference]: Without dead ends: 3321 [2021-06-12 15:27:46,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:27:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-12 15:27:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2603. [2021-06-12 15:27:46,822 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 15:27:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-12 15:27:46,825 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-12 15:27:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:46,825 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-12 15:27:46,825 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 15:27:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-12 15:27:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:46,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:46,827 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 15:27:47,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:47,028 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:47,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1700122523, now seen corresponding path program 59 times [2021-06-12 15:27:47,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:47,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454418283] [2021-06-12 15:27:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:47,139 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 15:27:47,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:47,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454418283] [2021-06-12 15:27:47,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454418283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:47,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875609940] [2021-06-12 15:27:47,140 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 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 15:27:47,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:27:47,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:47,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:47,318 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 15:27:47,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875609940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:47,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:47,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:27:47,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186471448] [2021-06-12 15:27:47,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:47,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:47,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:47,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:47,319 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 15:27:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:47,685 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-12 15:27:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:27:47,685 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 15:27:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:47,689 INFO L225 Difference]: With dead ends: 4148 [2021-06-12 15:27:47,689 INFO L226 Difference]: Without dead ends: 3878 [2021-06-12 15:27:47,690 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:27:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-12 15:27:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-12 15:27:47,715 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 15:27:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-12 15:27:47,718 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-12 15:27:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:47,718 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-12 15:27:47,718 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 15:27:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-12 15:27:47,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:27:47,720 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:47,720 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 15:27:47,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 15:27:47,921 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1722465773, now seen corresponding path program 60 times [2021-06-12 15:27:47,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:47,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576312328] [2021-06-12 15:27:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:48,018 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 15:27:48,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:48,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576312328] [2021-06-12 15:27:48,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576312328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:48,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316023586] [2021-06-12 15:27:48,018 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 15:27:48,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:27:48,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:27:48,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:48,242 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 15:27:48,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316023586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:48,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:48,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:27:48,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099822237] [2021-06-12 15:27:48,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:48,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:48,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:48,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:48,244 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 15:27:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:48,770 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-12 15:27:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:27:48,771 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 15:27:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:48,774 INFO L225 Difference]: With dead ends: 4016 [2021-06-12 15:27:48,774 INFO L226 Difference]: Without dead ends: 3441 [2021-06-12 15:27:48,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:27:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-12 15:27:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-12 15:27:48,793 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 15:27:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-12 15:27:48,795 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-12 15:27:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:48,795 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-12 15:27:48,795 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 15:27:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-12 15:27:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:48,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:48,796 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 15:27:48,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:48,999 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:48,999 INFO L82 PathProgramCache]: Analyzing trace with hash -750339617, now seen corresponding path program 61 times [2021-06-12 15:27:48,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:48,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104788142] [2021-06-12 15:27:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:49,143 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 15:27:49,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:49,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104788142] [2021-06-12 15:27:49,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104788142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:49,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146021280] [2021-06-12 15:27:49,144 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 15:27:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:49,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:27:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:49,356 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 15:27:49,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146021280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:49,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:49,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-12 15:27:49,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912860790] [2021-06-12 15:27:49,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:27:49,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:49,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:27:49,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:49,358 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 15:27:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:49,662 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-12 15:27:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:49,662 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 15:27:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:49,665 INFO L225 Difference]: With dead ends: 2864 [2021-06-12 15:27:49,665 INFO L226 Difference]: Without dead ends: 2530 [2021-06-12 15:27:49,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-12 15:27:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-12 15:27:49,694 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 15:27:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-12 15:27:49,696 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-12 15:27:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:49,696 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-12 15:27:49,696 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 15:27:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-12 15:27:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:49,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:49,699 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 15:27:49,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 15:27:49,915 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:49,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1583179645, now seen corresponding path program 62 times [2021-06-12 15:27:49,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:49,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262448879] [2021-06-12 15:27:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:50,050 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 15:27:50,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:50,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262448879] [2021-06-12 15:27:50,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262448879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:50,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789865959] [2021-06-12 15:27:50,050 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 15:27:50,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:50,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:50,246 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 15:27:50,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789865959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:50,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:50,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:27:50,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816340435] [2021-06-12 15:27:50,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:50,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:50,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:50,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:50,248 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 15:27:50,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:50,482 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-12 15:27:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:27:50,483 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 15:27:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:50,486 INFO L225 Difference]: With dead ends: 3386 [2021-06-12 15:27:50,486 INFO L226 Difference]: Without dead ends: 3116 [2021-06-12 15:27:50,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:27:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-12 15:27:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-12 15:27:50,504 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 15:27:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-12 15:27:50,506 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-12 15:27:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:50,506 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-12 15:27:50,506 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 15:27:50,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-12 15:27:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:50,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:50,508 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 15:27:50,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-12 15:27:50,708 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:50,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2037093005, now seen corresponding path program 63 times [2021-06-12 15:27:50,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:50,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801887071] [2021-06-12 15:27:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:50,844 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 15:27:50,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:50,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801887071] [2021-06-12 15:27:50,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801887071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:50,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701249018] [2021-06-12 15:27:50,845 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 15:27:50,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:27:50,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:51,054 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 15:27:51,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701249018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:51,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:51,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:27:51,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240448298] [2021-06-12 15:27:51,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:51,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:51,055 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 15:27:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:51,369 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-12 15:27:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:51,370 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 15:27:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:51,372 INFO L225 Difference]: With dead ends: 3346 [2021-06-12 15:27:51,372 INFO L226 Difference]: Without dead ends: 3076 [2021-06-12 15:27:51,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:27:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-12 15:27:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-12 15:27:51,402 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 15:27:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-12 15:27:51,404 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-12 15:27:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:51,405 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-12 15:27:51,405 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 15:27:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-12 15:27:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:51,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:51,407 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 15:27:51,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:51,625 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:51,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1159081087, now seen corresponding path program 64 times [2021-06-12 15:27:51,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:51,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010620636] [2021-06-12 15:27:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:51,752 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 15:27:51,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:51,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010620636] [2021-06-12 15:27:51,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010620636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:51,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145703545] [2021-06-12 15:27:51,753 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 15:27:51,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:51,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:51,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:51,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:51,948 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 15:27:51,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145703545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:51,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:51,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:27:51,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900798401] [2021-06-12 15:27:51,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:51,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:51,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:51,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:51,949 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 15:27:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:52,202 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-12 15:27:52,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:27:52,203 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 15:27:52,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:52,206 INFO L225 Difference]: With dead ends: 3396 [2021-06-12 15:27:52,206 INFO L226 Difference]: Without dead ends: 3126 [2021-06-12 15:27:52,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:27:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-12 15:27:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-12 15:27:52,227 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 15:27:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-12 15:27:52,229 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-12 15:27:52,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:52,230 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-12 15:27:52,230 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 15:27:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-12 15:27:52,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:52,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:52,232 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 15:27:52,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:52,433 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2059135887, now seen corresponding path program 65 times [2021-06-12 15:27:52,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:52,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48309292] [2021-06-12 15:27:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:52,558 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 15:27:52,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:52,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48309292] [2021-06-12 15:27:52,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48309292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:52,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630006437] [2021-06-12 15:27:52,558 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 15:27:52,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:27:52,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:52,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:52,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:52,747 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 15:27:52,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630006437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:52,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:52,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:27:52,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640158957] [2021-06-12 15:27:52,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:52,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:52,748 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 15:27:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:53,089 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-12 15:27:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:27:53,090 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 15:27:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:53,092 INFO L225 Difference]: With dead ends: 3421 [2021-06-12 15:27:53,092 INFO L226 Difference]: Without dead ends: 3151 [2021-06-12 15:27:53,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-12 15:27:53,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-12 15:27:53,131 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 15:27:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-12 15:27:53,134 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-12 15:27:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:53,134 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-12 15:27:53,134 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 15:27:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-12 15:27:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:53,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:53,136 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 15:27:53,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 15:27:53,336 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1806767103, now seen corresponding path program 66 times [2021-06-12 15:27:53,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:53,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731479393] [2021-06-12 15:27:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:53,462 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 15:27:53,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:53,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731479393] [2021-06-12 15:27:53,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731479393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:53,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776162930] [2021-06-12 15:27:53,462 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 15:27:53,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:27:53,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:53,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:53,649 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 15:27:53,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776162930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:53,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:53,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:27:53,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496061390] [2021-06-12 15:27:53,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:53,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:53,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:53,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:53,651 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 15:27:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:53,960 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-12 15:27:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:27:53,960 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 15:27:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:53,964 INFO L225 Difference]: With dead ends: 3446 [2021-06-12 15:27:53,964 INFO L226 Difference]: Without dead ends: 3176 [2021-06-12 15:27:53,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:27:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-12 15:27:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-12 15:27:53,986 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 15:27:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-12 15:27:53,989 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-12 15:27:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:53,989 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-12 15:27:53,989 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 15:27:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-12 15:27:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:53,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:53,991 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 15:27:54,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:54,192 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:54,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1120583919, now seen corresponding path program 67 times [2021-06-12 15:27:54,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:54,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290658370] [2021-06-12 15:27:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:54,327 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 15:27:54,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:54,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290658370] [2021-06-12 15:27:54,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290658370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:54,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098201661] [2021-06-12 15:27:54,328 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 15:27:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:54,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:54,506 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 15:27:54,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098201661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:54,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:54,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:27:54,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343976933] [2021-06-12 15:27:54,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:54,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:54,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:54,507 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 15:27:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:54,925 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-12 15:27:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:54,925 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 15:27:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:54,928 INFO L225 Difference]: With dead ends: 3471 [2021-06-12 15:27:54,928 INFO L226 Difference]: Without dead ends: 3201 [2021-06-12 15:27:54,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:27:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-12 15:27:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-12 15:27:54,949 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 15:27:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-12 15:27:54,951 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-12 15:27:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:54,951 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-12 15:27:54,951 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 15:27:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-12 15:27:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:54,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:54,954 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 15:27:55,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 15:27:55,176 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1035549181, now seen corresponding path program 68 times [2021-06-12 15:27:55,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:55,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799286370] [2021-06-12 15:27:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:55,289 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 15:27:55,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:55,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799286370] [2021-06-12 15:27:55,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799286370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:55,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791656229] [2021-06-12 15:27:55,290 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 15:27:55,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:55,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:55,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:55,455 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 15:27:55,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791656229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:55,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:55,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:27:55,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104700414] [2021-06-12 15:27:55,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:55,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:55,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:55,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:55,457 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 15:27:55,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:55,782 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-12 15:27:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:55,783 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 15:27:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:55,786 INFO L225 Difference]: With dead ends: 3496 [2021-06-12 15:27:55,786 INFO L226 Difference]: Without dead ends: 3226 [2021-06-12 15:27:55,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:27:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-12 15:27:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-12 15:27:55,808 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 15:27:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-12 15:27:55,811 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-12 15:27:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:55,811 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-12 15:27:55,811 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 15:27:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-12 15:27:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:55,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:55,813 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 15:27:56,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:56,014 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash 967398125, now seen corresponding path program 69 times [2021-06-12 15:27:56,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:56,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232075693] [2021-06-12 15:27:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:56,145 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 15:27:56,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:56,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232075693] [2021-06-12 15:27:56,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232075693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:56,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759997267] [2021-06-12 15:27:56,146 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 15:27:56,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:27:56,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:56,364 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 15:27:56,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759997267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:56,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:56,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:27:56,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376930240] [2021-06-12 15:27:56,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:56,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:56,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:56,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:56,366 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 15:27:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:56,840 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-12 15:27:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:27:56,840 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 15:27:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:56,843 INFO L225 Difference]: With dead ends: 3521 [2021-06-12 15:27:56,843 INFO L226 Difference]: Without dead ends: 3251 [2021-06-12 15:27:56,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 449.7ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:27:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-12 15:27:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-12 15:27:56,866 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 15:27:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-12 15:27:56,869 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-12 15:27:56,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:56,869 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-12 15:27:56,869 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 15:27:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-12 15:27:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:56,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:56,871 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 15:27:57,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 15:27:57,071 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:57,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:57,072 INFO L82 PathProgramCache]: Analyzing trace with hash -329570949, now seen corresponding path program 70 times [2021-06-12 15:27:57,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:57,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13515772] [2021-06-12 15:27:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:57,174 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 15:27:57,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:57,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13515772] [2021-06-12 15:27:57,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13515772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:57,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144483411] [2021-06-12 15:27:57,175 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 15:27:57,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:57,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:57,338 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 15:27:57,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144483411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:57,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:57,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:27:57,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474829428] [2021-06-12 15:27:57,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:57,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:57,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:57,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:57,339 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 15:27:57,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:57,698 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-12 15:27:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:27:57,698 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 15:27:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:57,702 INFO L225 Difference]: With dead ends: 3591 [2021-06-12 15:27:57,702 INFO L226 Difference]: Without dead ends: 3321 [2021-06-12 15:27:57,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:27:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-12 15:27:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-12 15:27:57,726 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 15:27:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-12 15:27:57,729 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-12 15:27:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:57,729 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-12 15:27:57,729 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 15:27:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-12 15:27:57,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:57,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:57,731 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 15:27:57,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:57,933 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:57,933 INFO L82 PathProgramCache]: Analyzing trace with hash 100182635, now seen corresponding path program 71 times [2021-06-12 15:27:57,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:57,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983706674] [2021-06-12 15:27:57,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:58,040 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 15:27:58,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:58,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983706674] [2021-06-12 15:27:58,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983706674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:58,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144141620] [2021-06-12 15:27:58,041 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 15:27:58,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:27:58,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:58,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:58,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:58,258 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 15:27:58,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144141620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:58,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:58,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:27:58,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441509675] [2021-06-12 15:27:58,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:27:58,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:58,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:27:58,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:27:58,260 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 15:27:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:58,812 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-12 15:27:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:27:58,812 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 15:27:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:58,816 INFO L225 Difference]: With dead ends: 4169 [2021-06-12 15:27:58,816 INFO L226 Difference]: Without dead ends: 3546 [2021-06-12 15:27:58,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 499.4ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:27:58,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-12 15:27:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-12 15:27:58,838 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 15:27:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-12 15:27:58,841 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-12 15:27:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:58,841 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-12 15:27:58,841 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 15:27:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-12 15:27:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:58,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:58,843 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 15:27:59,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 15:27:59,044 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:59,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:59,044 INFO L82 PathProgramCache]: Analyzing trace with hash 42448505, now seen corresponding path program 72 times [2021-06-12 15:27:59,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:59,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909648071] [2021-06-12 15:27:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:59,144 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 15:27:59,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:59,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909648071] [2021-06-12 15:27:59,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909648071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:59,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366120338] [2021-06-12 15:27:59,144 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 15:27:59,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:27:59,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:59,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:27:59,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:59,330 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 15:27:59,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366120338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:59,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:59,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:27:59,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790949926] [2021-06-12 15:27:59,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:27:59,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:59,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:27:59,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:27:59,331 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 15:27:59,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:59,794 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-12 15:27:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:27:59,794 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 15:27:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:59,798 INFO L225 Difference]: With dead ends: 4398 [2021-06-12 15:27:59,798 INFO L226 Difference]: Without dead ends: 4128 [2021-06-12 15:27:59,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:27:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-12 15:27:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-12 15:27:59,844 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 15:27:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-12 15:27:59,848 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-12 15:27:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:59,848 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-12 15:27:59,848 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 15:27:59,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-12 15:27:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:27:59,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:59,850 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 15:28:00,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:00,056 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:00,056 INFO L82 PathProgramCache]: Analyzing trace with hash 64791755, now seen corresponding path program 73 times [2021-06-12 15:28:00,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:00,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208475192] [2021-06-12 15:28:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:00,158 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 15:28:00,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:00,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208475192] [2021-06-12 15:28:00,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208475192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:00,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759508078] [2021-06-12 15:28:00,158 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 15:28:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:00,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:28:00,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:00,353 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 15:28:00,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759508078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:00,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:00,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:28:00,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503806350] [2021-06-12 15:28:00,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:00,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:00,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:00,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:00,355 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 15:28:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:00,878 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-12 15:28:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:00,879 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 15:28:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:00,882 INFO L225 Difference]: With dead ends: 3885 [2021-06-12 15:28:00,882 INFO L226 Difference]: Without dead ends: 3306 [2021-06-12 15:28:00,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-12 15:28:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-12 15:28:00,901 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 15:28:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-12 15:28:00,903 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-12 15:28:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:00,903 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-12 15:28:00,903 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 15:28:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-12 15:28:00,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:00,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:00,905 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 15:28:01,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:01,106 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:01,106 INFO L82 PathProgramCache]: Analyzing trace with hash -472912364, now seen corresponding path program 74 times [2021-06-12 15:28:01,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:01,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192282465] [2021-06-12 15:28:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:01,258 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 15:28:01,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:01,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192282465] [2021-06-12 15:28:01,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192282465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:01,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613704597] [2021-06-12 15:28:01,259 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 15:28:01,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:01,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:01,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:01,477 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 15:28:01,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613704597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:01,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:01,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:01,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575804767] [2021-06-12 15:28:01,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:01,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:01,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:01,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:01,479 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 15:28:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:01,800 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-12 15:28:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:28:01,800 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 15:28:01,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:01,802 INFO L225 Difference]: With dead ends: 3131 [2021-06-12 15:28:01,802 INFO L226 Difference]: Without dead ends: 2861 [2021-06-12 15:28:01,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:28:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-12 15:28:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-12 15:28:01,822 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 15:28:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-12 15:28:01,825 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-12 15:28:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:01,825 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-12 15:28:01,825 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 15:28:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-12 15:28:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:01,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:01,826 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 15:28:02,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:02,027 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:02,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:02,027 INFO L82 PathProgramCache]: Analyzing trace with hash -926825724, now seen corresponding path program 75 times [2021-06-12 15:28:02,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:02,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607689222] [2021-06-12 15:28:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:02,172 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 15:28:02,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:02,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607689222] [2021-06-12 15:28:02,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607689222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:02,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903769235] [2021-06-12 15:28:02,172 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 15:28:02,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:28:02,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:02,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:02,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:02,370 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 15:28:02,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903769235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:02,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:02,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:02,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258782244] [2021-06-12 15:28:02,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:02,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:02,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:02,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:02,371 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 15:28:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:02,683 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-12 15:28:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:28:02,683 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 15:28:02,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:02,686 INFO L225 Difference]: With dead ends: 3451 [2021-06-12 15:28:02,686 INFO L226 Difference]: Without dead ends: 3181 [2021-06-12 15:28:02,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:28:02,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-12 15:28:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-12 15:28:02,704 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 15:28:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-12 15:28:02,707 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-12 15:28:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:02,707 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-12 15:28:02,707 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 15:28:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-12 15:28:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:02,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:02,709 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 15:28:02,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:02,909 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:02,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:02,910 INFO L82 PathProgramCache]: Analyzing trace with hash -48813806, now seen corresponding path program 76 times [2021-06-12 15:28:02,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:02,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271993821] [2021-06-12 15:28:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:03,050 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 15:28:03,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271993821] [2021-06-12 15:28:03,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271993821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092044019] [2021-06-12 15:28:03,051 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 15:28:03,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:03,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:03,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:03,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:03,228 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 15:28:03,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092044019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:03,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:03,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:03,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844310848] [2021-06-12 15:28:03,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:03,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:03,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:03,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:03,230 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 15:28:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:03,581 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-12 15:28:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:28:03,581 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 15:28:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:03,584 INFO L225 Difference]: With dead ends: 3481 [2021-06-12 15:28:03,584 INFO L226 Difference]: Without dead ends: 3211 [2021-06-12 15:28:03,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:28:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-12 15:28:03,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-12 15:28:03,605 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 15:28:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-12 15:28:03,607 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-12 15:28:03,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:03,607 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-12 15:28:03,607 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 15:28:03,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-12 15:28:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:03,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:03,609 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 15:28:03,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:03,811 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:03,811 INFO L82 PathProgramCache]: Analyzing trace with hash -948868606, now seen corresponding path program 77 times [2021-06-12 15:28:03,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:03,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211001686] [2021-06-12 15:28:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:03,962 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 15:28:03,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:03,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211001686] [2021-06-12 15:28:03,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211001686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:03,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903150624] [2021-06-12 15:28:03,963 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 15:28:04,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:28:04,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:04,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:04,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:04,173 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 15:28:04,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903150624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:04,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:04,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:04,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071547140] [2021-06-12 15:28:04,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:04,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:04,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:04,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:04,174 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 15:28:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:04,550 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-12 15:28:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:04,551 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 15:28:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:04,554 INFO L225 Difference]: With dead ends: 3506 [2021-06-12 15:28:04,554 INFO L226 Difference]: Without dead ends: 3236 [2021-06-12 15:28:04,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:28:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-12 15:28:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-12 15:28:04,575 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 15:28:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-12 15:28:04,577 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-12 15:28:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:04,578 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-12 15:28:04,578 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 15:28:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-12 15:28:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:04,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:04,580 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 15:28:04,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:04,780 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:04,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1377932912, now seen corresponding path program 78 times [2021-06-12 15:28:04,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:04,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342127381] [2021-06-12 15:28:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:04,923 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 15:28:04,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:04,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342127381] [2021-06-12 15:28:04,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342127381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:04,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077166338] [2021-06-12 15:28:04,923 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 15:28:04,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:28:04,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:04,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:05,145 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 15:28:05,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077166338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:05,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:05,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:05,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033478788] [2021-06-12 15:28:05,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:05,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:05,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:05,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:05,147 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 15:28:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:05,505 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-12 15:28:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:28:05,506 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 15:28:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:05,509 INFO L225 Difference]: With dead ends: 3531 [2021-06-12 15:28:05,509 INFO L226 Difference]: Without dead ends: 3261 [2021-06-12 15:28:05,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:28:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-12 15:28:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-12 15:28:05,536 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 15:28:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-12 15:28:05,539 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-12 15:28:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:05,539 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-12 15:28:05,539 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 15:28:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-12 15:28:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:05,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:05,541 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 15:28:05,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:05,742 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:05,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2064116096, now seen corresponding path program 79 times [2021-06-12 15:28:05,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:05,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957329728] [2021-06-12 15:28:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:05,874 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 15:28:05,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:05,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957329728] [2021-06-12 15:28:05,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957329728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:05,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257256978] [2021-06-12 15:28:05,875 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 15:28:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:06,069 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 15:28:06,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257256978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:06,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:06,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:06,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127118113] [2021-06-12 15:28:06,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:06,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:06,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:06,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:06,071 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 15:28:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:06,506 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-12 15:28:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:06,506 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 15:28:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:06,509 INFO L225 Difference]: With dead ends: 3556 [2021-06-12 15:28:06,509 INFO L226 Difference]: Without dead ends: 3286 [2021-06-12 15:28:06,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 415.7ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:28:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-12 15:28:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-12 15:28:06,531 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 15:28:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-12 15:28:06,534 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-12 15:28:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:06,534 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-12 15:28:06,534 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 15:28:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-12 15:28:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:06,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:06,536 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 15:28:06,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 15:28:06,736 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2145816462, now seen corresponding path program 80 times [2021-06-12 15:28:06,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:06,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746672471] [2021-06-12 15:28:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:06,876 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 15:28:06,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:06,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746672471] [2021-06-12 15:28:06,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746672471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:06,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092545274] [2021-06-12 15:28:06,876 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 15:28:06,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:07,080 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 15:28:07,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092545274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:07,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:07,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:07,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291194492] [2021-06-12 15:28:07,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:07,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:07,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:07,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:07,081 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 15:28:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:07,451 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-12 15:28:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:07,451 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 15:28:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:07,454 INFO L225 Difference]: With dead ends: 3581 [2021-06-12 15:28:07,454 INFO L226 Difference]: Without dead ends: 3311 [2021-06-12 15:28:07,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:28:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-12 15:28:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-12 15:28:07,476 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 15:28:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-12 15:28:07,479 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-12 15:28:07,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:07,479 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-12 15:28:07,479 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 15:28:07,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-12 15:28:07,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:07,481 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:07,481 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 15:28:07,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:07,682 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2077665406, now seen corresponding path program 81 times [2021-06-12 15:28:07,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:07,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944301584] [2021-06-12 15:28:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:07,812 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 15:28:07,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944301584] [2021-06-12 15:28:07,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944301584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275470033] [2021-06-12 15:28:07,813 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 15:28:07,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:28:07,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:07,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:07,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:08,014 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 15:28:08,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275470033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:08,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:08,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:08,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644998454] [2021-06-12 15:28:08,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:08,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:08,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:08,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:08,016 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 15:28:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:08,520 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-12 15:28:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:08,521 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 15:28:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:08,523 INFO L225 Difference]: With dead ends: 3606 [2021-06-12 15:28:08,523 INFO L226 Difference]: Without dead ends: 3336 [2021-06-12 15:28:08,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:28:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-12 15:28:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-12 15:28:08,546 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 15:28:08,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-12 15:28:08,549 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-12 15:28:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:08,549 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-12 15:28:08,549 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 15:28:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-12 15:28:08,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:08,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:08,551 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 15:28:08,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 15:28:08,752 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:08,752 INFO L82 PathProgramCache]: Analyzing trace with hash 780696332, now seen corresponding path program 82 times [2021-06-12 15:28:08,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:08,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341600809] [2021-06-12 15:28:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:08,866 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 15:28:08,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:08,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341600809] [2021-06-12 15:28:08,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341600809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:08,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850007018] [2021-06-12 15:28:08,867 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 15:28:08,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:08,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:08,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:08,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:09,037 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 15:28:09,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850007018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:09,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:09,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:09,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696257296] [2021-06-12 15:28:09,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:09,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:09,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:09,038 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 15:28:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:09,448 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-12 15:28:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:09,449 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 15:28:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:09,452 INFO L225 Difference]: With dead ends: 3631 [2021-06-12 15:28:09,452 INFO L226 Difference]: Without dead ends: 3361 [2021-06-12 15:28:09,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:28:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-12 15:28:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-12 15:28:09,478 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 15:28:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-12 15:28:09,481 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-12 15:28:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:09,481 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-12 15:28:09,481 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 15:28:09,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-12 15:28:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:09,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:09,483 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 15:28:09,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:09,684 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1210449916, now seen corresponding path program 83 times [2021-06-12 15:28:09,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:09,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947165870] [2021-06-12 15:28:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:09,804 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 15:28:09,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:09,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947165870] [2021-06-12 15:28:09,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947165870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:09,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414744380] [2021-06-12 15:28:09,804 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 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 15:28:09,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:28:09,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:09,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:09,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:10,009 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 15:28:10,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414744380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:10,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:10,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:10,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477966449] [2021-06-12 15:28:10,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:10,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:10,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:10,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:10,010 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 15:28:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:10,556 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-12 15:28:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:28:10,557 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 15:28:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:10,560 INFO L225 Difference]: With dead ends: 3716 [2021-06-12 15:28:10,560 INFO L226 Difference]: Without dead ends: 3446 [2021-06-12 15:28:10,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:28:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-12 15:28:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-12 15:28:10,585 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 15:28:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-12 15:28:10,588 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-12 15:28:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:10,588 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-12 15:28:10,588 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 15:28:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-12 15:28:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:10,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:10,590 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 15:28:10,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:10,791 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1152715786, now seen corresponding path program 84 times [2021-06-12 15:28:10,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:10,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502861325] [2021-06-12 15:28:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:10,912 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 15:28:10,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:10,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502861325] [2021-06-12 15:28:10,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502861325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:10,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424428675] [2021-06-12 15:28:10,912 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 15:28:10,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:28:10,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:10,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:11,105 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 15:28:11,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424428675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:11,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:11,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:28:11,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695354824] [2021-06-12 15:28:11,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:28:11,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:11,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:28:11,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:28:11,106 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 15:28:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:11,539 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-12 15:28:11,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:11,539 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 15:28:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:11,543 INFO L225 Difference]: With dead ends: 4458 [2021-06-12 15:28:11,543 INFO L226 Difference]: Without dead ends: 4188 [2021-06-12 15:28:11,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:28:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-12 15:28:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-12 15:28:11,584 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 15:28:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-12 15:28:11,588 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-12 15:28:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:11,588 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-12 15:28:11,588 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 15:28:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-12 15:28:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:28:11,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:11,590 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 15:28:11,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:11,791 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1175059036, now seen corresponding path program 85 times [2021-06-12 15:28:11,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:11,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496707731] [2021-06-12 15:28:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:11,906 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 15:28:11,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:11,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496707731] [2021-06-12 15:28:11,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496707731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:11,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930444441] [2021-06-12 15:28:11,906 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 15:28:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:28:11,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:12,081 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 15:28:12,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930444441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:12,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:12,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:28:12,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433536426] [2021-06-12 15:28:12,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:12,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:12,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:12,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:12,082 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 15:28:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:12,623 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-12 15:28:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:12,623 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 15:28:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:12,626 INFO L225 Difference]: With dead ends: 3920 [2021-06-12 15:28:12,626 INFO L226 Difference]: Without dead ends: 3431 [2021-06-12 15:28:12,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:28:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-12 15:28:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-12 15:28:12,644 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 15:28:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-12 15:28:12,647 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-12 15:28:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:12,647 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-12 15:28:12,647 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 15:28:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-12 15:28:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:12,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:12,648 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 15:28:12,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:12,849 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2003017648, now seen corresponding path program 86 times [2021-06-12 15:28:12,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:12,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160323458] [2021-06-12 15:28:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:13,015 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 15:28:13,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:13,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160323458] [2021-06-12 15:28:13,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160323458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:13,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898620538] [2021-06-12 15:28:13,015 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 15:28:13,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:13,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:13,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:13,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:13,246 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 15:28:13,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898620538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:13,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:13,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:13,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330376891] [2021-06-12 15:28:13,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:13,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:13,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:13,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:13,247 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 15:28:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:13,580 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-12 15:28:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:28:13,580 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 15:28:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:13,583 INFO L225 Difference]: With dead ends: 3024 [2021-06-12 15:28:13,583 INFO L226 Difference]: Without dead ends: 2690 [2021-06-12 15:28:13,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:28:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-12 15:28:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-12 15:28:13,599 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 15:28:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-12 15:28:13,601 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-12 15:28:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:13,601 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-12 15:28:13,601 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 15:28:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-12 15:28:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:13,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:13,603 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 15:28:13,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:13,803 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash 381501940, now seen corresponding path program 87 times [2021-06-12 15:28:13,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:13,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554405523] [2021-06-12 15:28:13,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:13,964 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 15:28:13,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:13,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554405523] [2021-06-12 15:28:13,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554405523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:13,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004803591] [2021-06-12 15:28:13,965 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 15:28:14,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:28:14,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:14,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:14,152 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 15:28:14,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004803591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:14,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:14,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:14,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132322924] [2021-06-12 15:28:14,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:14,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:14,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:14,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:14,153 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 15:28:14,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:14,412 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-12 15:28:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:28:14,412 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 15:28:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:14,415 INFO L225 Difference]: With dead ends: 3646 [2021-06-12 15:28:14,415 INFO L226 Difference]: Without dead ends: 3376 [2021-06-12 15:28:14,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:28:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-12 15:28:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-12 15:28:14,434 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 15:28:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-12 15:28:14,436 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-12 15:28:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:14,436 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-12 15:28:14,436 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 15:28:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-12 15:28:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:14,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:14,438 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 15:28:14,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:14,648 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:14,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:14,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1021160164, now seen corresponding path program 88 times [2021-06-12 15:28:14,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:14,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409980471] [2021-06-12 15:28:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:14,812 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 15:28:14,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:14,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409980471] [2021-06-12 15:28:14,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409980471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:14,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790059666] [2021-06-12 15:28:14,813 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 15:28:14,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:14,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:14,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:14,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:15,024 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 15:28:15,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790059666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:15,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:15,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:15,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340087864] [2021-06-12 15:28:15,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:15,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:15,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:15,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:15,025 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 15:28:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:15,352 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-12 15:28:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:28:15,352 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 15:28:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:15,356 INFO L225 Difference]: With dead ends: 3606 [2021-06-12 15:28:15,356 INFO L226 Difference]: Without dead ends: 3336 [2021-06-12 15:28:15,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 367.5ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:28:15,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-12 15:28:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-12 15:28:15,383 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 15:28:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-12 15:28:15,386 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-12 15:28:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:15,386 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-12 15:28:15,386 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 15:28:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-12 15:28:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:15,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:15,388 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 15:28:15,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 15:28:15,588 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:15,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:15,589 INFO L82 PathProgramCache]: Analyzing trace with hash 246241138, now seen corresponding path program 89 times [2021-06-12 15:28:15,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:15,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316669537] [2021-06-12 15:28:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:15,744 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 15:28:15,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316669537] [2021-06-12 15:28:15,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316669537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988790235] [2021-06-12 15:28:15,745 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 15:28:15,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:28:15,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:15,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:15,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:15,926 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 15:28:15,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988790235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:15,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:15,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:15,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156990127] [2021-06-12 15:28:15,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:15,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:15,928 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 15:28:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:16,224 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-12 15:28:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:28:16,224 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 15:28:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:16,227 INFO L225 Difference]: With dead ends: 3656 [2021-06-12 15:28:16,227 INFO L226 Difference]: Without dead ends: 3386 [2021-06-12 15:28:16,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:28:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-12 15:28:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-12 15:28:16,247 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 15:28:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-12 15:28:16,249 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-12 15:28:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:16,250 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-12 15:28:16,250 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 15:28:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-12 15:28:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:16,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:16,251 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 15:28:16,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:16,453 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash -207672222, now seen corresponding path program 90 times [2021-06-12 15:28:16,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:16,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823302610] [2021-06-12 15:28:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:16,642 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 15:28:16,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:16,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823302610] [2021-06-12 15:28:16,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823302610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:16,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555919959] [2021-06-12 15:28:16,644 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 15:28:16,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:28:16,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:16,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:16,884 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 15:28:16,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555919959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:16,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:16,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:16,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269337885] [2021-06-12 15:28:16,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:16,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:16,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:16,886 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 15:28:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:17,273 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-12 15:28:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:17,274 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 15:28:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:17,277 INFO L225 Difference]: With dead ends: 3681 [2021-06-12 15:28:17,277 INFO L226 Difference]: Without dead ends: 3411 [2021-06-12 15:28:17,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:28:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-12 15:28:17,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-12 15:28:17,298 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 15:28:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-12 15:28:17,301 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-12 15:28:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:17,301 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-12 15:28:17,301 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 15:28:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-12 15:28:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:17,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:17,303 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 15:28:17,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-12 15:28:17,503 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:17,504 INFO L82 PathProgramCache]: Analyzing trace with hash 670339696, now seen corresponding path program 91 times [2021-06-12 15:28:17,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:17,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132759471] [2021-06-12 15:28:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:17,641 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 15:28:17,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:17,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132759471] [2021-06-12 15:28:17,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132759471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:17,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800150845] [2021-06-12 15:28:17,642 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 15:28:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:17,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:17,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:17,834 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 15:28:17,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800150845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:17,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:17,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:17,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810157988] [2021-06-12 15:28:17,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:17,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:17,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:17,836 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 15:28:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:18,187 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-12 15:28:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:28:18,188 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 15:28:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:18,191 INFO L225 Difference]: With dead ends: 3706 [2021-06-12 15:28:18,191 INFO L226 Difference]: Without dead ends: 3436 [2021-06-12 15:28:18,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:28:18,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-12 15:28:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-12 15:28:18,213 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 15:28:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-12 15:28:18,216 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-12 15:28:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:18,216 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-12 15:28:18,216 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 15:28:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-12 15:28:18,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:18,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:18,218 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 15:28:18,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:18,419 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:18,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:18,419 INFO L82 PathProgramCache]: Analyzing trace with hash -229715104, now seen corresponding path program 92 times [2021-06-12 15:28:18,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:18,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683380779] [2021-06-12 15:28:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:18,580 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 15:28:18,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:18,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683380779] [2021-06-12 15:28:18,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683380779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:18,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650711820] [2021-06-12 15:28:18,580 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 15:28:18,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:18,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:18,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:18,813 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 15:28:18,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650711820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:18,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:18,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073498543] [2021-06-12 15:28:18,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:18,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:18,814 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 15:28:19,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:19,250 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-12 15:28:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:19,251 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 15:28:19,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:19,254 INFO L225 Difference]: With dead ends: 3731 [2021-06-12 15:28:19,254 INFO L226 Difference]: Without dead ends: 3461 [2021-06-12 15:28:19,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:28:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-12 15:28:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-12 15:28:19,276 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 15:28:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-12 15:28:19,279 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-12 15:28:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:19,279 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-12 15:28:19,279 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 15:28:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-12 15:28:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:19,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:19,281 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 15:28:19,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 15:28:19,482 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash -658779410, now seen corresponding path program 93 times [2021-06-12 15:28:19,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:19,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50755736] [2021-06-12 15:28:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:19,616 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 15:28:19,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:19,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50755736] [2021-06-12 15:28:19,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50755736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:19,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927373894] [2021-06-12 15:28:19,617 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 15:28:19,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:28:19,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:19,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:19,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:19,827 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 15:28:19,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927373894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:19,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:19,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:19,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945326208] [2021-06-12 15:28:19,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:19,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:19,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:19,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:19,828 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 15:28:20,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:20,209 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-12 15:28:20,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:28:20,209 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 15:28:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:20,212 INFO L225 Difference]: With dead ends: 3756 [2021-06-12 15:28:20,212 INFO L226 Difference]: Without dead ends: 3486 [2021-06-12 15:28:20,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:28:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-12 15:28:20,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-12 15:28:20,236 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 15:28:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-12 15:28:20,239 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-12 15:28:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:20,239 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-12 15:28:20,240 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 15:28:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-12 15:28:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:20,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:20,242 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 15:28:20,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 15:28:20,442 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1344962594, now seen corresponding path program 94 times [2021-06-12 15:28:20,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:20,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770177705] [2021-06-12 15:28:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:20,590 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 15:28:20,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:20,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770177705] [2021-06-12 15:28:20,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770177705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:20,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136358372] [2021-06-12 15:28:20,590 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 15:28:20,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:20,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:20,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:20,780 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 15:28:20,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136358372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:20,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:20,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:20,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164923917] [2021-06-12 15:28:20,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:20,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:20,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:20,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:20,782 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 15:28:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:21,266 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-12 15:28:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:21,267 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 15:28:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:21,270 INFO L225 Difference]: With dead ends: 3781 [2021-06-12 15:28:21,270 INFO L226 Difference]: Without dead ends: 3511 [2021-06-12 15:28:21,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-12 15:28:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-12 15:28:21,307 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 15:28:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-12 15:28:21,310 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-12 15:28:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:21,310 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-12 15:28:21,310 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 15:28:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-12 15:28:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:21,312 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:21,312 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 15:28:21,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 15:28:21,513 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1429997332, now seen corresponding path program 95 times [2021-06-12 15:28:21,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:21,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837486517] [2021-06-12 15:28:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:21,647 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 15:28:21,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:21,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837486517] [2021-06-12 15:28:21,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837486517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:21,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860487271] [2021-06-12 15:28:21,647 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 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 15:28:21,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:28:21,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:21,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:21,849 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 15:28:21,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860487271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:21,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:21,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:21,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898014970] [2021-06-12 15:28:21,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:21,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:21,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:21,850 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 15:28:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:22,273 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-12 15:28:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:22,273 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 15:28:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:22,277 INFO L225 Difference]: With dead ends: 3806 [2021-06-12 15:28:22,277 INFO L226 Difference]: Without dead ends: 3536 [2021-06-12 15:28:22,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:28:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-12 15:28:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-12 15:28:22,303 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 15:28:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-12 15:28:22,306 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-12 15:28:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:22,306 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-12 15:28:22,306 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 15:28:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-12 15:28:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:22,308 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:22,308 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 15:28:22,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:22,509 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:22,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1498148388, now seen corresponding path program 96 times [2021-06-12 15:28:22,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:22,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663877528] [2021-06-12 15:28:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:22,643 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 15:28:22,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:22,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663877528] [2021-06-12 15:28:22,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663877528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:22,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938704868] [2021-06-12 15:28:22,643 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 15:28:22,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:28:22,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:22,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:22,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:22,838 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 15:28:22,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938704868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:22,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:22,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:22,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973894022] [2021-06-12 15:28:22,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:22,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:22,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:22,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:22,840 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 15:28:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:23,384 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-12 15:28:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:28:23,384 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 15:28:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:23,387 INFO L225 Difference]: With dead ends: 3831 [2021-06-12 15:28:23,387 INFO L226 Difference]: Without dead ends: 3561 [2021-06-12 15:28:23,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 520.0ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-12 15:28:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-12 15:28:23,412 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 15:28:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-12 15:28:23,416 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-12 15:28:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:23,416 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-12 15:28:23,416 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 15:28:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-12 15:28:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:23,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:23,418 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 15:28:23,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 15:28:23,618 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:23,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:23,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1499849834, now seen corresponding path program 97 times [2021-06-12 15:28:23,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:23,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436739399] [2021-06-12 15:28:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:23,748 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 15:28:23,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:23,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436739399] [2021-06-12 15:28:23,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436739399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:23,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061848138] [2021-06-12 15:28:23,749 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 15:28:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:23,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:23,932 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 15:28:23,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061848138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:23,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:23,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:23,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974505949] [2021-06-12 15:28:23,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:23,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:23,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:23,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:23,933 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 15:28:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:24,370 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-12 15:28:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:24,370 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 15:28:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:24,373 INFO L225 Difference]: With dead ends: 3856 [2021-06-12 15:28:24,374 INFO L226 Difference]: Without dead ends: 3586 [2021-06-12 15:28:24,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 412.3ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-12 15:28:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-12 15:28:24,417 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 15:28:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-12 15:28:24,420 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-12 15:28:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:24,420 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-12 15:28:24,420 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 15:28:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-12 15:28:24,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:24,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:24,423 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 15:28:24,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:24,629 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1929603418, now seen corresponding path program 98 times [2021-06-12 15:28:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:24,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51139614] [2021-06-12 15:28:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:24,758 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 15:28:24,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:24,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51139614] [2021-06-12 15:28:24,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51139614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:24,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213703752] [2021-06-12 15:28:24,759 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 15:28:24,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:24,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:24,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:24,947 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 15:28:24,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213703752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:24,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:24,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:28:24,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365048612] [2021-06-12 15:28:24,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:28:24,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:24,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:28:24,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:28:24,948 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 15:28:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:25,541 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-12 15:28:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:28:25,542 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 15:28:25,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:25,545 INFO L225 Difference]: With dead ends: 3941 [2021-06-12 15:28:25,545 INFO L226 Difference]: Without dead ends: 3671 [2021-06-12 15:28:25,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 556.6ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:28:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-12 15:28:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-12 15:28:25,573 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 15:28:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-12 15:28:25,576 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-12 15:28:25,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:25,576 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-12 15:28:25,576 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 15:28:25,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-12 15:28:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:25,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:25,579 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 15:28:25,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 15:28:25,780 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1871869288, now seen corresponding path program 99 times [2021-06-12 15:28:25,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:25,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265834109] [2021-06-12 15:28:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:25,909 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 15:28:25,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:25,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265834109] [2021-06-12 15:28:25,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265834109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:25,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567636791] [2021-06-12 15:28:25,910 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 15:28:25,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:28:25,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:25,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:25,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:26,104 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 15:28:26,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567636791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:26,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:26,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 15:28:26,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076146039] [2021-06-12 15:28:26,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:28:26,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:26,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:28:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:28:26,105 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 15:28:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:26,572 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-12 15:28:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:26,573 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 15:28:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:26,577 INFO L225 Difference]: With dead ends: 4708 [2021-06-12 15:28:26,577 INFO L226 Difference]: Without dead ends: 4438 [2021-06-12 15:28:26,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-12 15:28:26,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-12 15:28:26,605 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 15:28:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-12 15:28:26,609 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-12 15:28:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:26,609 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-12 15:28:26,609 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 15:28:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-12 15:28:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:28:26,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:26,611 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 15:28:26,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:26,812 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:26,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:26,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1894212538, now seen corresponding path program 100 times [2021-06-12 15:28:26,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:26,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325490516] [2021-06-12 15:28:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:26,933 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 15:28:26,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325490516] [2021-06-12 15:28:26,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325490516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224842692] [2021-06-12 15:28:26,933 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 15:28:26,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:26,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:26,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:28:26,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:27,126 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 15:28:27,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224842692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:27,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:27,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-12 15:28:27,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776781113] [2021-06-12 15:28:27,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:27,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:27,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:27,127 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 15:28:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:27,830 INFO L93 Difference]: Finished difference Result 4651 states and 12541 transitions. [2021-06-12 15:28:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:28:27,830 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 15:28:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:27,833 INFO L225 Difference]: With dead ends: 4651 [2021-06-12 15:28:27,833 INFO L226 Difference]: Without dead ends: 4076 [2021-06-12 15:28:27,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 654.5ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:28:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-12 15:28:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-12 15:28:27,860 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 15:28:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:27,864 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-06-12 15:28:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:27,864 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:27,864 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 15:28:27,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:27,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:27,866 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 15:28:28,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:28,067 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1987209659, now seen corresponding path program 101 times [2021-06-12 15:28:28,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:28,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067616621] [2021-06-12 15:28:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:28,224 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 15:28:28,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:28,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067616621] [2021-06-12 15:28:28,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067616621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:28,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429981043] [2021-06-12 15:28:28,224 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 15:28:28,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:28:28,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:28,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:28,430 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 15:28:28,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429981043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:28,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:28,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:28,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6606286] [2021-06-12 15:28:28,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:28,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:28,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:28,431 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 15:28:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:28,749 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-12 15:28:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:28:28,750 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 15:28:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:28,754 INFO L225 Difference]: With dead ends: 4346 [2021-06-12 15:28:28,754 INFO L226 Difference]: Without dead ends: 4076 [2021-06-12 15:28:28,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:28:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-12 15:28:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-12 15:28:28,781 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 15:28:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:28,785 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:28,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:28,785 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:28,785 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 15:28:28,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:28,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:28,787 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 15:28:28,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-12 15:28:28,988 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1347551435, now seen corresponding path program 102 times [2021-06-12 15:28:28,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:28,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324909881] [2021-06-12 15:28:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:29,177 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 15:28:29,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:29,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324909881] [2021-06-12 15:28:29,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324909881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:29,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809836453] [2021-06-12 15:28:29,177 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 15:28:29,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:28:29,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:29,469 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 15:28:29,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809836453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:29,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:29,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:29,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567679478] [2021-06-12 15:28:29,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:29,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:29,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:29,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:29,471 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 15:28:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:29,846 INFO L93 Difference]: Finished difference Result 4641 states and 12087 transitions. [2021-06-12 15:28:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:29,847 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 15:28:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:29,850 INFO L225 Difference]: With dead ends: 4641 [2021-06-12 15:28:29,850 INFO L226 Difference]: Without dead ends: 4371 [2021-06-12 15:28:29,851 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:28:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-06-12 15:28:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-06-12 15:28:29,877 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 15:28:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:29,880 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:29,880 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:29,880 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 15:28:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:29,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:29,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:29,883 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 15:28:30,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:30,083 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:30,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2122470461, now seen corresponding path program 103 times [2021-06-12 15:28:30,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:30,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528916116] [2021-06-12 15:28:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:30,245 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 15:28:30,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:30,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528916116] [2021-06-12 15:28:30,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528916116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:30,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609985603] [2021-06-12 15:28:30,246 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 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 15:28:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:30,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:30,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:30,446 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 15:28:30,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609985603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:30,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:30,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:30,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740984199] [2021-06-12 15:28:30,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:30,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:30,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:30,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:30,447 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 15:28:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:30,806 INFO L93 Difference]: Finished difference Result 4596 states and 11997 transitions. [2021-06-12 15:28:30,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:28:30,807 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 15:28:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:30,810 INFO L225 Difference]: With dead ends: 4596 [2021-06-12 15:28:30,810 INFO L226 Difference]: Without dead ends: 4326 [2021-06-12 15:28:30,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 378.6ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:28:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-12 15:28:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-06-12 15:28:30,835 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 15:28:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:30,839 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:30,839 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:30,839 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 15:28:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:30,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:30,841 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 15:28:31,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:31,042 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1718583475, now seen corresponding path program 104 times [2021-06-12 15:28:31,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:31,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584992535] [2021-06-12 15:28:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:31,208 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 15:28:31,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:31,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584992535] [2021-06-12 15:28:31,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584992535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:31,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739791825] [2021-06-12 15:28:31,208 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 15:28:31,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:31,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:31,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:31,422 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 15:28:31,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739791825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:31,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:31,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:31,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938099391] [2021-06-12 15:28:31,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:31,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:31,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:31,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:31,423 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 15:28:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:31,848 INFO L93 Difference]: Finished difference Result 4546 states and 11897 transitions. [2021-06-12 15:28:31,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:31,848 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 15:28:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:31,852 INFO L225 Difference]: With dead ends: 4546 [2021-06-12 15:28:31,852 INFO L226 Difference]: Without dead ends: 4276 [2021-06-12 15:28:31,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:31,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-12 15:28:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-06-12 15:28:31,878 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 15:28:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:31,882 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:31,882 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:31,882 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 15:28:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:31,884 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:31,884 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 15:28:32,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 15:28:32,084 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1698371903, now seen corresponding path program 105 times [2021-06-12 15:28:32,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:32,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062127131] [2021-06-12 15:28:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:32,256 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 15:28:32,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:32,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062127131] [2021-06-12 15:28:32,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062127131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:32,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464515521] [2021-06-12 15:28:32,257 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 15:28:32,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:28:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:32,535 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 15:28:32,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464515521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:32,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:32,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:32,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541109956] [2021-06-12 15:28:32,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:32,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:32,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:32,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:32,537 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 15:28:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:32,930 INFO L93 Difference]: Finished difference Result 4496 states and 11797 transitions. [2021-06-12 15:28:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:32,930 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 15:28:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:32,934 INFO L225 Difference]: With dead ends: 4496 [2021-06-12 15:28:32,934 INFO L226 Difference]: Without dead ends: 4226 [2021-06-12 15:28:32,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-12 15:28:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-06-12 15:28:32,959 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 15:28:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:32,963 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:32,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:32,963 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:32,963 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 15:28:32,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:32,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:32,965 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 15:28:33,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 15:28:33,166 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:33,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1696540593, now seen corresponding path program 106 times [2021-06-12 15:28:33,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:33,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24376588] [2021-06-12 15:28:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:33,348 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 15:28:33,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:33,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24376588] [2021-06-12 15:28:33,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24376588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:33,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881094042] [2021-06-12 15:28:33,349 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 15:28:33,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:33,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:33,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:33,582 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 15:28:33,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881094042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:33,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:33,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:33,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001734955] [2021-06-12 15:28:33,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:33,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:33,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:33,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:33,583 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 15:28:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:34,072 INFO L93 Difference]: Finished difference Result 4446 states and 11697 transitions. [2021-06-12 15:28:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:34,072 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 15:28:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:34,076 INFO L225 Difference]: With dead ends: 4446 [2021-06-12 15:28:34,076 INFO L226 Difference]: Without dead ends: 4176 [2021-06-12 15:28:34,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 509.1ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-12 15:28:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-06-12 15:28:34,103 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 15:28:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:34,107 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:34,107 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:34,107 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 15:28:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:34,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:34,109 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 15:28:34,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 15:28:34,310 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1267476287, now seen corresponding path program 107 times [2021-06-12 15:28:34,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:34,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697393113] [2021-06-12 15:28:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:34,473 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 15:28:34,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:34,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697393113] [2021-06-12 15:28:34,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697393113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:34,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232014219] [2021-06-12 15:28:34,474 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 15:28:34,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:28:34,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:34,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:34,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:34,682 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 15:28:34,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232014219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:34,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:34,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:34,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708975962] [2021-06-12 15:28:34,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:34,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:34,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:34,683 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 15:28:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:35,104 INFO L93 Difference]: Finished difference Result 4396 states and 11597 transitions. [2021-06-12 15:28:35,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:35,105 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 15:28:35,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:35,108 INFO L225 Difference]: With dead ends: 4396 [2021-06-12 15:28:35,108 INFO L226 Difference]: Without dead ends: 4126 [2021-06-12 15:28:35,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-12 15:28:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-06-12 15:28:35,134 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 15:28:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:35,138 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:35,138 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:35,138 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 15:28:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:35,140 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:35,140 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 15:28:35,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:35,345 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:35,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:35,345 INFO L82 PathProgramCache]: Analyzing trace with hash 581293103, now seen corresponding path program 108 times [2021-06-12 15:28:35,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:35,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333587304] [2021-06-12 15:28:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:35,518 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 15:28:35,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:35,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333587304] [2021-06-12 15:28:35,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333587304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:35,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224252676] [2021-06-12 15:28:35,518 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 15:28:35,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:28:35,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:35,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:35,805 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 15:28:35,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224252676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:35,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:35,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:35,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128029848] [2021-06-12 15:28:35,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:35,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:35,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:35,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:35,806 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 15:28:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:36,342 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-12 15:28:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:28:36,345 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 15:28:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:36,349 INFO L225 Difference]: With dead ends: 4346 [2021-06-12 15:28:36,349 INFO L226 Difference]: Without dead ends: 4076 [2021-06-12 15:28:36,349 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:28:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-12 15:28:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-12 15:28:36,375 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 15:28:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:36,379 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:36,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:36,379 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:36,379 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 15:28:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:36,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:36,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:36,382 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 15:28:36,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 15:28:36,582 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash 496258365, now seen corresponding path program 109 times [2021-06-12 15:28:36,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:36,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101204671] [2021-06-12 15:28:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:36,715 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 15:28:36,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:36,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101204671] [2021-06-12 15:28:36,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101204671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:36,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746846649] [2021-06-12 15:28:36,716 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 15:28:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:36,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:36,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:36,911 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 15:28:36,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746846649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:36,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:36,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:36,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243722737] [2021-06-12 15:28:36,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:36,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:36,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:36,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:36,913 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 15:28:37,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:37,400 INFO L93 Difference]: Finished difference Result 4296 states and 11397 transitions. [2021-06-12 15:28:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:37,401 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 15:28:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:37,404 INFO L225 Difference]: With dead ends: 4296 [2021-06-12 15:28:37,404 INFO L226 Difference]: Without dead ends: 4026 [2021-06-12 15:28:37,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:28:37,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-12 15:28:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-12 15:28:37,430 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 15:28:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:37,434 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:37,434 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:37,434 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 15:28:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:37,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:37,437 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 15:28:37,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 15:28:37,637 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:37,637 INFO L82 PathProgramCache]: Analyzing trace with hash 428107309, now seen corresponding path program 110 times [2021-06-12 15:28:37,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:37,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300791247] [2021-06-12 15:28:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:37,777 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 15:28:37,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:37,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300791247] [2021-06-12 15:28:37,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300791247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:37,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150019115] [2021-06-12 15:28:37,777 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 15:28:37,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:37,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:37,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:37,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:37,988 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 15:28:37,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150019115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:37,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:37,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:37,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767535587] [2021-06-12 15:28:37,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:37,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:37,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:37,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:37,989 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 15:28:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:38,570 INFO L93 Difference]: Finished difference Result 4246 states and 11297 transitions. [2021-06-12 15:28:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:28:38,571 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 15:28:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:38,574 INFO L225 Difference]: With dead ends: 4246 [2021-06-12 15:28:38,574 INFO L226 Difference]: Without dead ends: 3976 [2021-06-12 15:28:38,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 558.1ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:28:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-12 15:28:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-06-12 15:28:38,600 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 15:28:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:38,625 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:38,625 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:38,625 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 15:28:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:38,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:38,627 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 15:28:38,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 15:28:38,828 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:38,828 INFO L82 PathProgramCache]: Analyzing trace with hash -868861765, now seen corresponding path program 111 times [2021-06-12 15:28:38,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:38,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772524425] [2021-06-12 15:28:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:38,985 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 15:28:38,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:38,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772524425] [2021-06-12 15:28:38,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772524425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:38,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336665581] [2021-06-12 15:28:38,985 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 15:28:39,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:28:39,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:39,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:39,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:39,225 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 15:28:39,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336665581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:39,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:39,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:39,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658004063] [2021-06-12 15:28:39,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:39,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:39,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:39,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:39,226 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 15:28:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:39,718 INFO L93 Difference]: Finished difference Result 4196 states and 11197 transitions. [2021-06-12 15:28:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:28:39,718 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 15:28:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:39,722 INFO L225 Difference]: With dead ends: 4196 [2021-06-12 15:28:39,723 INFO L226 Difference]: Without dead ends: 3926 [2021-06-12 15:28:39,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:28:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-12 15:28:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-06-12 15:28:39,751 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 15:28:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-12 15:28:39,755 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-12 15:28:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:39,755 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-12 15:28:39,755 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 15:28:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-12 15:28:39,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:39,757 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:39,757 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 15:28:39,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:39,961 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:39,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:39,961 INFO L82 PathProgramCache]: Analyzing trace with hash -439108181, now seen corresponding path program 112 times [2021-06-12 15:28:39,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:39,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739894535] [2021-06-12 15:28:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:40,096 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 15:28:40,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:40,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739894535] [2021-06-12 15:28:40,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739894535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:40,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094675052] [2021-06-12 15:28:40,097 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 15:28:40,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:40,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:40,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:40,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:40,336 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 15:28:40,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094675052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:40,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:40,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:40,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779190057] [2021-06-12 15:28:40,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:40,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:40,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:40,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:40,337 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 15:28:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:40,969 INFO L93 Difference]: Finished difference Result 4206 states and 11247 transitions. [2021-06-12 15:28:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:28:40,969 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 15:28:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:40,973 INFO L225 Difference]: With dead ends: 4206 [2021-06-12 15:28:40,973 INFO L226 Difference]: Without dead ends: 3936 [2021-06-12 15:28:40,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:28:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-06-12 15:28:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-06-12 15:28:40,999 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 15:28:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-06-12 15:28:41,003 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-06-12 15:28:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:41,003 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-06-12 15:28:41,003 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 15:28:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-06-12 15:28:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:41,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:41,005 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 15:28:41,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:41,206 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash -496842311, now seen corresponding path program 113 times [2021-06-12 15:28:41,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:41,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323302546] [2021-06-12 15:28:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:41,336 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 15:28:41,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:41,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323302546] [2021-06-12 15:28:41,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323302546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:41,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269724576] [2021-06-12 15:28:41,337 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 15:28:41,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:28:41,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:41,527 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 15:28:41,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269724576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:41,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:41,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:28:41,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543212124] [2021-06-12 15:28:41,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:28:41,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:28:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:28:41,528 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 15:28:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:42,074 INFO L93 Difference]: Finished difference Result 4948 states and 13371 transitions. [2021-06-12 15:28:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:28:42,074 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 15:28:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:42,078 INFO L225 Difference]: With dead ends: 4948 [2021-06-12 15:28:42,078 INFO L226 Difference]: Without dead ends: 4678 [2021-06-12 15:28:42,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:28:42,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-12 15:28:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-06-12 15:28:42,107 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 15:28:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-06-12 15:28:42,111 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-06-12 15:28:42,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:42,111 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-06-12 15:28:42,111 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 15:28:42,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-06-12 15:28:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:28:42,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:42,113 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 15:28:42,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:42,314 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:42,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:42,314 INFO L82 PathProgramCache]: Analyzing trace with hash -474499061, now seen corresponding path program 114 times [2021-06-12 15:28:42,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:42,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839846891] [2021-06-12 15:28:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:42,446 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 15:28:42,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839846891] [2021-06-12 15:28:42,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839846891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005940731] [2021-06-12 15:28:42,446 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 15:28:42,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:28:42,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:42,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:28:42,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:42,653 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 15:28:42,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005940731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:42,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:42,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:28:42,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809783348] [2021-06-12 15:28:42,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:42,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:42,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:42,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:42,654 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 15:28:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:43,353 INFO L93 Difference]: Finished difference Result 4816 states and 13036 transitions. [2021-06-12 15:28:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:28:43,353 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 15:28:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:43,357 INFO L225 Difference]: With dead ends: 4816 [2021-06-12 15:28:43,358 INFO L226 Difference]: Without dead ends: 4241 [2021-06-12 15:28:43,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 666.7ms TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:28:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-06-12 15:28:43,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-06-12 15:28:43,398 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 15:28:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-06-12 15:28:43,401 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-06-12 15:28:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:43,401 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-06-12 15:28:43,401 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 15:28:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-06-12 15:28:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:43,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:43,403 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 15:28:43,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 15:28:43,603 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:43,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1552772481, now seen corresponding path program 115 times [2021-06-12 15:28:43,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:43,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51929787] [2021-06-12 15:28:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:43,783 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 15:28:43,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:43,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51929787] [2021-06-12 15:28:43,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51929787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:43,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242753853] [2021-06-12 15:28:43,783 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 15:28:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:43,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:28:43,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:44,022 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 15:28:44,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242753853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:44,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:44,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-12 15:28:44,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612075438] [2021-06-12 15:28:44,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:44,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:44,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:44,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:44,024 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 15:28:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:44,436 INFO L93 Difference]: Finished difference Result 3364 states and 8756 transitions. [2021-06-12 15:28:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:44,436 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 15:28:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:44,439 INFO L225 Difference]: With dead ends: 3364 [2021-06-12 15:28:44,439 INFO L226 Difference]: Without dead ends: 3030 [2021-06-12 15:28:44,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:28:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-12 15:28:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-06-12 15:28:44,457 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 15:28:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-06-12 15:28:44,459 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-06-12 15:28:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:44,460 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-06-12 15:28:44,460 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 15:28:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-06-12 15:28:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:44,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:44,461 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 15:28:44,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-12 15:28:44,662 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash 642486821, now seen corresponding path program 116 times [2021-06-12 15:28:44,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:44,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883140836] [2021-06-12 15:28:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:44,856 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 15:28:44,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:44,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883140836] [2021-06-12 15:28:44,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883140836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:44,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282647920] [2021-06-12 15:28:44,857 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 15:28:44,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:44,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:44,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:44,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:45,110 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 15:28:45,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282647920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:45,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:45,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:45,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402567926] [2021-06-12 15:28:45,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:45,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:45,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:45,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:45,111 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 15:28:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:45,429 INFO L93 Difference]: Finished difference Result 4086 states and 10137 transitions. [2021-06-12 15:28:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:28:45,429 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 15:28:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:45,432 INFO L225 Difference]: With dead ends: 4086 [2021-06-12 15:28:45,433 INFO L226 Difference]: Without dead ends: 3816 [2021-06-12 15:28:45,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 383.2ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:28:45,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-12 15:28:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-06-12 15:28:45,454 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 15:28:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-06-12 15:28:45,457 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-06-12 15:28:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:45,457 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-06-12 15:28:45,457 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 15:28:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-06-12 15:28:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:45,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:45,459 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 15:28:45,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 15:28:45,659 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:45,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:45,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1552838891, now seen corresponding path program 117 times [2021-06-12 15:28:45,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:45,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068993694] [2021-06-12 15:28:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:45,857 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 15:28:45,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:45,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068993694] [2021-06-12 15:28:45,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068993694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:45,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747333462] [2021-06-12 15:28:45,857 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 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 15:28:45,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:28:45,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:45,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:45,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:46,088 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 15:28:46,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747333462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:46,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:46,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:46,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282961098] [2021-06-12 15:28:46,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:46,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:46,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:46,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:46,090 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 15:28:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:46,473 INFO L93 Difference]: Finished difference Result 4046 states and 10132 transitions. [2021-06-12 15:28:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:46,473 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 15:28:46,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:46,477 INFO L225 Difference]: With dead ends: 4046 [2021-06-12 15:28:46,477 INFO L226 Difference]: Without dead ends: 3776 [2021-06-12 15:28:46,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:28:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-06-12 15:28:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-06-12 15:28:46,513 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 15:28:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-06-12 15:28:46,516 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-06-12 15:28:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:46,516 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-06-12 15:28:46,516 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 15:28:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-06-12 15:28:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:46,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:46,518 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 15:28:46,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 15:28:46,719 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:46,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:46,719 INFO L82 PathProgramCache]: Analyzing trace with hash -42638813, now seen corresponding path program 118 times [2021-06-12 15:28:46,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:46,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798499988] [2021-06-12 15:28:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:46,888 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 15:28:46,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:46,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798499988] [2021-06-12 15:28:46,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798499988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:46,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840611321] [2021-06-12 15:28:46,888 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 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 15:28:46,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:46,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:46,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:47,106 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 15:28:47,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840611321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:47,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:47,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:47,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260246427] [2021-06-12 15:28:47,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:47,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:47,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:47,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:47,107 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 15:28:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:47,450 INFO L93 Difference]: Finished difference Result 4096 states and 10307 transitions. [2021-06-12 15:28:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:28:47,450 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 15:28:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:47,454 INFO L225 Difference]: With dead ends: 4096 [2021-06-12 15:28:47,454 INFO L226 Difference]: Without dead ends: 3826 [2021-06-12 15:28:47,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:28:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-12 15:28:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-06-12 15:28:47,477 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 15:28:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-06-12 15:28:47,480 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-06-12 15:28:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:47,480 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-06-12 15:28:47,480 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 15:28:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-06-12 15:28:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:47,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:47,482 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 15:28:47,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 15:28:47,684 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:47,684 INFO L82 PathProgramCache]: Analyzing trace with hash 597019411, now seen corresponding path program 119 times [2021-06-12 15:28:47,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:47,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140515975] [2021-06-12 15:28:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:47,861 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 15:28:47,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:47,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140515975] [2021-06-12 15:28:47,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140515975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:47,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085446028] [2021-06-12 15:28:47,862 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 15:28:47,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:28:47,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:47,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:47,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:48,086 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 15:28:48,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085446028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:48,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:48,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:48,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827466880] [2021-06-12 15:28:48,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:48,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:48,088 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 15:28:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:48,563 INFO L93 Difference]: Finished difference Result 4121 states and 10432 transitions. [2021-06-12 15:28:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:48,564 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 15:28:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:48,567 INFO L225 Difference]: With dead ends: 4121 [2021-06-12 15:28:48,567 INFO L226 Difference]: Without dead ends: 3851 [2021-06-12 15:28:48,568 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:28:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-12 15:28:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-06-12 15:28:48,594 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 15:28:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-06-12 15:28:48,597 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-06-12 15:28:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:48,597 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-06-12 15:28:48,598 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 15:28:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-06-12 15:28:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:48,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:48,600 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 15:28:48,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:48,801 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash -177899615, now seen corresponding path program 120 times [2021-06-12 15:28:48,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:48,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827174707] [2021-06-12 15:28:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:48,962 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 15:28:48,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:48,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827174707] [2021-06-12 15:28:48,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827174707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:48,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024532506] [2021-06-12 15:28:48,962 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 15:28:49,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:28:49,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:49,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:49,178 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 15:28:49,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024532506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:49,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:49,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:49,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790628604] [2021-06-12 15:28:49,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:49,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:49,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:49,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:49,180 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 15:28:49,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:49,558 INFO L93 Difference]: Finished difference Result 4146 states and 10557 transitions. [2021-06-12 15:28:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:28:49,559 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 15:28:49,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:49,562 INFO L225 Difference]: With dead ends: 4146 [2021-06-12 15:28:49,562 INFO L226 Difference]: Without dead ends: 3876 [2021-06-12 15:28:49,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:28:49,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-06-12 15:28:49,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-06-12 15:28:49,607 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 15:28:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-06-12 15:28:49,610 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-06-12 15:28:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:49,610 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-06-12 15:28:49,610 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 15:28:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-06-12 15:28:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:49,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:49,612 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 15:28:49,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 15:28:49,821 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:49,821 INFO L82 PathProgramCache]: Analyzing trace with hash -631812975, now seen corresponding path program 121 times [2021-06-12 15:28:49,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:49,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493256588] [2021-06-12 15:28:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:49,994 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 15:28:49,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:49,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493256588] [2021-06-12 15:28:49,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493256588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:49,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263650440] [2021-06-12 15:28:49,995 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 15:28:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:50,216 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 15:28:50,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263650440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:50,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:50,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:50,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011588497] [2021-06-12 15:28:50,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:50,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:50,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:50,217 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 15:28:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:50,715 INFO L93 Difference]: Finished difference Result 4171 states and 10682 transitions. [2021-06-12 15:28:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:50,715 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 15:28:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:50,719 INFO L225 Difference]: With dead ends: 4171 [2021-06-12 15:28:50,719 INFO L226 Difference]: Without dead ends: 3901 [2021-06-12 15:28:50,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:28:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-06-12 15:28:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-06-12 15:28:50,743 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 15:28:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-06-12 15:28:50,746 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-06-12 15:28:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:50,747 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-06-12 15:28:50,747 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 15:28:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-06-12 15:28:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:50,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:50,749 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 15:28:50,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 15:28:50,949 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:50,950 INFO L82 PathProgramCache]: Analyzing trace with hash 246198943, now seen corresponding path program 122 times [2021-06-12 15:28:50,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:50,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808036663] [2021-06-12 15:28:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:51,107 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 15:28:51,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:51,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808036663] [2021-06-12 15:28:51,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808036663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:51,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085155745] [2021-06-12 15:28:51,107 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 15:28:51,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:51,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:51,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:51,337 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 15:28:51,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085155745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:51,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:51,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:51,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367552030] [2021-06-12 15:28:51,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:51,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:51,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:51,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:51,338 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 15:28:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:51,751 INFO L93 Difference]: Finished difference Result 4196 states and 10807 transitions. [2021-06-12 15:28:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:51,752 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 15:28:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:51,755 INFO L225 Difference]: With dead ends: 4196 [2021-06-12 15:28:51,755 INFO L226 Difference]: Without dead ends: 3926 [2021-06-12 15:28:51,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 431.2ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:28:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-12 15:28:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-06-12 15:28:51,784 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 15:28:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-06-12 15:28:51,787 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-06-12 15:28:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:51,787 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-06-12 15:28:51,787 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 15:28:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-06-12 15:28:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:51,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:51,789 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 15:28:51,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:51,993 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash -653855857, now seen corresponding path program 123 times [2021-06-12 15:28:51,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:51,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662108680] [2021-06-12 15:28:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:52,154 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 15:28:52,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:52,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662108680] [2021-06-12 15:28:52,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662108680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:52,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331088485] [2021-06-12 15:28:52,154 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 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 15:28:52,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:28:52,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:52,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:52,382 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 15:28:52,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331088485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:52,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:52,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:52,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186828125] [2021-06-12 15:28:52,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:52,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:52,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:52,383 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 15:28:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:52,946 INFO L93 Difference]: Finished difference Result 4221 states and 10932 transitions. [2021-06-12 15:28:52,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:28:52,946 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 15:28:52,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:52,950 INFO L225 Difference]: With dead ends: 4221 [2021-06-12 15:28:52,950 INFO L226 Difference]: Without dead ends: 3951 [2021-06-12 15:28:52,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 554.4ms TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:28:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-06-12 15:28:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-06-12 15:28:52,975 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 15:28:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-06-12 15:28:52,979 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-06-12 15:28:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:52,979 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-06-12 15:28:52,979 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 15:28:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-06-12 15:28:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:52,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:52,981 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 15:28:53,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:53,182 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:53,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1082920163, now seen corresponding path program 124 times [2021-06-12 15:28:53,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:53,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149135041] [2021-06-12 15:28:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:53,335 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 15:28:53,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:53,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149135041] [2021-06-12 15:28:53,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149135041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:53,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208936029] [2021-06-12 15:28:53,336 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 15:28:53,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:53,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:53,548 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 15:28:53,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208936029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:53,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:53,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:53,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184301011] [2021-06-12 15:28:53,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:53,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:53,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:53,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:53,549 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 15:28:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:54,005 INFO L93 Difference]: Finished difference Result 4246 states and 11057 transitions. [2021-06-12 15:28:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:54,005 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 15:28:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:54,008 INFO L225 Difference]: With dead ends: 4246 [2021-06-12 15:28:54,009 INFO L226 Difference]: Without dead ends: 3976 [2021-06-12 15:28:54,009 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:28:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-12 15:28:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-06-12 15:28:54,037 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 15:28:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-06-12 15:28:54,041 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-06-12 15:28:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:54,041 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-06-12 15:28:54,041 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 15:28:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-06-12 15:28:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:54,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:54,043 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 15:28:54,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:54,244 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:54,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1769103347, now seen corresponding path program 125 times [2021-06-12 15:28:54,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:54,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178226231] [2021-06-12 15:28:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:54,415 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 15:28:54,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:54,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178226231] [2021-06-12 15:28:54,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178226231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:54,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430775100] [2021-06-12 15:28:54,415 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 15:28:54,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:28:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:54,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:54,638 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 15:28:54,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430775100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:54,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:54,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121673844] [2021-06-12 15:28:54,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:54,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:54,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:54,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:54,639 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 15:28:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:55,228 INFO L93 Difference]: Finished difference Result 4271 states and 11182 transitions. [2021-06-12 15:28:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:28:55,229 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 15:28:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:55,232 INFO L225 Difference]: With dead ends: 4271 [2021-06-12 15:28:55,232 INFO L226 Difference]: Without dead ends: 4001 [2021-06-12 15:28:55,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 603.7ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:28:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-12 15:28:55,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-06-12 15:28:55,260 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 15:28:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-06-12 15:28:55,263 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-06-12 15:28:55,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:55,264 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-06-12 15:28:55,264 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 15:28:55,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-06-12 15:28:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:55,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:55,266 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 15:28:55,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 15:28:55,466 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1854138085, now seen corresponding path program 126 times [2021-06-12 15:28:55,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:55,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101241865] [2021-06-12 15:28:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:55,617 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 15:28:55,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:55,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101241865] [2021-06-12 15:28:55,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101241865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:55,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379275658] [2021-06-12 15:28:55,618 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 15:28:55,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:28:55,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:55,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:55,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:55,826 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 15:28:55,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379275658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:55,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:55,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:55,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039670775] [2021-06-12 15:28:55,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:55,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:55,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:55,828 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 15:28:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:56,374 INFO L93 Difference]: Finished difference Result 4296 states and 11307 transitions. [2021-06-12 15:28:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:56,374 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 15:28:56,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:56,378 INFO L225 Difference]: With dead ends: 4296 [2021-06-12 15:28:56,378 INFO L226 Difference]: Without dead ends: 4026 [2021-06-12 15:28:56,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 510.8ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:28:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-12 15:28:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-12 15:28:56,407 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 15:28:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-06-12 15:28:56,411 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-06-12 15:28:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:56,411 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-06-12 15:28:56,411 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 15:28:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-06-12 15:28:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:56,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:56,414 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 15:28:56,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 15:28:56,617 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:56,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:56,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1922289141, now seen corresponding path program 127 times [2021-06-12 15:28:56,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:56,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85257576] [2021-06-12 15:28:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:56,767 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 15:28:56,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:56,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85257576] [2021-06-12 15:28:56,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85257576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:56,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556549939] [2021-06-12 15:28:56,767 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 15:28:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:56,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:56,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:56,980 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 15:28:56,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556549939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:56,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:56,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:56,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645175998] [2021-06-12 15:28:56,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:56,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:56,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:56,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:56,982 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 15:28:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:57,630 INFO L93 Difference]: Finished difference Result 4321 states and 11432 transitions. [2021-06-12 15:28:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:28:57,631 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 15:28:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:57,635 INFO L225 Difference]: With dead ends: 4321 [2021-06-12 15:28:57,635 INFO L226 Difference]: Without dead ends: 4051 [2021-06-12 15:28:57,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 639.8ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:28:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-12 15:28:57,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-06-12 15:28:57,668 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 15:28:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-06-12 15:28:57,672 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-06-12 15:28:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:57,672 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-06-12 15:28:57,672 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 15:28:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-06-12 15:28:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:57,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:57,675 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 15:28:57,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:57,875 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:57,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:57,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1075709081, now seen corresponding path program 128 times [2021-06-12 15:28:57,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:57,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005154656] [2021-06-12 15:28:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:58,019 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 15:28:58,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:58,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005154656] [2021-06-12 15:28:58,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005154656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:58,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881715753] [2021-06-12 15:28:58,019 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 15:28:58,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:58,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:58,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:58,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:58,219 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 15:28:58,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881715753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:58,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:58,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:28:58,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848818753] [2021-06-12 15:28:58,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:58,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:58,220 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 15:28:58,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:58,741 INFO L93 Difference]: Finished difference Result 4391 states and 11677 transitions. [2021-06-12 15:28:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:28:58,741 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 15:28:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:58,745 INFO L225 Difference]: With dead ends: 4391 [2021-06-12 15:28:58,745 INFO L226 Difference]: Without dead ends: 4121 [2021-06-12 15:28:58,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 508.6ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:28:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-12 15:28:58,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-06-12 15:28:58,776 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 15:28:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-06-12 15:28:58,779 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-06-12 15:28:58,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:58,779 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-06-12 15:28:58,780 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 15:28:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-06-12 15:28:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:28:58,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:58,782 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 15:28:58,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 15:28:58,983 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:58,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1505462665, now seen corresponding path program 129 times [2021-06-12 15:28:58,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:58,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211299197] [2021-06-12 15:28:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:59,159 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 15:28:59,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:59,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211299197] [2021-06-12 15:28:59,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211299197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:59,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760841550] [2021-06-12 15:28:59,160 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 15:28:59,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:28:59,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:59,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:28:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:59,411 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 15:28:59,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760841550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:59,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:59,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:28:59,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206152113] [2021-06-12 15:28:59,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:59,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:59,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:59,413 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 15:29:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:00,201 INFO L93 Difference]: Finished difference Result 4969 states and 13303 transitions. [2021-06-12 15:29:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:29:00,201 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 15:29:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:00,206 INFO L225 Difference]: With dead ends: 4969 [2021-06-12 15:29:00,206 INFO L226 Difference]: Without dead ends: 4346 [2021-06-12 15:29:00,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 734.9ms TimeCoverageRelationStatistics Valid=866, Invalid=2556, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:29:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-06-12 15:29:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-06-12 15:29:00,234 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 15:29:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-12 15:29:00,238 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-12 15:29:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:00,238 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-12 15:29:00,238 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 15:29:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-12 15:29:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:29:00,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:00,240 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 15:29:00,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-12 15:29:00,445 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1447728535, now seen corresponding path program 130 times [2021-06-12 15:29:00,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:00,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448774652] [2021-06-12 15:29:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:00,636 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 15:29:00,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:00,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448774652] [2021-06-12 15:29:00,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448774652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:00,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941784658] [2021-06-12 15:29:00,636 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 15:29:00,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:00,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:00,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:29:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:00,857 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 15:29:00,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941784658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:00,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:00,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:29:00,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653519088] [2021-06-12 15:29:00,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:00,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:00,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:00,858 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 15:29:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:01,425 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-12 15:29:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:29:01,425 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 15:29:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:01,430 INFO L225 Difference]: With dead ends: 5198 [2021-06-12 15:29:01,431 INFO L226 Difference]: Without dead ends: 4928 [2021-06-12 15:29:01,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-12 15:29:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-12 15:29:01,463 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 15:29:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-12 15:29:01,467 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-12 15:29:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:01,467 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-12 15:29:01,467 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 15:29:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-12 15:29:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:29:01,470 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:01,470 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 15:29:01,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 15:29:01,670 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:01,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1470071785, now seen corresponding path program 131 times [2021-06-12 15:29:01,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:01,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201979064] [2021-06-12 15:29:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:01,840 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 15:29:01,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:01,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201979064] [2021-06-12 15:29:01,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201979064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:01,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401108138] [2021-06-12 15:29:01,841 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 15:29:01,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:29:01,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:01,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:29:01,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:02,095 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 15:29:02,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401108138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:02,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:02,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:29:02,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429898869] [2021-06-12 15:29:02,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:02,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:02,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:02,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:02,096 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 15:29:02,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:02,960 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-12 15:29:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:29:02,960 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 15:29:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:02,964 INFO L225 Difference]: With dead ends: 5021 [2021-06-12 15:29:02,964 INFO L226 Difference]: Without dead ends: 4446 [2021-06-12 15:29:02,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:29:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-12 15:29:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-12 15:29:02,988 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 15:29:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-12 15:29:02,990 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-12 15:29:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:02,990 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-12 15:29:02,991 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 15:29:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-12 15:29:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:02,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:02,992 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 15:29:03,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:03,193 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2082436406, now seen corresponding path program 132 times [2021-06-12 15:29:03,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:03,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262288396] [2021-06-12 15:29:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:03,380 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 15:29:03,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:03,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262288396] [2021-06-12 15:29:03,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262288396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:03,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124910552] [2021-06-12 15:29:03,380 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 15:29:03,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:29:03,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:03,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:03,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:03,596 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 15:29:03,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124910552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:03,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:03,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:29:03,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605535417] [2021-06-12 15:29:03,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:03,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:03,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:03,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:03,597 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:03,988 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-12 15:29:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:29:03,989 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 15:29:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:03,992 INFO L225 Difference]: With dead ends: 3821 [2021-06-12 15:29:03,992 INFO L226 Difference]: Without dead ends: 3551 [2021-06-12 15:29:03,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 415.7ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:29:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-12 15:29:04,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-12 15:29:04,013 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 15:29:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-12 15:29:04,015 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-12 15:29:04,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:04,016 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-12 15:29:04,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:04,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-12 15:29:04,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:04,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:04,018 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 15:29:04,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:04,218 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash -112889306, now seen corresponding path program 133 times [2021-06-12 15:29:04,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:04,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640314816] [2021-06-12 15:29:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:04,422 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 15:29:04,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:04,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640314816] [2021-06-12 15:29:04,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640314816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:04,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293806746] [2021-06-12 15:29:04,422 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 15:29:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:04,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:04,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:04,639 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 15:29:04,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293806746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:04,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:04,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:04,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117230840] [2021-06-12 15:29:04,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:04,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:04,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:04,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:04,640 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 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 15:29:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:05,045 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-12 15:29:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:29:05,045 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 15:29:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:05,049 INFO L225 Difference]: With dead ends: 4241 [2021-06-12 15:29:05,049 INFO L226 Difference]: Without dead ends: 3971 [2021-06-12 15:29:05,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:29:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-12 15:29:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-12 15:29:05,071 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 15:29:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-12 15:29:05,074 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-12 15:29:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:05,074 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-12 15:29:05,074 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 15:29:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-12 15:29:05,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:05,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:05,076 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 15:29:05,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:05,277 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:05,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1397310772, now seen corresponding path program 134 times [2021-06-12 15:29:05,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:05,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603135419] [2021-06-12 15:29:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:05,487 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 15:29:05,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:05,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603135419] [2021-06-12 15:29:05,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603135419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:05,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8923496] [2021-06-12 15:29:05,488 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 15:29:05,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:05,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:05,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:05,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:05,691 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 15:29:05,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8923496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:05,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:05,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:29:05,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680322565] [2021-06-12 15:29:05,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:05,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:05,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:05,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:05,692 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:06,097 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-12 15:29:06,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:29:06,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 15:29:06,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:06,101 INFO L225 Difference]: With dead ends: 4271 [2021-06-12 15:29:06,101 INFO L226 Difference]: Without dead ends: 4001 [2021-06-12 15:29:06,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 458.8ms TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:29:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-12 15:29:06,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-12 15:29:06,125 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 15:29:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-12 15:29:06,128 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-12 15:29:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:06,129 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-12 15:29:06,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-12 15:29:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:06,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:06,131 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 15:29:06,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-12 15:29:06,331 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:06,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2036968996, now seen corresponding path program 135 times [2021-06-12 15:29:06,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:06,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433621459] [2021-06-12 15:29:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:06,515 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 15:29:06,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:06,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433621459] [2021-06-12 15:29:06,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433621459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:06,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034576725] [2021-06-12 15:29:06,515 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 15:29:06,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:29:06,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:06,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:06,737 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 15:29:06,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034576725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:06,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:06,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:06,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013183946] [2021-06-12 15:29:06,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:06,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:06,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:06,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:06,738 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 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 15:29:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:07,221 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-12 15:29:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:29:07,221 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 15:29:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:07,225 INFO L225 Difference]: With dead ends: 4296 [2021-06-12 15:29:07,225 INFO L226 Difference]: Without dead ends: 4026 [2021-06-12 15:29:07,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:29:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-12 15:29:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-12 15:29:07,249 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 15:29:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-12 15:29:07,252 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-12 15:29:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:07,252 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-12 15:29:07,253 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 15:29:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-12 15:29:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:07,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:07,255 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 15:29:07,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:07,455 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:07,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1262049970, now seen corresponding path program 136 times [2021-06-12 15:29:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:07,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521870980] [2021-06-12 15:29:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:07,649 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 15:29:07,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:07,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521870980] [2021-06-12 15:29:07,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521870980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:07,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530673035] [2021-06-12 15:29:07,650 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 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 15:29:07,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:07,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:07,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:07,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:07,859 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 15:29:07,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530673035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:07,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:07,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:29:07,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465115813] [2021-06-12 15:29:07,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:07,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:07,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:07,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:07,860 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:08,301 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-12 15:29:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:29:08,301 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 15:29:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:08,305 INFO L225 Difference]: With dead ends: 4321 [2021-06-12 15:29:08,305 INFO L226 Difference]: Without dead ends: 4051 [2021-06-12 15:29:08,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:29:08,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-12 15:29:08,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-12 15:29:08,353 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 15:29:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-12 15:29:08,358 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-12 15:29:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:08,358 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-12 15:29:08,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-12 15:29:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:08,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:08,360 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 15:29:08,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 15:29:08,561 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash 808136610, now seen corresponding path program 137 times [2021-06-12 15:29:08,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:08,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716761577] [2021-06-12 15:29:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:08,766 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 15:29:08,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:08,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716761577] [2021-06-12 15:29:08,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716761577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:08,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630504683] [2021-06-12 15:29:08,766 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 15:29:08,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:29:08,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:08,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:08,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:09,004 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 15:29:09,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630504683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:09,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:09,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:09,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860767828] [2021-06-12 15:29:09,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:09,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:09,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:09,006 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 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 15:29:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:09,572 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-12 15:29:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:29:09,573 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 15:29:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:09,576 INFO L225 Difference]: With dead ends: 4346 [2021-06-12 15:29:09,576 INFO L226 Difference]: Without dead ends: 4076 [2021-06-12 15:29:09,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:29:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-12 15:29:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-12 15:29:09,604 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 15:29:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-12 15:29:09,607 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-12 15:29:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:09,607 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-12 15:29:09,607 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 15:29:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-12 15:29:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:09,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:09,610 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 15:29:09,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:09,825 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1686148528, now seen corresponding path program 138 times [2021-06-12 15:29:09,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:09,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818505727] [2021-06-12 15:29:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:10,031 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 15:29:10,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:10,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818505727] [2021-06-12 15:29:10,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818505727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:10,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113377745] [2021-06-12 15:29:10,032 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 15:29:10,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:29:10,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:10,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:10,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:10,263 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 15:29:10,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113377745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:10,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:10,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:29:10,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161312697] [2021-06-12 15:29:10,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:10,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:10,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:10,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:10,264 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:10,728 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-12 15:29:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:29:10,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 15:29:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:10,732 INFO L225 Difference]: With dead ends: 4371 [2021-06-12 15:29:10,732 INFO L226 Difference]: Without dead ends: 4101 [2021-06-12 15:29:10,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:29:10,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-12 15:29:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-12 15:29:10,760 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 15:29:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-12 15:29:10,763 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-12 15:29:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:10,764 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-12 15:29:10,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-12 15:29:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:10,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:10,766 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 15:29:10,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 15:29:10,966 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:10,967 INFO L82 PathProgramCache]: Analyzing trace with hash 786093728, now seen corresponding path program 139 times [2021-06-12 15:29:10,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:10,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076301871] [2021-06-12 15:29:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:11,139 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 15:29:11,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076301871] [2021-06-12 15:29:11,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076301871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481199191] [2021-06-12 15:29:11,139 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 15:29:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:11,358 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 15:29:11,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481199191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:11,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:11,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:11,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113260562] [2021-06-12 15:29:11,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:11,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:11,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:11,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:11,360 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 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 15:29:11,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:11,964 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-12 15:29:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:29:11,965 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 15:29:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:11,968 INFO L225 Difference]: With dead ends: 4396 [2021-06-12 15:29:11,968 INFO L226 Difference]: Without dead ends: 4126 [2021-06-12 15:29:11,969 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:29:11,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-12 15:29:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-12 15:29:12,003 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 15:29:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-12 15:29:12,007 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-12 15:29:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:12,008 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-12 15:29:12,008 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 15:29:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-12 15:29:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:12,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:12,010 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 15:29:12,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 15:29:12,210 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:12,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:12,211 INFO L82 PathProgramCache]: Analyzing trace with hash 357029422, now seen corresponding path program 140 times [2021-06-12 15:29:12,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:12,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957859786] [2021-06-12 15:29:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:12,389 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 15:29:12,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:12,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957859786] [2021-06-12 15:29:12,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957859786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:12,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684192957] [2021-06-12 15:29:12,390 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 15:29:12,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:12,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:12,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:12,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:12,614 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 15:29:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684192957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:12,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:12,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:29:12,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552326938] [2021-06-12 15:29:12,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:12,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:12,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:12,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:12,615 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:13,122 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-12 15:29:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:29:13,122 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 15:29:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:13,126 INFO L225 Difference]: With dead ends: 4421 [2021-06-12 15:29:13,126 INFO L226 Difference]: Without dead ends: 4151 [2021-06-12 15:29:13,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:29:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-12 15:29:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-12 15:29:13,155 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 15:29:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-12 15:29:13,159 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-12 15:29:13,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:13,159 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-12 15:29:13,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-12 15:29:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:13,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:13,161 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 15:29:13,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:13,365 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:13,365 INFO L82 PathProgramCache]: Analyzing trace with hash -329153762, now seen corresponding path program 141 times [2021-06-12 15:29:13,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:13,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557235999] [2021-06-12 15:29:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:13,529 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 15:29:13,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:13,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557235999] [2021-06-12 15:29:13,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557235999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:13,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983948158] [2021-06-12 15:29:13,530 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 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 15:29:13,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:29:13,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:13,785 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 15:29:13,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983948158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:13,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:13,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:13,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467301036] [2021-06-12 15:29:13,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:13,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:13,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:13,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:13,786 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 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 15:29:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:14,404 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-12 15:29:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:29:14,405 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 15:29:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:14,408 INFO L225 Difference]: With dead ends: 4446 [2021-06-12 15:29:14,409 INFO L226 Difference]: Without dead ends: 4176 [2021-06-12 15:29:14,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 605.9ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-12 15:29:14,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-12 15:29:14,437 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 15:29:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-12 15:29:14,441 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-12 15:29:14,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:14,441 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-12 15:29:14,441 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 15:29:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-12 15:29:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:14,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:14,443 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 15:29:14,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 15:29:14,644 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:14,644 INFO L82 PathProgramCache]: Analyzing trace with hash -414188500, now seen corresponding path program 142 times [2021-06-12 15:29:14,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:14,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67815243] [2021-06-12 15:29:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:14,800 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 15:29:14,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:14,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67815243] [2021-06-12 15:29:14,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67815243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:14,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107011048] [2021-06-12 15:29:14,801 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 15:29:14,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:14,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:14,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:14,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:14,994 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 15:29:14,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107011048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:14,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:14,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:29:14,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137161029] [2021-06-12 15:29:14,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:14,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:14,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:14,995 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:15,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:15,541 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-12 15:29:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:29:15,542 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 15:29:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:15,545 INFO L225 Difference]: With dead ends: 4471 [2021-06-12 15:29:15,545 INFO L226 Difference]: Without dead ends: 4201 [2021-06-12 15:29:15,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:15,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-12 15:29:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-12 15:29:15,575 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 15:29:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-12 15:29:15,578 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-12 15:29:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:15,579 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-12 15:29:15,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-12 15:29:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:15,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:15,581 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 15:29:15,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:15,782 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:15,782 INFO L82 PathProgramCache]: Analyzing trace with hash -482339556, now seen corresponding path program 143 times [2021-06-12 15:29:15,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:15,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845318705] [2021-06-12 15:29:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:15,943 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 15:29:15,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:15,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845318705] [2021-06-12 15:29:15,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845318705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:15,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707188330] [2021-06-12 15:29:15,943 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 15:29:16,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:29:16,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:16,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:16,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:16,148 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 15:29:16,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707188330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:16,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:16,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468109336] [2021-06-12 15:29:16,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:16,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:16,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:16,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:16,149 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 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 15:29:16,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:16,817 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-12 15:29:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:29:16,818 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 15:29:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:16,822 INFO L225 Difference]: With dead ends: 4496 [2021-06-12 15:29:16,822 INFO L226 Difference]: Without dead ends: 4226 [2021-06-12 15:29:16,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:29:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-12 15:29:16,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-12 15:29:16,853 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 15:29:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-12 15:29:16,857 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-12 15:29:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:16,857 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-12 15:29:16,857 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 15:29:16,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-12 15:29:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:16,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:16,859 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 15:29:17,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:17,060 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:17,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1779308630, now seen corresponding path program 144 times [2021-06-12 15:29:17,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:17,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616765597] [2021-06-12 15:29:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:17,232 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 15:29:17,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:17,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616765597] [2021-06-12 15:29:17,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616765597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:17,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376108980] [2021-06-12 15:29:17,232 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 15:29:17,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:29:17,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:17,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:17,442 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 15:29:17,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376108980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:17,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:17,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:29:17,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454117895] [2021-06-12 15:29:17,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:17,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:17,443 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:18,005 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-12 15:29:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:29:18,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 15:29:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:18,009 INFO L225 Difference]: With dead ends: 4566 [2021-06-12 15:29:18,009 INFO L226 Difference]: Without dead ends: 4296 [2021-06-12 15:29:18,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 558.6ms TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:29:18,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-12 15:29:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-12 15:29:18,041 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 15:29:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-12 15:29:18,045 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-12 15:29:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:18,045 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-12 15:29:18,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-12 15:29:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:18,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:18,048 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 15:29:18,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:18,248 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:18,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1349555046, now seen corresponding path program 145 times [2021-06-12 15:29:18,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:18,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323060003] [2021-06-12 15:29:18,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:18,444 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 15:29:18,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:18,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323060003] [2021-06-12 15:29:18,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323060003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:18,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194054462] [2021-06-12 15:29:18,445 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 15:29:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:18,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:18,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:18,646 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 15:29:18,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194054462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:18,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:18,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:29:18,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635927550] [2021-06-12 15:29:18,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:18,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:18,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:18,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:29:18,647 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 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 15:29:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:19,421 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-12 15:29:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:29:19,422 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 15:29:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:19,426 INFO L225 Difference]: With dead ends: 5144 [2021-06-12 15:29:19,426 INFO L226 Difference]: Without dead ends: 4521 [2021-06-12 15:29:19,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 758.8ms TimeCoverageRelationStatistics Valid=934, Invalid=2726, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:29:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-12 15:29:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-12 15:29:19,462 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 15:29:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-12 15:29:19,467 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-12 15:29:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:19,467 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-12 15:29:19,468 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 15:29:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-12 15:29:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:19,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:19,471 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 15:29:19,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:19,671 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1407289176, now seen corresponding path program 146 times [2021-06-12 15:29:19,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:19,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270105715] [2021-06-12 15:29:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:19,824 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 15:29:19,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:19,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270105715] [2021-06-12 15:29:19,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270105715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:19,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973682457] [2021-06-12 15:29:19,824 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 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 15:29:19,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:19,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:19,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:19,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:20,015 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 15:29:20,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973682457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:20,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:20,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:29:20,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272152983] [2021-06-12 15:29:20,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:29:20,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:20,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:29:20,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:29:20,016 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:20,621 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-12 15:29:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:29:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 15:29:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:20,626 INFO L225 Difference]: With dead ends: 5348 [2021-06-12 15:29:20,626 INFO L226 Difference]: Without dead ends: 5078 [2021-06-12 15:29:20,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 571.8ms TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:29:20,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-12 15:29:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-12 15:29:20,664 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 15:29:20,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-12 15:29:20,668 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-12 15:29:20,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:20,668 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-12 15:29:20,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-12 15:29:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:29:20,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:20,671 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 15:29:20,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-12 15:29:20,872 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1384945926, now seen corresponding path program 147 times [2021-06-12 15:29:20,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:20,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989767043] [2021-06-12 15:29:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:21,102 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 15:29:21,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:21,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989767043] [2021-06-12 15:29:21,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989767043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:21,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248159827] [2021-06-12 15:29:21,102 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 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 15:29:21,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:29:21,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:21,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:29:21,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:21,368 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 15:29:21,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248159827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:21,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:21,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-12 15:29:21,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28043141] [2021-06-12 15:29:21,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:21,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:21,369 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 15:29:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:22,188 INFO L93 Difference]: Finished difference Result 5216 states and 14136 transitions. [2021-06-12 15:29:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:29:22,188 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 15:29:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:22,193 INFO L225 Difference]: With dead ends: 5216 [2021-06-12 15:29:22,193 INFO L226 Difference]: Without dead ends: 4641 [2021-06-12 15:29:22,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 817.1ms TimeCoverageRelationStatistics Valid=1100, Invalid=3060, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:29:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-12 15:29:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2524. [2021-06-12 15:29:22,217 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 15:29:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-06-12 15:29:22,220 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-06-12 15:29:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:22,220 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-06-12 15:29:22,220 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 15:29:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-06-12 15:29:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:22,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:22,222 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 15:29:22,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-12 15:29:22,422 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:22,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:22,423 INFO L82 PathProgramCache]: Analyzing trace with hash -736595598, now seen corresponding path program 148 times [2021-06-12 15:29:22,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:22,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642460501] [2021-06-12 15:29:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:22,634 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 15:29:22,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:22,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642460501] [2021-06-12 15:29:22,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642460501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:22,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084844102] [2021-06-12 15:29:22,635 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 15:29:22,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:22,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:22,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:22,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:22,940 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 15:29:22,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084844102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:22,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:22,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2021-06-12 15:29:22,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991781230] [2021-06-12 15:29:22,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:29:22,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:22,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:29:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:29:22,941 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:23,369 INFO L93 Difference]: Finished difference Result 3614 states and 9406 transitions. [2021-06-12 15:29:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:29:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:29:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:23,372 INFO L225 Difference]: With dead ends: 3614 [2021-06-12 15:29:23,373 INFO L226 Difference]: Without dead ends: 3280 [2021-06-12 15:29:23,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:29:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-12 15:29:23,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2609. [2021-06-12 15:29:23,393 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 15:29:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7076 transitions. [2021-06-12 15:29:23,396 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7076 transitions. Word has length 120 [2021-06-12 15:29:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:23,396 INFO L482 AbstractCegarLoop]: Abstraction has 2609 states and 7076 transitions. [2021-06-12 15:29:23,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7076 transitions. [2021-06-12 15:29:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:23,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:23,398 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 15:29:23,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 15:29:23,598 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:23,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1812195050, now seen corresponding path program 149 times [2021-06-12 15:29:23,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:23,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257396540] [2021-06-12 15:29:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:23,802 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 15:29:23,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:23,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257396540] [2021-06-12 15:29:23,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257396540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:23,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058546541] [2021-06-12 15:29:23,803 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 15:29:23,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:29:23,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:23,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:23,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:24,029 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 15:29:24,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058546541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:24,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:24,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:24,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563957090] [2021-06-12 15:29:24,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:24,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:24,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:24,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:24,030 INFO L87 Difference]: Start difference. First operand 2609 states and 7076 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 15:29:24,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:24,378 INFO L93 Difference]: Finished difference Result 4436 states and 10987 transitions. [2021-06-12 15:29:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:29:24,378 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 15:29:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:24,382 INFO L225 Difference]: With dead ends: 4436 [2021-06-12 15:29:24,382 INFO L226 Difference]: Without dead ends: 4166 [2021-06-12 15:29:24,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 432.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1437, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:29:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-12 15:29:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 2753. [2021-06-12 15:29:24,408 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 15:29:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7493 transitions. [2021-06-12 15:29:24,411 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7493 transitions. Word has length 120 [2021-06-12 15:29:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:24,411 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7493 transitions. [2021-06-12 15:29:24,412 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 15:29:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7493 transitions. [2021-06-12 15:29:24,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:24,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:24,413 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 15:29:24,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 15:29:24,614 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:24,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1564387846, now seen corresponding path program 150 times [2021-06-12 15:29:24,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:24,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896424476] [2021-06-12 15:29:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:24,855 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 15:29:24,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:24,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896424476] [2021-06-12 15:29:24,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896424476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:24,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119224511] [2021-06-12 15:29:24,855 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 15:29:24,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:29:24,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:24,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:24,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:25,102 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 15:29:25,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119224511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:25,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:25,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-12 15:29:25,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520076991] [2021-06-12 15:29:25,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:25,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:25,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:25,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:25,104 INFO L87 Difference]: Start difference. First operand 2753 states and 7493 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:25,527 INFO L93 Difference]: Finished difference Result 4396 states and 10982 transitions. [2021-06-12 15:29:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:29:25,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 15:29:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:25,532 INFO L225 Difference]: With dead ends: 4396 [2021-06-12 15:29:25,532 INFO L226 Difference]: Without dead ends: 4126 [2021-06-12 15:29:25,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 531.9ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:29:25,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-12 15:29:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2828. [2021-06-12 15:29:25,561 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 15:29:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7718 transitions. [2021-06-12 15:29:25,565 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7718 transitions. Word has length 120 [2021-06-12 15:29:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:25,565 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7718 transitions. [2021-06-12 15:29:25,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7718 transitions. [2021-06-12 15:29:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:25,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:25,568 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 15:29:25,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 15:29:25,768 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:25,768 INFO L82 PathProgramCache]: Analyzing trace with hash -212302956, now seen corresponding path program 151 times [2021-06-12 15:29:25,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:25,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769851789] [2021-06-12 15:29:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:26,009 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 15:29:26,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:26,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769851789] [2021-06-12 15:29:26,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769851789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:26,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34140611] [2021-06-12 15:29:26,010 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 15:29:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:26,283 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 15:29:26,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34140611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:26,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:26,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:26,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518816128] [2021-06-12 15:29:26,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:26,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:26,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:26,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:26,285 INFO L87 Difference]: Start difference. First operand 2828 states and 7718 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 15:29:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:26,697 INFO L93 Difference]: Finished difference Result 4446 states and 11157 transitions. [2021-06-12 15:29:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:29:26,697 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 15:29:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:26,701 INFO L225 Difference]: With dead ends: 4446 [2021-06-12 15:29:26,701 INFO L226 Difference]: Without dead ends: 4176 [2021-06-12 15:29:26,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:29:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-12 15:29:26,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2903. [2021-06-12 15:29:26,726 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 15:29:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 7943 transitions. [2021-06-12 15:29:26,729 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 7943 transitions. Word has length 120 [2021-06-12 15:29:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:26,730 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 7943 transitions. [2021-06-12 15:29:26,730 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 15:29:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 7943 transitions. [2021-06-12 15:29:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:26,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:26,732 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 15:29:26,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 15:29:26,932 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1887338628, now seen corresponding path program 152 times [2021-06-12 15:29:26,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:26,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762350807] [2021-06-12 15:29:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:27,144 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 15:29:27,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:27,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762350807] [2021-06-12 15:29:27,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762350807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:27,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744939659] [2021-06-12 15:29:27,145 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 15:29:27,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:27,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:27,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:27,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:27,387 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 15:29:27,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744939659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:27,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:27,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-12 15:29:27,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771792418] [2021-06-12 15:29:27,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:27,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:27,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:27,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:27,388 INFO L87 Difference]: Start difference. First operand 2903 states and 7943 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:27,870 INFO L93 Difference]: Finished difference Result 4471 states and 11282 transitions. [2021-06-12 15:29:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:29:27,870 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 15:29:27,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:27,874 INFO L225 Difference]: With dead ends: 4471 [2021-06-12 15:29:27,874 INFO L226 Difference]: Without dead ends: 4201 [2021-06-12 15:29:27,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=622, Invalid=1928, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:29:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-12 15:29:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2978. [2021-06-12 15:29:27,899 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 15:29:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8168 transitions. [2021-06-12 15:29:27,902 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8168 transitions. Word has length 120 [2021-06-12 15:29:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:27,903 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8168 transitions. [2021-06-12 15:29:27,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8168 transitions. [2021-06-12 15:29:27,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:27,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:27,905 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 15:29:28,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:28,105 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:28,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:28,106 INFO L82 PathProgramCache]: Analyzing trace with hash -897428590, now seen corresponding path program 153 times [2021-06-12 15:29:28,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:28,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169360487] [2021-06-12 15:29:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:28,291 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 15:29:28,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:28,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169360487] [2021-06-12 15:29:28,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169360487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:28,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104006885] [2021-06-12 15:29:28,292 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 15:29:28,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:29:28,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:28,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:28,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:28,541 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 15:29:28,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104006885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:28,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:28,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:28,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100570966] [2021-06-12 15:29:28,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:28,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:28,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:28,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:28,542 INFO L87 Difference]: Start difference. First operand 2978 states and 8168 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 15:29:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:28,969 INFO L93 Difference]: Finished difference Result 4496 states and 11407 transitions. [2021-06-12 15:29:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:29:28,969 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 15:29:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:28,973 INFO L225 Difference]: With dead ends: 4496 [2021-06-12 15:29:28,973 INFO L226 Difference]: Without dead ends: 4226 [2021-06-12 15:29:28,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=571, Invalid=1781, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:29:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-12 15:29:28,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3053. [2021-06-12 15:29:29,000 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 15:29:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8393 transitions. [2021-06-12 15:29:29,003 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8393 transitions. Word has length 120 [2021-06-12 15:29:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:29,003 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8393 transitions. [2021-06-12 15:29:29,003 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 15:29:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8393 transitions. [2021-06-12 15:29:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:29,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:29,006 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 15:29:29,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:29,208 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash -257770366, now seen corresponding path program 154 times [2021-06-12 15:29:29,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:29,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306610246] [2021-06-12 15:29:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:29,402 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 15:29:29,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:29,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306610246] [2021-06-12 15:29:29,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306610246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:29,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996497782] [2021-06-12 15:29:29,402 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 15:29:29,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:29,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:29,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:29,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:29,640 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 15:29:29,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996497782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:29,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:29,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-12 15:29:29,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300209387] [2021-06-12 15:29:29,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:29,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:29,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:29,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:29,641 INFO L87 Difference]: Start difference. First operand 3053 states and 8393 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:30,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:30,180 INFO L93 Difference]: Finished difference Result 4521 states and 11532 transitions. [2021-06-12 15:29:30,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:29:30,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 15:29:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:30,184 INFO L225 Difference]: With dead ends: 4521 [2021-06-12 15:29:30,184 INFO L226 Difference]: Without dead ends: 4251 [2021-06-12 15:29:30,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 573.8ms TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:29:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-12 15:29:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3128. [2021-06-12 15:29:30,210 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 15:29:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8618 transitions. [2021-06-12 15:29:30,214 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8618 transitions. Word has length 120 [2021-06-12 15:29:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:30,214 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8618 transitions. [2021-06-12 15:29:30,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8618 transitions. [2021-06-12 15:29:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:30,216 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:30,216 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 15:29:30,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:30,417 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1032689392, now seen corresponding path program 155 times [2021-06-12 15:29:30,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:30,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269118613] [2021-06-12 15:29:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:30,598 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 15:29:30,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:30,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269118613] [2021-06-12 15:29:30,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269118613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:30,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888803490] [2021-06-12 15:29:30,599 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 15:29:30,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:29:30,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:30,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:30,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:30,817 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 15:29:30,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888803490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:30,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:30,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51421302] [2021-06-12 15:29:30,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:30,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:30,818 INFO L87 Difference]: Start difference. First operand 3128 states and 8618 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 15:29:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:31,285 INFO L93 Difference]: Finished difference Result 4546 states and 11657 transitions. [2021-06-12 15:29:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:29:31,286 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 15:29:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:31,290 INFO L225 Difference]: With dead ends: 4546 [2021-06-12 15:29:31,290 INFO L226 Difference]: Without dead ends: 4276 [2021-06-12 15:29:31,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=609, Invalid=1941, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:29:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-12 15:29:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3203. [2021-06-12 15:29:31,319 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 15:29:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8843 transitions. [2021-06-12 15:29:31,323 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8843 transitions. Word has length 120 [2021-06-12 15:29:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:31,323 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8843 transitions. [2021-06-12 15:29:31,323 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 15:29:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8843 transitions. [2021-06-12 15:29:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:31,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:31,326 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 15:29:31,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:31,526 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:31,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:31,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1486602752, now seen corresponding path program 156 times [2021-06-12 15:29:31,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:31,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063159232] [2021-06-12 15:29:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:31,715 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 15:29:31,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:31,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063159232] [2021-06-12 15:29:31,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063159232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:31,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125884641] [2021-06-12 15:29:31,716 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 15:29:31,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:29:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:31,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:31,980 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 15:29:31,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125884641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:31,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:31,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-12 15:29:31,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872288029] [2021-06-12 15:29:31,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:31,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:31,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:31,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:31,982 INFO L87 Difference]: Start difference. First operand 3203 states and 8843 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:32,599 INFO L93 Difference]: Finished difference Result 4571 states and 11782 transitions. [2021-06-12 15:29:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:29:32,599 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 15:29:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:32,603 INFO L225 Difference]: With dead ends: 4571 [2021-06-12 15:29:32,603 INFO L226 Difference]: Without dead ends: 4301 [2021-06-12 15:29:32,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-12 15:29:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3278. [2021-06-12 15:29:32,632 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 15:29:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9068 transitions. [2021-06-12 15:29:32,636 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9068 transitions. Word has length 120 [2021-06-12 15:29:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:32,636 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9068 transitions. [2021-06-12 15:29:32,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9068 transitions. [2021-06-12 15:29:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:32,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:32,638 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 15:29:32,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:32,839 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:32,839 INFO L82 PathProgramCache]: Analyzing trace with hash -608590834, now seen corresponding path program 157 times [2021-06-12 15:29:32,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:32,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388738314] [2021-06-12 15:29:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:33,011 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 15:29:33,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388738314] [2021-06-12 15:29:33,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388738314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756214461] [2021-06-12 15:29:33,012 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 15:29:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:33,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:33,228 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 15:29:33,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756214461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:33,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:33,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:33,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869642497] [2021-06-12 15:29:33,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:33,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:33,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:33,229 INFO L87 Difference]: Start difference. First operand 3278 states and 9068 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 15:29:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:33,753 INFO L93 Difference]: Finished difference Result 4596 states and 11907 transitions. [2021-06-12 15:29:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:29:33,753 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 15:29:33,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:33,756 INFO L225 Difference]: With dead ends: 4596 [2021-06-12 15:29:33,756 INFO L226 Difference]: Without dead ends: 4326 [2021-06-12 15:29:33,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=663, Invalid=2093, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:29:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-12 15:29:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3353. [2021-06-12 15:29:33,784 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 15:29:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9293 transitions. [2021-06-12 15:29:33,787 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9293 transitions. Word has length 120 [2021-06-12 15:29:33,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:33,787 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9293 transitions. [2021-06-12 15:29:33,787 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 15:29:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9293 transitions. [2021-06-12 15:29:33,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:33,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:33,790 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 15:29:33,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:33,990 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:33,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:33,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1508645634, now seen corresponding path program 158 times [2021-06-12 15:29:33,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:33,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902632629] [2021-06-12 15:29:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:34,172 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 15:29:34,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:34,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902632629] [2021-06-12 15:29:34,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902632629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:34,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808328630] [2021-06-12 15:29:34,173 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 15:29:34,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:34,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:34,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:34,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:34,405 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 15:29:34,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808328630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:34,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:34,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-12 15:29:34,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793823168] [2021-06-12 15:29:34,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:34,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:34,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:34,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:34,406 INFO L87 Difference]: Start difference. First operand 3353 states and 9293 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:35,042 INFO L93 Difference]: Finished difference Result 4621 states and 12032 transitions. [2021-06-12 15:29:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:29:35,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 15:29:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:35,046 INFO L225 Difference]: With dead ends: 4621 [2021-06-12 15:29:35,046 INFO L226 Difference]: Without dead ends: 4351 [2021-06-12 15:29:35,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 654.4ms TimeCoverageRelationStatistics Valid=760, Invalid=2432, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:29:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-12 15:29:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3428. [2021-06-12 15:29:35,087 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 15:29:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9518 transitions. [2021-06-12 15:29:35,092 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9518 transitions. Word has length 120 [2021-06-12 15:29:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:35,092 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9518 transitions. [2021-06-12 15:29:35,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9518 transitions. [2021-06-12 15:29:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:35,095 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:35,095 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 15:29:35,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:35,297 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:35,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:35,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1937709940, now seen corresponding path program 159 times [2021-06-12 15:29:35,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:35,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075231991] [2021-06-12 15:29:35,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:35,466 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 15:29:35,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:35,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075231991] [2021-06-12 15:29:35,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075231991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:35,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228889730] [2021-06-12 15:29:35,466 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 15:29:35,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:29:35,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:35,704 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 15:29:35,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228889730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:35,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:35,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:35,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413854036] [2021-06-12 15:29:35,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:35,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:35,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:35,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:35,706 INFO L87 Difference]: Start difference. First operand 3428 states and 9518 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 15:29:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:36,273 INFO L93 Difference]: Finished difference Result 4646 states and 12157 transitions. [2021-06-12 15:29:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:29:36,273 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 15:29:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:36,278 INFO L225 Difference]: With dead ends: 4646 [2021-06-12 15:29:36,278 INFO L226 Difference]: Without dead ends: 4376 [2021-06-12 15:29:36,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=733, Invalid=2237, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:36,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-12 15:29:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3503. [2021-06-12 15:29:36,309 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 15:29:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9743 transitions. [2021-06-12 15:29:36,313 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9743 transitions. Word has length 120 [2021-06-12 15:29:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:36,313 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9743 transitions. [2021-06-12 15:29:36,313 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 15:29:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9743 transitions. [2021-06-12 15:29:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:36,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:36,316 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 15:29:36,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 15:29:36,516 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:36,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1671074172, now seen corresponding path program 160 times [2021-06-12 15:29:36,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:36,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081411948] [2021-06-12 15:29:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:36,693 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 15:29:36,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:36,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081411948] [2021-06-12 15:29:36,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081411948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:36,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472625894] [2021-06-12 15:29:36,694 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 15:29:36,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:36,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:36,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:36,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:36,918 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 15:29:36,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472625894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:36,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:36,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-12 15:29:36,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832779315] [2021-06-12 15:29:36,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:36,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:36,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:36,919 INFO L87 Difference]: Start difference. First operand 3503 states and 9743 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:37,651 INFO L93 Difference]: Finished difference Result 4671 states and 12282 transitions. [2021-06-12 15:29:37,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:29:37,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 15:29:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:37,655 INFO L225 Difference]: With dead ends: 4671 [2021-06-12 15:29:37,655 INFO L226 Difference]: Without dead ends: 4401 [2021-06-12 15:29:37,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 693.9ms TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:29:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-12 15:29:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3578. [2021-06-12 15:29:37,686 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 15:29:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9968 transitions. [2021-06-12 15:29:37,690 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9968 transitions. Word has length 120 [2021-06-12 15:29:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:37,690 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9968 transitions. [2021-06-12 15:29:37,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:37,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9968 transitions. [2021-06-12 15:29:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:37,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:37,693 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 15:29:37,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-12 15:29:37,894 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1586039434, now seen corresponding path program 161 times [2021-06-12 15:29:37,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:37,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110342417] [2021-06-12 15:29:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:38,057 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 15:29:38,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:38,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110342417] [2021-06-12 15:29:38,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110342417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:38,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530815468] [2021-06-12 15:29:38,058 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 15:29:38,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:29:38,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:38,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:38,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:38,269 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 15:29:38,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530815468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:38,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:38,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:38,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131693509] [2021-06-12 15:29:38,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:38,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:38,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:38,270 INFO L87 Difference]: Start difference. First operand 3578 states and 9968 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 15:29:38,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:38,868 INFO L93 Difference]: Finished difference Result 4696 states and 12407 transitions. [2021-06-12 15:29:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:29:38,868 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 15:29:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:38,872 INFO L225 Difference]: With dead ends: 4696 [2021-06-12 15:29:38,873 INFO L226 Difference]: Without dead ends: 4426 [2021-06-12 15:29:38,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 569.6ms TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:29:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-12 15:29:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3653. [2021-06-12 15:29:38,907 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 15:29:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10193 transitions. [2021-06-12 15:29:38,911 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10193 transitions. Word has length 120 [2021-06-12 15:29:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:38,911 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10193 transitions. [2021-06-12 15:29:38,911 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 15:29:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10193 transitions. [2021-06-12 15:29:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:38,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:38,914 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 15:29:39,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 15:29:39,115 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1517888378, now seen corresponding path program 162 times [2021-06-12 15:29:39,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:39,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364941801] [2021-06-12 15:29:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:39,321 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 15:29:39,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:39,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364941801] [2021-06-12 15:29:39,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364941801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:39,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894494903] [2021-06-12 15:29:39,322 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 15:29:39,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:29:39,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:39,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:39,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:39,556 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 15:29:39,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894494903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:39,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:39,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-12 15:29:39,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868219689] [2021-06-12 15:29:39,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:39,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:39,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:39,558 INFO L87 Difference]: Start difference. First operand 3653 states and 10193 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:40,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:40,325 INFO L93 Difference]: Finished difference Result 4721 states and 12532 transitions. [2021-06-12 15:29:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:29:40,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 15:29:40,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:40,330 INFO L225 Difference]: With dead ends: 4721 [2021-06-12 15:29:40,330 INFO L226 Difference]: Without dead ends: 4451 [2021-06-12 15:29:40,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 768.0ms TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:29:40,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-12 15:29:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3728. [2021-06-12 15:29:40,363 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 15:29:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10418 transitions. [2021-06-12 15:29:40,368 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10418 transitions. Word has length 120 [2021-06-12 15:29:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:40,368 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10418 transitions. [2021-06-12 15:29:40,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10418 transitions. [2021-06-12 15:29:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:40,371 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:40,371 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 15:29:40,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:40,571 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:40,572 INFO L82 PathProgramCache]: Analyzing trace with hash 220919304, now seen corresponding path program 163 times [2021-06-12 15:29:40,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:40,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521555817] [2021-06-12 15:29:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:40,738 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 15:29:40,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521555817] [2021-06-12 15:29:40,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521555817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536457459] [2021-06-12 15:29:40,738 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 15:29:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:40,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:40,971 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 15:29:40,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536457459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:40,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:40,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:40,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150133175] [2021-06-12 15:29:40,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:40,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:40,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:40,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:40,972 INFO L87 Difference]: Start difference. First operand 3728 states and 10418 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 15:29:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:41,603 INFO L93 Difference]: Finished difference Result 4791 states and 12777 transitions. [2021-06-12 15:29:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:29:41,604 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 15:29:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:41,609 INFO L225 Difference]: With dead ends: 4791 [2021-06-12 15:29:41,609 INFO L226 Difference]: Without dead ends: 4521 [2021-06-12 15:29:41,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=921, Invalid=2501, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:29:41,614 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 15:29:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10658 transitions. [2021-06-12 15:29:41,648 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10658 transitions. Word has length 120 [2021-06-12 15:29:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:41,648 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10658 transitions. [2021-06-12 15:29:41,648 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 15:29:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10658 transitions. [2021-06-12 15:29:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:41,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:41,651 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 15:29:41,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 15:29:41,851 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:41,852 INFO L82 PathProgramCache]: Analyzing trace with hash 650672888, now seen corresponding path program 164 times [2021-06-12 15:29:41,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:41,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111896937] [2021-06-12 15:29:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:42,043 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 15:29:42,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:42,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111896937] [2021-06-12 15:29:42,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111896937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:42,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640271391] [2021-06-12 15:29:42,044 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 15:29:42,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:42,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:42,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:42,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:42,319 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 15:29:42,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640271391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:42,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:42,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-12 15:29:42,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338739803] [2021-06-12 15:29:42,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:42,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:42,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:42,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:42,320 INFO L87 Difference]: Start difference. First operand 3803 states and 10658 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:43,191 INFO L93 Difference]: Finished difference Result 5369 states and 14403 transitions. [2021-06-12 15:29:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:29:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 15:29:43,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:43,196 INFO L225 Difference]: With dead ends: 5369 [2021-06-12 15:29:43,196 INFO L226 Difference]: Without dead ends: 4746 [2021-06-12 15:29:43,196 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 847.7ms TimeCoverageRelationStatistics Valid=1065, Invalid=3095, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:29:43,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-06-12 15:29:43,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3878. [2021-06-12 15:29:43,227 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 15:29:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10888 transitions. [2021-06-12 15:29:43,231 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10888 transitions. Word has length 120 [2021-06-12 15:29:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:43,231 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10888 transitions. [2021-06-12 15:29:43,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10888 transitions. [2021-06-12 15:29:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:43,234 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:43,234 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 15:29:43,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:43,434 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:43,435 INFO L82 PathProgramCache]: Analyzing trace with hash 592938758, now seen corresponding path program 165 times [2021-06-12 15:29:43,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:43,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029031926] [2021-06-12 15:29:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:43,600 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 15:29:43,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:43,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029031926] [2021-06-12 15:29:43,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029031926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:43,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763587254] [2021-06-12 15:29:43,601 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 15:29:43,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:29:43,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:43,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:43,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:43,817 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 15:29:43,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763587254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:43,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:43,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:43,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798756290] [2021-06-12 15:29:43,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:43,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:43,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:43,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:43,818 INFO L87 Difference]: Start difference. First operand 3878 states and 10888 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 15:29:44,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:44,475 INFO L93 Difference]: Finished difference Result 5598 states and 15121 transitions. [2021-06-12 15:29:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:29:44,475 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 15:29:44,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:44,481 INFO L225 Difference]: With dead ends: 5598 [2021-06-12 15:29:44,481 INFO L226 Difference]: Without dead ends: 5328 [2021-06-12 15:29:44,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 630.1ms TimeCoverageRelationStatistics Valid=1040, Invalid=2620, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:29:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-12 15:29:44,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4058. [2021-06-12 15:29:44,535 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 15:29:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 11447 transitions. [2021-06-12 15:29:44,540 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 11447 transitions. Word has length 120 [2021-06-12 15:29:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:44,540 INFO L482 AbstractCegarLoop]: Abstraction has 4058 states and 11447 transitions. [2021-06-12 15:29:44,540 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 15:29:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 11447 transitions. [2021-06-12 15:29:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:29:44,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:44,543 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 15:29:44,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:44,744 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:44,744 INFO L82 PathProgramCache]: Analyzing trace with hash 615282008, now seen corresponding path program 166 times [2021-06-12 15:29:44,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:44,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393695201] [2021-06-12 15:29:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:44,909 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 15:29:44,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:44,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393695201] [2021-06-12 15:29:44,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393695201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:44,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263908771] [2021-06-12 15:29:44,910 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 15:29:44,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:44,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:29:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:45,120 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 15:29:45,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263908771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:45,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:45,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:29:45,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664721871] [2021-06-12 15:29:45,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:45,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:45,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:45,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:45,121 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 15:29:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:45,950 INFO L93 Difference]: Finished difference Result 5085 states and 13821 transitions. [2021-06-12 15:29:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:29:45,950 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 15:29:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:45,955 INFO L225 Difference]: With dead ends: 5085 [2021-06-12 15:29:45,955 INFO L226 Difference]: Without dead ends: 4506 [2021-06-12 15:29:45,955 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 792.4ms TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:29:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-12 15:29:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2713. [2021-06-12 15:29:45,981 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 15:29:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7428 transitions. [2021-06-12 15:29:45,983 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7428 transitions. Word has length 120 [2021-06-12 15:29:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:45,984 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7428 transitions. [2021-06-12 15:29:45,984 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 15:29:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7428 transitions. [2021-06-12 15:29:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:45,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:45,986 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 15:29:46,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:46,189 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:46,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1413473561, now seen corresponding path program 167 times [2021-06-12 15:29:46,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:46,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114436642] [2021-06-12 15:29:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:46,407 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 15:29:46,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:46,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114436642] [2021-06-12 15:29:46,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114436642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:46,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009810781] [2021-06-12 15:29:46,407 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 15:29:46,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:29:46,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:46,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:46,646 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 15:29:46,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009810781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:46,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:46,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:46,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687170217] [2021-06-12 15:29:46,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:46,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:46,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:46,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:46,647 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 15:29:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:47,042 INFO L93 Difference]: Finished difference Result 4031 states and 10267 transitions. [2021-06-12 15:29:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:29:47,042 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 15:29:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:47,046 INFO L225 Difference]: With dead ends: 4031 [2021-06-12 15:29:47,046 INFO L226 Difference]: Without dead ends: 3761 [2021-06-12 15:29:47,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:29:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-12 15:29:47,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2788. [2021-06-12 15:29:47,069 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 15:29:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7653 transitions. [2021-06-12 15:29:47,072 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7653 transitions. Word has length 125 [2021-06-12 15:29:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:47,072 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7653 transitions. [2021-06-12 15:29:47,072 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 15:29:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7653 transitions. [2021-06-12 15:29:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:47,074 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:47,074 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 15:29:47,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-12 15:29:47,275 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:47,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1963109335, now seen corresponding path program 168 times [2021-06-12 15:29:47,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:47,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453466689] [2021-06-12 15:29:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:47,499 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 15:29:47,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453466689] [2021-06-12 15:29:47,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453466689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604195822] [2021-06-12 15:29:47,501 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 15:29:47,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:29:47,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:47,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:47,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:47,740 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 15:29:47,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604195822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:47,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:47,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:47,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066870575] [2021-06-12 15:29:47,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:47,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:47,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:47,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:47,741 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 15:29:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:48,216 INFO L93 Difference]: Finished difference Result 4501 states and 11282 transitions. [2021-06-12 15:29:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:29:48,217 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 15:29:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:48,220 INFO L225 Difference]: With dead ends: 4501 [2021-06-12 15:29:48,220 INFO L226 Difference]: Without dead ends: 4231 [2021-06-12 15:29:48,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 529.5ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:29:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-12 15:29:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2863. [2021-06-12 15:29:48,243 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 15:29:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7878 transitions. [2021-06-12 15:29:48,246 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7878 transitions. Word has length 125 [2021-06-12 15:29:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:48,246 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7878 transitions. [2021-06-12 15:29:48,246 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 15:29:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7878 transitions. [2021-06-12 15:29:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:48,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:48,249 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 15:29:48,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:48,449 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash 186418533, now seen corresponding path program 169 times [2021-06-12 15:29:48,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:48,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950189735] [2021-06-12 15:29:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:48,704 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 15:29:48,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:48,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950189735] [2021-06-12 15:29:48,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950189735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:48,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980758072] [2021-06-12 15:29:48,704 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 15:29:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:48,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:48,959 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 15:29:48,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980758072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:48,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:48,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:48,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081096563] [2021-06-12 15:29:48,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:48,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:48,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:48,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:48,960 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 15:29:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:49,394 INFO L93 Difference]: Finished difference Result 4531 states and 11417 transitions. [2021-06-12 15:29:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:29:49,395 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 15:29:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:49,399 INFO L225 Difference]: With dead ends: 4531 [2021-06-12 15:29:49,399 INFO L226 Difference]: Without dead ends: 4261 [2021-06-12 15:29:49,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 519.7ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:29:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-12 15:29:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2938. [2021-06-12 15:29:49,424 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 15:29:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8103 transitions. [2021-06-12 15:29:49,427 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8103 transitions. Word has length 125 [2021-06-12 15:29:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:49,427 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8103 transitions. [2021-06-12 15:29:49,427 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 15:29:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8103 transitions. [2021-06-12 15:29:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:49,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:49,429 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 15:29:49,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-12 15:29:49,630 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:49,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2008907179, now seen corresponding path program 170 times [2021-06-12 15:29:49,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:49,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441175889] [2021-06-12 15:29:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:49,847 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 15:29:49,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:49,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441175889] [2021-06-12 15:29:49,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441175889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:49,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263409830] [2021-06-12 15:29:49,848 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 15:29:49,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:50,097 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 15:29:50,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263409830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:50,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:50,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:50,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816509885] [2021-06-12 15:29:50,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:50,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:50,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:50,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:50,098 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 15:29:50,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:50,610 INFO L93 Difference]: Finished difference Result 4556 states and 11542 transitions. [2021-06-12 15:29:50,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:29:50,610 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 15:29:50,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:50,614 INFO L225 Difference]: With dead ends: 4556 [2021-06-12 15:29:50,614 INFO L226 Difference]: Without dead ends: 4286 [2021-06-12 15:29:50,615 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:29:50,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-12 15:29:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3013. [2021-06-12 15:29:50,642 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 15:29:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8328 transitions. [2021-06-12 15:29:50,645 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8328 transitions. Word has length 125 [2021-06-12 15:29:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:50,645 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8328 transitions. [2021-06-12 15:29:50,645 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 15:29:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8328 transitions. [2021-06-12 15:29:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:50,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:50,648 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 15:29:50,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 15:29:50,848 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:50,848 INFO L82 PathProgramCache]: Analyzing trace with hash -498707101, now seen corresponding path program 171 times [2021-06-12 15:29:50,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:50,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299865499] [2021-06-12 15:29:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:51,054 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 15:29:51,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:51,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299865499] [2021-06-12 15:29:51,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299865499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:51,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700478507] [2021-06-12 15:29:51,054 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 15:29:51,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:29:51,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:51,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:51,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:51,271 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 15:29:51,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700478507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:51,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:51,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:51,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205350783] [2021-06-12 15:29:51,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:51,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:51,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:51,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:51,272 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 15:29:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:51,746 INFO L93 Difference]: Finished difference Result 4581 states and 11667 transitions. [2021-06-12 15:29:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:29:51,747 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 15:29:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:51,751 INFO L225 Difference]: With dead ends: 4581 [2021-06-12 15:29:51,751 INFO L226 Difference]: Without dead ends: 4311 [2021-06-12 15:29:51,752 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:29:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-12 15:29:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3088. [2021-06-12 15:29:51,799 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 15:29:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8553 transitions. [2021-06-12 15:29:51,803 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8553 transitions. Word has length 125 [2021-06-12 15:29:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:51,803 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8553 transitions. [2021-06-12 15:29:51,803 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 15:29:51,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8553 transitions. [2021-06-12 15:29:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:51,805 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:51,805 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 15:29:52,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 15:29:52,006 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash 140951123, now seen corresponding path program 172 times [2021-06-12 15:29:52,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:52,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153483611] [2021-06-12 15:29:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:52,211 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 15:29:52,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:52,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153483611] [2021-06-12 15:29:52,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153483611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:52,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697378964] [2021-06-12 15:29:52,211 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 15:29:52,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:52,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:52,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:52,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:52,435 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 15:29:52,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697378964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:52,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:52,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:52,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391990049] [2021-06-12 15:29:52,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:52,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:52,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:52,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:52,436 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 15:29:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:53,020 INFO L93 Difference]: Finished difference Result 4606 states and 11792 transitions. [2021-06-12 15:29:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:29:53,021 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 15:29:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:53,024 INFO L225 Difference]: With dead ends: 4606 [2021-06-12 15:29:53,024 INFO L226 Difference]: Without dead ends: 4336 [2021-06-12 15:29:53,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 602.1ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:53,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-06-12 15:29:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3163. [2021-06-12 15:29:53,064 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 15:29:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8778 transitions. [2021-06-12 15:29:53,069 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8778 transitions. Word has length 125 [2021-06-12 15:29:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:53,069 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8778 transitions. [2021-06-12 15:29:53,069 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 15:29:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8778 transitions. [2021-06-12 15:29:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:53,072 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:53,072 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 15:29:53,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-12 15:29:53,285 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:53,285 INFO L82 PathProgramCache]: Analyzing trace with hash -633967903, now seen corresponding path program 173 times [2021-06-12 15:29:53,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:53,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725385644] [2021-06-12 15:29:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:53,492 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 15:29:53,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:53,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725385644] [2021-06-12 15:29:53,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725385644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:53,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934393307] [2021-06-12 15:29:53,493 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 15:29:53,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:29:53,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:53,721 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 15:29:53,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934393307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:53,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:53,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:53,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271711426] [2021-06-12 15:29:53,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:53,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:53,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:53,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:53,722 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 15:29:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:54,243 INFO L93 Difference]: Finished difference Result 4631 states and 11917 transitions. [2021-06-12 15:29:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:29:54,244 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 15:29:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:54,248 INFO L225 Difference]: With dead ends: 4631 [2021-06-12 15:29:54,248 INFO L226 Difference]: Without dead ends: 4361 [2021-06-12 15:29:54,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 542.9ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:29:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-06-12 15:29:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3238. [2021-06-12 15:29:54,276 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 15:29:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 9003 transitions. [2021-06-12 15:29:54,280 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 9003 transitions. Word has length 125 [2021-06-12 15:29:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:54,280 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 9003 transitions. [2021-06-12 15:29:54,280 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 15:29:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 9003 transitions. [2021-06-12 15:29:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:54,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:54,283 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 15:29:54,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:54,483 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1087881263, now seen corresponding path program 174 times [2021-06-12 15:29:54,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:54,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843315663] [2021-06-12 15:29:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:54,682 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 15:29:54,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843315663] [2021-06-12 15:29:54,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843315663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693663964] [2021-06-12 15:29:54,683 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 15:29:54,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:29:54,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:54,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:54,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:54,911 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 15:29:54,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693663964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:54,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:54,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:54,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451585945] [2021-06-12 15:29:54,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:54,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:54,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:54,913 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 15:29:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:55,551 INFO L93 Difference]: Finished difference Result 4656 states and 12042 transitions. [2021-06-12 15:29:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:29:55,551 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 15:29:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:55,554 INFO L225 Difference]: With dead ends: 4656 [2021-06-12 15:29:55,554 INFO L226 Difference]: Without dead ends: 4386 [2021-06-12 15:29:55,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 649.6ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:29:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-12 15:29:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3313. [2021-06-12 15:29:55,582 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 15:29:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9228 transitions. [2021-06-12 15:29:55,586 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9228 transitions. Word has length 125 [2021-06-12 15:29:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:55,586 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9228 transitions. [2021-06-12 15:29:55,586 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 15:29:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9228 transitions. [2021-06-12 15:29:55,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:55,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:55,588 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 15:29:55,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-12 15:29:55,789 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:55,789 INFO L82 PathProgramCache]: Analyzing trace with hash -209869345, now seen corresponding path program 175 times [2021-06-12 15:29:55,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:55,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481210413] [2021-06-12 15:29:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:55,968 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 15:29:55,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:55,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481210413] [2021-06-12 15:29:55,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481210413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:55,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046415004] [2021-06-12 15:29:55,969 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 15:29:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:56,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:56,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:56,176 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 15:29:56,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046415004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:56,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:56,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:56,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598411469] [2021-06-12 15:29:56,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:56,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:56,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:56,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:56,177 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 15:29:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:56,732 INFO L93 Difference]: Finished difference Result 4681 states and 12167 transitions. [2021-06-12 15:29:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:29:56,733 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 15:29:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:56,737 INFO L225 Difference]: With dead ends: 4681 [2021-06-12 15:29:56,737 INFO L226 Difference]: Without dead ends: 4411 [2021-06-12 15:29:56,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:29:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-12 15:29:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3388. [2021-06-12 15:29:56,767 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 15:29:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9453 transitions. [2021-06-12 15:29:56,771 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9453 transitions. Word has length 125 [2021-06-12 15:29:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:56,771 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9453 transitions. [2021-06-12 15:29:56,771 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 15:29:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9453 transitions. [2021-06-12 15:29:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:56,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:56,773 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 15:29:56,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:56,974 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:56,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1109924145, now seen corresponding path program 176 times [2021-06-12 15:29:56,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:56,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433661792] [2021-06-12 15:29:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:57,163 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 15:29:57,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:57,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433661792] [2021-06-12 15:29:57,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433661792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:57,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337052698] [2021-06-12 15:29:57,163 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 15:29:57,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:57,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:57,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:57,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:57,423 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 15:29:57,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337052698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:57,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:57,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:29:57,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322161281] [2021-06-12 15:29:57,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:57,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:57,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:57,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:57,424 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 15:29:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:58,089 INFO L93 Difference]: Finished difference Result 4706 states and 12292 transitions. [2021-06-12 15:29:58,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:29:58,090 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 15:29:58,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:58,094 INFO L225 Difference]: With dead ends: 4706 [2021-06-12 15:29:58,094 INFO L226 Difference]: Without dead ends: 4436 [2021-06-12 15:29:58,094 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 670.9ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:29:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-12 15:29:58,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3463. [2021-06-12 15:29:58,126 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 15:29:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9678 transitions. [2021-06-12 15:29:58,130 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9678 transitions. Word has length 125 [2021-06-12 15:29:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:58,130 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9678 transitions. [2021-06-12 15:29:58,130 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 15:29:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9678 transitions. [2021-06-12 15:29:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:58,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:58,133 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 15:29:58,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:58,333 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:58,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1538988451, now seen corresponding path program 177 times [2021-06-12 15:29:58,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:58,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073047831] [2021-06-12 15:29:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:58,511 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 15:29:58,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:58,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073047831] [2021-06-12 15:29:58,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073047831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:58,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282453954] [2021-06-12 15:29:58,511 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 15:29:58,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:29:58,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:58,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:58,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:58,732 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 15:29:58,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282453954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:58,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:58,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:29:58,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916313766] [2021-06-12 15:29:58,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:29:58,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:58,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:29:58,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:29:58,733 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 15:29:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:59,334 INFO L93 Difference]: Finished difference Result 4731 states and 12417 transitions. [2021-06-12 15:29:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:29:59,334 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 15:29:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:59,338 INFO L225 Difference]: With dead ends: 4731 [2021-06-12 15:29:59,338 INFO L226 Difference]: Without dead ends: 4461 [2021-06-12 15:29:59,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 589.8ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:29:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-12 15:29:59,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3538. [2021-06-12 15:29:59,369 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 15:29:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9903 transitions. [2021-06-12 15:29:59,373 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9903 transitions. Word has length 125 [2021-06-12 15:29:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:59,373 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9903 transitions. [2021-06-12 15:29:59,373 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 15:29:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9903 transitions. [2021-06-12 15:29:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:29:59,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:59,376 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 15:29:59,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:59,577 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:59,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2069795661, now seen corresponding path program 178 times [2021-06-12 15:29:59,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:59,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965359509] [2021-06-12 15:29:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:59,760 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 15:29:59,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:59,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965359509] [2021-06-12 15:29:59,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965359509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:59,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460062217] [2021-06-12 15:29:59,761 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 15:29:59,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:59,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:29:59,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:00,002 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 15:30:00,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460062217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:00,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:00,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:30:00,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277669824] [2021-06-12 15:30:00,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:00,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:00,003 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 15:30:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:00,773 INFO L93 Difference]: Finished difference Result 4756 states and 12542 transitions. [2021-06-12 15:30:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:30:00,773 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 15:30:00,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:00,778 INFO L225 Difference]: With dead ends: 4756 [2021-06-12 15:30:00,778 INFO L226 Difference]: Without dead ends: 4486 [2021-06-12 15:30:00,778 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 736.4ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:30:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-12 15:30:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3613. [2021-06-12 15:30:00,831 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 15:30:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10128 transitions. [2021-06-12 15:30:00,835 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10128 transitions. Word has length 125 [2021-06-12 15:30:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:00,836 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10128 transitions. [2021-06-12 15:30:00,836 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 15:30:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10128 transitions. [2021-06-12 15:30:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:00,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:00,838 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 15:30:01,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:01,039 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1984760923, now seen corresponding path program 179 times [2021-06-12 15:30:01,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:01,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951656692] [2021-06-12 15:30:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:01,218 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 15:30:01,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:01,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951656692] [2021-06-12 15:30:01,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951656692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:01,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753845020] [2021-06-12 15:30:01,219 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 15:30:01,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:30:01,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:30:01,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:01,428 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 15:30:01,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753845020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:01,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:01,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:30:01,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724271512] [2021-06-12 15:30:01,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:30:01,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:01,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:30:01,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:30:01,429 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 15:30:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:02,071 INFO L93 Difference]: Finished difference Result 4781 states and 12667 transitions. [2021-06-12 15:30:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:30:02,071 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 15:30:02,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:02,076 INFO L225 Difference]: With dead ends: 4781 [2021-06-12 15:30:02,076 INFO L226 Difference]: Without dead ends: 4511 [2021-06-12 15:30:02,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 612.7ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:30:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-12 15:30:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3688. [2021-06-12 15:30:02,110 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 15:30:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10353 transitions. [2021-06-12 15:30:02,114 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10353 transitions. Word has length 125 [2021-06-12 15:30:02,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:02,114 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10353 transitions. [2021-06-12 15:30:02,115 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 15:30:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10353 transitions. [2021-06-12 15:30:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:02,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:02,117 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 15:30:02,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-12 15:30:02,318 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1916609867, now seen corresponding path program 180 times [2021-06-12 15:30:02,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:02,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491680899] [2021-06-12 15:30:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:02,498 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 15:30:02,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:02,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491680899] [2021-06-12 15:30:02,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491680899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:02,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901034326] [2021-06-12 15:30:02,499 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 15:30:02,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:30:02,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:02,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:30:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:02,749 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 15:30:02,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901034326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:02,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:02,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:30:02,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886977857] [2021-06-12 15:30:02,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:02,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:02,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:02,750 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 15:30:03,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:03,574 INFO L93 Difference]: Finished difference Result 4806 states and 12792 transitions. [2021-06-12 15:30:03,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:30:03,574 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 15:30:03,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:03,579 INFO L225 Difference]: With dead ends: 4806 [2021-06-12 15:30:03,579 INFO L226 Difference]: Without dead ends: 4536 [2021-06-12 15:30:03,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=1003, Invalid=2903, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:30:03,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-12 15:30:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3763. [2021-06-12 15:30:03,617 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 15:30:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10578 transitions. [2021-06-12 15:30:03,622 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10578 transitions. Word has length 125 [2021-06-12 15:30:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:03,622 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10578 transitions. [2021-06-12 15:30:03,622 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 15:30:03,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10578 transitions. [2021-06-12 15:30:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:03,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:03,626 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 15:30:03,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-12 15:30:03,826 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:03,827 INFO L82 PathProgramCache]: Analyzing trace with hash 619640793, now seen corresponding path program 181 times [2021-06-12 15:30:03,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:03,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854282347] [2021-06-12 15:30:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:04,040 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 15:30:04,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:04,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854282347] [2021-06-12 15:30:04,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854282347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:04,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252144512] [2021-06-12 15:30:04,041 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 15:30:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:04,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:30:04,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:04,247 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 15:30:04,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252144512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:04,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:04,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:30:04,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541529782] [2021-06-12 15:30:04,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:30:04,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:04,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:30:04,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:30:04,249 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 15:30:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:04,931 INFO L93 Difference]: Finished difference Result 4831 states and 12917 transitions. [2021-06-12 15:30:04,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:30:04,932 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 15:30:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:04,936 INFO L225 Difference]: With dead ends: 4831 [2021-06-12 15:30:04,936 INFO L226 Difference]: Without dead ends: 4561 [2021-06-12 15:30:04,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 667.8ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:30:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-12 15:30:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3838. [2021-06-12 15:30:04,974 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 15:30:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10803 transitions. [2021-06-12 15:30:04,979 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10803 transitions. Word has length 125 [2021-06-12 15:30:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:04,979 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10803 transitions. [2021-06-12 15:30:04,979 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 15:30:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10803 transitions. [2021-06-12 15:30:04,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:04,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:04,982 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 15:30:05,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 15:30:05,183 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:05,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1049394377, now seen corresponding path program 182 times [2021-06-12 15:30:05,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:05,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076094311] [2021-06-12 15:30:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:05,360 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 15:30:05,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:05,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076094311] [2021-06-12 15:30:05,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076094311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:05,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781184360] [2021-06-12 15:30:05,361 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 15:30:05,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:05,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:05,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:30:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:05,581 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 15:30:05,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781184360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:05,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:05,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:30:05,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012619274] [2021-06-12 15:30:05,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:05,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:05,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:05,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:05,582 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 15:30:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:06,439 INFO L93 Difference]: Finished difference Result 4916 states and 13207 transitions. [2021-06-12 15:30:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:30:06,439 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 15:30:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:06,443 INFO L225 Difference]: With dead ends: 4916 [2021-06-12 15:30:06,443 INFO L226 Difference]: Without dead ends: 4646 [2021-06-12 15:30:06,444 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 814.1ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:30:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-06-12 15:30:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3913. [2021-06-12 15:30:06,478 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 15:30:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 11048 transitions. [2021-06-12 15:30:06,483 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 11048 transitions. Word has length 125 [2021-06-12 15:30:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:06,483 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 11048 transitions. [2021-06-12 15:30:06,483 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 15:30:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 11048 transitions. [2021-06-12 15:30:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:06,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:06,486 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 15:30:06,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:06,687 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash 991660247, now seen corresponding path program 183 times [2021-06-12 15:30:06,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:06,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117686053] [2021-06-12 15:30:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:06,872 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 15:30:06,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:06,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117686053] [2021-06-12 15:30:06,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117686053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:06,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147402394] [2021-06-12 15:30:06,872 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 15:30:06,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:30:06,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:06,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:30:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:07,084 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 15:30:07,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147402394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:07,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:07,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:30:07,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844923203] [2021-06-12 15:30:07,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:30:07,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:07,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:30:07,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:30:07,085 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 15:30:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:07,788 INFO L93 Difference]: Finished difference Result 5658 states and 15331 transitions. [2021-06-12 15:30:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:30:07,789 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 15:30:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:07,794 INFO L225 Difference]: With dead ends: 5658 [2021-06-12 15:30:07,794 INFO L226 Difference]: Without dead ends: 5388 [2021-06-12 15:30:07,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 671.7ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:30:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-06-12 15:30:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4093. [2021-06-12 15:30:07,831 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 15:30:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11607 transitions. [2021-06-12 15:30:07,836 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11607 transitions. Word has length 125 [2021-06-12 15:30:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:07,836 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 11607 transitions. [2021-06-12 15:30:07,836 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 15:30:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11607 transitions. [2021-06-12 15:30:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:30:07,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:07,839 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 15:30:08,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:08,041 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:08,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:08,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1014003497, now seen corresponding path program 184 times [2021-06-12 15:30:08,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:08,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608504576] [2021-06-12 15:30:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:08,239 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 15:30:08,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:08,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608504576] [2021-06-12 15:30:08,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608504576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:08,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567656394] [2021-06-12 15:30:08,239 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 15:30:08,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:08,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:30:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:08,457 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 15:30:08,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567656394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:08,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:08,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:30:08,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292190156] [2021-06-12 15:30:08,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:08,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:08,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:08,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:08,458 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 15:30:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:09,320 INFO L93 Difference]: Finished difference Result 5120 states and 13981 transitions. [2021-06-12 15:30:09,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:30:09,320 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 15:30:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:09,325 INFO L225 Difference]: With dead ends: 5120 [2021-06-12 15:30:09,325 INFO L226 Difference]: Without dead ends: 4631 [2021-06-12 15:30:09,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 845.1ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:30:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-06-12 15:30:09,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2634. [2021-06-12 15:30:09,352 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 15:30:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-06-12 15:30:09,355 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-06-12 15:30:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:09,355 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-06-12 15:30:09,355 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 15:30:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-06-12 15:30:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:09,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:09,357 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 15:30:09,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:09,558 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:09,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1934097443, now seen corresponding path program 185 times [2021-06-12 15:30:09,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:09,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223696763] [2021-06-12 15:30:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:09,831 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 15:30:09,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:09,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223696763] [2021-06-12 15:30:09,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223696763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:09,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533390405] [2021-06-12 15:30:09,832 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 15:30:09,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:09,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:09,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:10,156 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 15:30:10,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533390405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:10,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:10,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:30:10,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232062223] [2021-06-12 15:30:10,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:30:10,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:10,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:30:10,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:30:10,157 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 15:30:10,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:10,641 INFO L93 Difference]: Finished difference Result 3774 states and 9816 transitions. [2021-06-12 15:30:10,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:30:10,641 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 15:30:10,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:10,645 INFO L225 Difference]: With dead ends: 3774 [2021-06-12 15:30:10,645 INFO L226 Difference]: Without dead ends: 3440 [2021-06-12 15:30:10,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 604.0ms TimeCoverageRelationStatistics Valid=760, Invalid=2102, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:30:10,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-06-12 15:30:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2719. [2021-06-12 15:30:10,668 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 15:30:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 7386 transitions. [2021-06-12 15:30:10,671 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 7386 transitions. Word has length 130 [2021-06-12 15:30:10,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:10,671 INFO L482 AbstractCegarLoop]: Abstraction has 2719 states and 7386 transitions. [2021-06-12 15:30:10,671 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 15:30:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 7386 transitions. [2021-06-12 15:30:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:10,673 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:10,673 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 15:30:10,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:10,874 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:10,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2037815609, now seen corresponding path program 186 times [2021-06-12 15:30:10,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:10,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3500456] [2021-06-12 15:30:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:11,114 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 15:30:11,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:11,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3500456] [2021-06-12 15:30:11,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3500456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:11,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567917849] [2021-06-12 15:30:11,115 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 15:30:11,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:11,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:11,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:11,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:11,362 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 15:30:11,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567917849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:11,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:11,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:11,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515871786] [2021-06-12 15:30:11,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:11,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:11,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:11,364 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 15:30:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:11,761 INFO L93 Difference]: Finished difference Result 4696 states and 11597 transitions. [2021-06-12 15:30:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:30:11,761 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 15:30:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:11,765 INFO L225 Difference]: With dead ends: 4696 [2021-06-12 15:30:11,765 INFO L226 Difference]: Without dead ends: 4426 [2021-06-12 15:30:11,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:30:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-12 15:30:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 2863. [2021-06-12 15:30:11,806 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 15:30:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7803 transitions. [2021-06-12 15:30:11,809 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7803 transitions. Word has length 130 [2021-06-12 15:30:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:11,809 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7803 transitions. [2021-06-12 15:30:11,809 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 15:30:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7803 transitions. [2021-06-12 15:30:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:11,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:11,811 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 15:30:12,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-12 15:30:12,012 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:12,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:12,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1614777271, now seen corresponding path program 187 times [2021-06-12 15:30:12,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:12,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641234002] [2021-06-12 15:30:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:12,262 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 15:30:12,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:12,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641234002] [2021-06-12 15:30:12,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641234002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:12,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400511004] [2021-06-12 15:30:12,263 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 15:30:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:12,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:12,504 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 15:30:12,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400511004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:12,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:12,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:12,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548377579] [2021-06-12 15:30:12,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:12,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:12,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:12,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:12,506 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 15:30:12,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:12,986 INFO L93 Difference]: Finished difference Result 4656 states and 11592 transitions. [2021-06-12 15:30:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:30:12,987 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 15:30:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:12,991 INFO L225 Difference]: With dead ends: 4656 [2021-06-12 15:30:12,991 INFO L226 Difference]: Without dead ends: 4386 [2021-06-12 15:30:12,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 568.2ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:30:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-12 15:30:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 2938. [2021-06-12 15:30:13,016 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 15:30:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8028 transitions. [2021-06-12 15:30:13,019 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8028 transitions. Word has length 130 [2021-06-12 15:30:13,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:13,019 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8028 transitions. [2021-06-12 15:30:13,019 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 15:30:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8028 transitions. [2021-06-12 15:30:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:13,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:13,022 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 15:30:13,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:13,222 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:13,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1568230341, now seen corresponding path program 188 times [2021-06-12 15:30:13,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:13,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296754087] [2021-06-12 15:30:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:13,456 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 15:30:13,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:13,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296754087] [2021-06-12 15:30:13,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296754087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:13,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875521876] [2021-06-12 15:30:13,457 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 15:30:13,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:13,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:13,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:13,697 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 15:30:13,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875521876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:13,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:13,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:13,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190929115] [2021-06-12 15:30:13,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:13,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:13,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:13,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:13,698 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 15:30:14,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:14,128 INFO L93 Difference]: Finished difference Result 4706 states and 11767 transitions. [2021-06-12 15:30:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:30:14,129 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 15:30:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:14,132 INFO L225 Difference]: With dead ends: 4706 [2021-06-12 15:30:14,133 INFO L226 Difference]: Without dead ends: 4436 [2021-06-12 15:30:14,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:30:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-12 15:30:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3013. [2021-06-12 15:30:14,158 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 15:30:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8253 transitions. [2021-06-12 15:30:14,161 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8253 transitions. Word has length 130 [2021-06-12 15:30:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:14,161 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8253 transitions. [2021-06-12 15:30:14,161 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 15:30:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8253 transitions. [2021-06-12 15:30:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:14,163 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:14,163 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 15:30:14,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:14,364 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:14,364 INFO L82 PathProgramCache]: Analyzing trace with hash 649845941, now seen corresponding path program 189 times [2021-06-12 15:30:14,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:14,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553212200] [2021-06-12 15:30:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:14,602 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 15:30:14,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:14,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553212200] [2021-06-12 15:30:14,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553212200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:14,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903190366] [2021-06-12 15:30:14,603 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 15:30:14,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:14,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:14,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:14,849 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 15:30:14,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903190366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:14,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:14,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:14,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064791119] [2021-06-12 15:30:14,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:14,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:14,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:14,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:14,850 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 15:30:15,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:15,387 INFO L93 Difference]: Finished difference Result 4731 states and 11892 transitions. [2021-06-12 15:30:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:30:15,387 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 15:30:15,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:15,391 INFO L225 Difference]: With dead ends: 4731 [2021-06-12 15:30:15,391 INFO L226 Difference]: Without dead ends: 4461 [2021-06-12 15:30:15,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 607.9ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:30:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-12 15:30:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3088. [2021-06-12 15:30:15,437 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 15:30:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8478 transitions. [2021-06-12 15:30:15,441 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8478 transitions. Word has length 130 [2021-06-12 15:30:15,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:15,441 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8478 transitions. [2021-06-12 15:30:15,441 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 15:30:15,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8478 transitions. [2021-06-12 15:30:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:15,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:15,444 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 15:30:15,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:15,644 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:15,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1126844861, now seen corresponding path program 190 times [2021-06-12 15:30:15,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:15,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325830002] [2021-06-12 15:30:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:15,861 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 15:30:15,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:15,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325830002] [2021-06-12 15:30:15,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325830002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:15,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169266705] [2021-06-12 15:30:15,862 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 15:30:15,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:15,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:15,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:15,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:16,084 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 15:30:16,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169266705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:16,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:16,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:16,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965420006] [2021-06-12 15:30:16,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:16,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:16,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:16,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:16,085 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 15:30:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:16,569 INFO L93 Difference]: Finished difference Result 4756 states and 12017 transitions. [2021-06-12 15:30:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:30:16,570 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 15:30:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:16,574 INFO L225 Difference]: With dead ends: 4756 [2021-06-12 15:30:16,574 INFO L226 Difference]: Without dead ends: 4486 [2021-06-12 15:30:16,574 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:30:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-12 15:30:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3163. [2021-06-12 15:30:16,603 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 15:30:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8703 transitions. [2021-06-12 15:30:16,606 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8703 transitions. Word has length 130 [2021-06-12 15:30:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:16,606 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8703 transitions. [2021-06-12 15:30:16,606 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 15:30:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8703 transitions. [2021-06-12 15:30:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:16,608 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:16,608 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 15:30:16,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:16,809 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash 972796723, now seen corresponding path program 191 times [2021-06-12 15:30:16,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:16,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887796425] [2021-06-12 15:30:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:17,043 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 15:30:17,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:17,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887796425] [2021-06-12 15:30:17,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887796425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:17,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028383764] [2021-06-12 15:30:17,044 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 15:30:17,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:17,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:17,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:17,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:17,306 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 15:30:17,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028383764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:17,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:17,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:17,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649847151] [2021-06-12 15:30:17,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:17,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:17,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:17,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:17,307 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 15:30:17,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:17,903 INFO L93 Difference]: Finished difference Result 4781 states and 12142 transitions. [2021-06-12 15:30:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:30:17,903 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 15:30:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:17,908 INFO L225 Difference]: With dead ends: 4781 [2021-06-12 15:30:17,908 INFO L226 Difference]: Without dead ends: 4511 [2021-06-12 15:30:17,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 640.0ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:30:17,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-12 15:30:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3238. [2021-06-12 15:30:17,938 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 15:30:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 8928 transitions. [2021-06-12 15:30:17,941 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 8928 transitions. Word has length 130 [2021-06-12 15:30:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:17,941 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 8928 transitions. [2021-06-12 15:30:17,941 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 15:30:17,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 8928 transitions. [2021-06-12 15:30:17,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:17,944 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:17,944 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 15:30:18,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-12 15:30:18,144 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:18,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1811970495, now seen corresponding path program 192 times [2021-06-12 15:30:18,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:18,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653554192] [2021-06-12 15:30:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:18,382 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 15:30:18,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:18,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653554192] [2021-06-12 15:30:18,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653554192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:18,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320974022] [2021-06-12 15:30:18,383 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 15:30:18,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:18,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:18,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:18,625 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 15:30:18,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320974022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:18,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:18,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:18,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905765333] [2021-06-12 15:30:18,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:18,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:18,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:18,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:18,626 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 15:30:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:19,157 INFO L93 Difference]: Finished difference Result 4806 states and 12267 transitions. [2021-06-12 15:30:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:30:19,157 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 15:30:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:19,161 INFO L225 Difference]: With dead ends: 4806 [2021-06-12 15:30:19,161 INFO L226 Difference]: Without dead ends: 4536 [2021-06-12 15:30:19,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 594.9ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:30:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-12 15:30:19,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3313. [2021-06-12 15:30:19,190 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 15:30:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9153 transitions. [2021-06-12 15:30:19,193 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9153 transitions. Word has length 130 [2021-06-12 15:30:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:19,194 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9153 transitions. [2021-06-12 15:30:19,194 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 15:30:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9153 transitions. [2021-06-12 15:30:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:19,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:19,196 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 15:30:19,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 15:30:19,396 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:19,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1172312271, now seen corresponding path program 193 times [2021-06-12 15:30:19,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:19,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020344305] [2021-06-12 15:30:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:19,614 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 15:30:19,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:19,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020344305] [2021-06-12 15:30:19,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020344305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:19,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719572706] [2021-06-12 15:30:19,615 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 15:30:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:19,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:19,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:19,848 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 15:30:19,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719572706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:19,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:19,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:19,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612951802] [2021-06-12 15:30:19,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:19,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:19,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:19,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:19,849 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 15:30:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:20,502 INFO L93 Difference]: Finished difference Result 4831 states and 12392 transitions. [2021-06-12 15:30:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:30:20,502 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 15:30:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:20,507 INFO L225 Difference]: With dead ends: 4831 [2021-06-12 15:30:20,507 INFO L226 Difference]: Without dead ends: 4561 [2021-06-12 15:30:20,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:30:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-12 15:30:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3388. [2021-06-12 15:30:20,539 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 15:30:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9378 transitions. [2021-06-12 15:30:20,543 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9378 transitions. Word has length 130 [2021-06-12 15:30:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:20,543 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9378 transitions. [2021-06-12 15:30:20,543 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 15:30:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9378 transitions. [2021-06-12 15:30:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:20,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:20,545 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 15:30:20,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 15:30:20,746 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:20,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1947231297, now seen corresponding path program 194 times [2021-06-12 15:30:20,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:20,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099601645] [2021-06-12 15:30:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:20,972 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 15:30:20,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:20,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099601645] [2021-06-12 15:30:20,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099601645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:20,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691341106] [2021-06-12 15:30:20,973 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 15:30:21,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:21,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:21,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:21,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:21,192 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 15:30:21,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691341106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:21,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:21,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:21,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360712553] [2021-06-12 15:30:21,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:21,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:21,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:21,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:21,193 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 15:30:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:21,762 INFO L93 Difference]: Finished difference Result 4856 states and 12517 transitions. [2021-06-12 15:30:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:30:21,762 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 15:30:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:21,766 INFO L225 Difference]: With dead ends: 4856 [2021-06-12 15:30:21,766 INFO L226 Difference]: Without dead ends: 4586 [2021-06-12 15:30:21,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 599.2ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:30:21,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-06-12 15:30:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 3463. [2021-06-12 15:30:21,799 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 15:30:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9603 transitions. [2021-06-12 15:30:21,803 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9603 transitions. Word has length 130 [2021-06-12 15:30:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:21,803 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9603 transitions. [2021-06-12 15:30:21,803 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 15:30:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9603 transitions. [2021-06-12 15:30:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:21,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:21,806 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 15:30:22,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 15:30:22,006 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:22,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:22,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1893822639, now seen corresponding path program 195 times [2021-06-12 15:30:22,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:22,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118583166] [2021-06-12 15:30:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:22,216 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 15:30:22,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:22,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118583166] [2021-06-12 15:30:22,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118583166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:22,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739189166] [2021-06-12 15:30:22,217 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 15:30:22,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:22,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:22,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:22,460 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 15:30:22,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739189166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:22,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:22,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927220021] [2021-06-12 15:30:22,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:22,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:22,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:22,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:22,461 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 15:30:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:23,194 INFO L93 Difference]: Finished difference Result 4881 states and 12642 transitions. [2021-06-12 15:30:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:30:23,195 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 15:30:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:23,199 INFO L225 Difference]: With dead ends: 4881 [2021-06-12 15:30:23,199 INFO L226 Difference]: Without dead ends: 4611 [2021-06-12 15:30:23,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 743.4ms TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:30:23,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-06-12 15:30:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 3538. [2021-06-12 15:30:23,232 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 15:30:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9828 transitions. [2021-06-12 15:30:23,236 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9828 transitions. Word has length 130 [2021-06-12 15:30:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:23,236 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9828 transitions. [2021-06-12 15:30:23,236 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 15:30:23,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9828 transitions. [2021-06-12 15:30:23,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:23,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:23,239 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 15:30:23,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:23,440 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:23,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1523132739, now seen corresponding path program 196 times [2021-06-12 15:30:23,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:23,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79823417] [2021-06-12 15:30:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:23,638 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 15:30:23,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79823417] [2021-06-12 15:30:23,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79823417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790711164] [2021-06-12 15:30:23,639 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 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 15:30:23,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:23,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:23,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:23,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:23,860 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 15:30:23,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790711164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:23,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:23,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:23,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553039204] [2021-06-12 15:30:23,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:23,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:23,861 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 15:30:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:24,485 INFO L93 Difference]: Finished difference Result 4906 states and 12767 transitions. [2021-06-12 15:30:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:30:24,486 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 15:30:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:24,489 INFO L225 Difference]: With dead ends: 4906 [2021-06-12 15:30:24,489 INFO L226 Difference]: Without dead ends: 4636 [2021-06-12 15:30:24,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:30:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-12 15:30:24,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3613. [2021-06-12 15:30:24,520 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 15:30:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10053 transitions. [2021-06-12 15:30:24,523 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10053 transitions. Word has length 130 [2021-06-12 15:30:24,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:24,524 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10053 transitions. [2021-06-12 15:30:24,524 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 15:30:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10053 transitions. [2021-06-12 15:30:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:24,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:24,526 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 15:30:24,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-12 15:30:24,727 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:24,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1871779757, now seen corresponding path program 197 times [2021-06-12 15:30:24,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:24,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956097833] [2021-06-12 15:30:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:24,931 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 15:30:24,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:24,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956097833] [2021-06-12 15:30:24,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956097833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:24,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475861198] [2021-06-12 15:30:24,932 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 15:30:24,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:24,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:24,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:24,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:25,169 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 15:30:25,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475861198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:25,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:25,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:25,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396170644] [2021-06-12 15:30:25,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:25,170 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 15:30:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:25,934 INFO L93 Difference]: Finished difference Result 4931 states and 12892 transitions. [2021-06-12 15:30:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:30:25,935 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 15:30:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:25,940 INFO L225 Difference]: With dead ends: 4931 [2021-06-12 15:30:25,940 INFO L226 Difference]: Without dead ends: 4661 [2021-06-12 15:30:25,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 758.3ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:30:25,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-12 15:30:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3688. [2021-06-12 15:30:25,973 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 15:30:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10278 transitions. [2021-06-12 15:30:25,977 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10278 transitions. Word has length 130 [2021-06-12 15:30:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:25,978 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10278 transitions. [2021-06-12 15:30:25,978 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 15:30:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10278 transitions. [2021-06-12 15:30:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:25,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:25,980 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 15:30:26,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:26,181 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1442715451, now seen corresponding path program 198 times [2021-06-12 15:30:26,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:26,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801679677] [2021-06-12 15:30:26,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:26,396 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 15:30:26,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:26,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801679677] [2021-06-12 15:30:26,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801679677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:26,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127763207] [2021-06-12 15:30:26,397 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 15:30:26,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:26,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:26,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:26,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:26,619 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 15:30:26,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127763207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:26,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:26,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660985230] [2021-06-12 15:30:26,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:26,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:26,620 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 15:30:27,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:27,264 INFO L93 Difference]: Finished difference Result 4956 states and 13017 transitions. [2021-06-12 15:30:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:30:27,265 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 15:30:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:27,270 INFO L225 Difference]: With dead ends: 4956 [2021-06-12 15:30:27,270 INFO L226 Difference]: Without dead ends: 4686 [2021-06-12 15:30:27,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 654.9ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:30:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2021-06-12 15:30:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3763. [2021-06-12 15:30:27,308 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 15:30:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10503 transitions. [2021-06-12 15:30:27,312 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10503 transitions. Word has length 130 [2021-06-12 15:30:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:27,312 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10503 transitions. [2021-06-12 15:30:27,312 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 15:30:27,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10503 transitions. [2021-06-12 15:30:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:27,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:27,316 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 15:30:27,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 15:30:27,516 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:27,516 INFO L82 PathProgramCache]: Analyzing trace with hash 756532267, now seen corresponding path program 199 times [2021-06-12 15:30:27,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:27,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729922465] [2021-06-12 15:30:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:27,717 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 15:30:27,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:27,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729922465] [2021-06-12 15:30:27,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729922465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:27,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198810862] [2021-06-12 15:30:27,717 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 15:30:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:27,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:27,947 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 15:30:27,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198810862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:27,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:27,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:27,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347437879] [2021-06-12 15:30:27,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:27,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:27,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:27,948 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 15:30:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:28,780 INFO L93 Difference]: Finished difference Result 4981 states and 13142 transitions. [2021-06-12 15:30:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:30:28,780 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 15:30:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:28,784 INFO L225 Difference]: With dead ends: 4981 [2021-06-12 15:30:28,785 INFO L226 Difference]: Without dead ends: 4711 [2021-06-12 15:30:28,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 805.8ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:30:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2021-06-12 15:30:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3838. [2021-06-12 15:30:28,822 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 15:30:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10728 transitions. [2021-06-12 15:30:28,827 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10728 transitions. Word has length 130 [2021-06-12 15:30:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:28,827 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10728 transitions. [2021-06-12 15:30:28,827 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 15:30:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10728 transitions. [2021-06-12 15:30:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:28,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:28,830 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 15:30:29,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:29,030 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:29,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash 671497529, now seen corresponding path program 200 times [2021-06-12 15:30:29,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:29,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93966355] [2021-06-12 15:30:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:29,252 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 15:30:29,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:29,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93966355] [2021-06-12 15:30:29,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93966355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:29,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022267180] [2021-06-12 15:30:29,253 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 15:30:29,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:29,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:29,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:29,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:29,521 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 15:30:29,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022267180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:29,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:29,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:29,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200511673] [2021-06-12 15:30:29,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:29,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:29,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:29,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:29,522 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 15:30:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:30,245 INFO L93 Difference]: Finished difference Result 5006 states and 13267 transitions. [2021-06-12 15:30:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:30:30,245 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 15:30:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:30,250 INFO L225 Difference]: With dead ends: 5006 [2021-06-12 15:30:30,250 INFO L226 Difference]: Without dead ends: 4736 [2021-06-12 15:30:30,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 681.7ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:30:30,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-12 15:30:30,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3913. [2021-06-12 15:30:30,285 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 15:30:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10953 transitions. [2021-06-12 15:30:30,289 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10953 transitions. Word has length 130 [2021-06-12 15:30:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:30,290 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10953 transitions. [2021-06-12 15:30:30,290 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 15:30:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10953 transitions. [2021-06-12 15:30:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:30,293 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:30,293 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 15:30:30,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:30,493 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:30,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:30,494 INFO L82 PathProgramCache]: Analyzing trace with hash 603346473, now seen corresponding path program 201 times [2021-06-12 15:30:30,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:30,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253760270] [2021-06-12 15:30:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:30,688 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 15:30:30,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:30,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253760270] [2021-06-12 15:30:30,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253760270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:30,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83241153] [2021-06-12 15:30:30,689 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 15:30:30,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:30,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:30,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:30,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:30,925 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 15:30:30,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83241153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:30,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:30,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:30,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80882359] [2021-06-12 15:30:30,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:30,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:30,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:30,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:30,926 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 15:30:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:31,833 INFO L93 Difference]: Finished difference Result 5031 states and 13392 transitions. [2021-06-12 15:30:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:30:31,833 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 15:30:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:31,837 INFO L225 Difference]: With dead ends: 5031 [2021-06-12 15:30:31,837 INFO L226 Difference]: Without dead ends: 4761 [2021-06-12 15:30:31,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 861.7ms TimeCoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:30:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-06-12 15:30:31,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3988. [2021-06-12 15:30:31,872 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 15:30:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11178 transitions. [2021-06-12 15:30:31,876 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11178 transitions. Word has length 130 [2021-06-12 15:30:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:31,876 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11178 transitions. [2021-06-12 15:30:31,877 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 15:30:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11178 transitions. [2021-06-12 15:30:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:31,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:31,879 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 15:30:32,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:32,080 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:32,080 INFO L82 PathProgramCache]: Analyzing trace with hash -693622601, now seen corresponding path program 202 times [2021-06-12 15:30:32,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:32,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32969039] [2021-06-12 15:30:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:32,271 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 15:30:32,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:32,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32969039] [2021-06-12 15:30:32,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32969039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:32,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858577602] [2021-06-12 15:30:32,271 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 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 15:30:32,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:32,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:32,482 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 15:30:32,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858577602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:32,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:32,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:32,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714012858] [2021-06-12 15:30:32,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:32,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:32,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:32,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:32,483 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 15:30:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:33,222 INFO L93 Difference]: Finished difference Result 5056 states and 13517 transitions. [2021-06-12 15:30:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:30:33,222 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 15:30:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:33,227 INFO L225 Difference]: With dead ends: 5056 [2021-06-12 15:30:33,227 INFO L226 Difference]: Without dead ends: 4786 [2021-06-12 15:30:33,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 691.4ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:30:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-12 15:30:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4063. [2021-06-12 15:30:33,265 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 15:30:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11403 transitions. [2021-06-12 15:30:33,270 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11403 transitions. Word has length 130 [2021-06-12 15:30:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:33,270 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11403 transitions. [2021-06-12 15:30:33,270 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 15:30:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11403 transitions. [2021-06-12 15:30:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:33,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:33,273 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 15:30:33,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 15:30:33,474 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:33,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:33,474 INFO L82 PathProgramCache]: Analyzing trace with hash -263869017, now seen corresponding path program 203 times [2021-06-12 15:30:33,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:33,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126130309] [2021-06-12 15:30:33,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:33,691 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 15:30:33,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:33,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126130309] [2021-06-12 15:30:33,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126130309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:33,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096342399] [2021-06-12 15:30:33,691 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 15:30:33,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:33,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:33,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:33,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:33,919 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 15:30:33,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096342399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:33,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:33,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:30:33,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676846951] [2021-06-12 15:30:33,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:33,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:33,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:33,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:33,920 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 15:30:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:34,858 INFO L93 Difference]: Finished difference Result 5141 states and 13807 transitions. [2021-06-12 15:30:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:30:34,858 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 15:30:34,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:34,863 INFO L225 Difference]: With dead ends: 5141 [2021-06-12 15:30:34,863 INFO L226 Difference]: Without dead ends: 4871 [2021-06-12 15:30:34,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 895.6ms TimeCoverageRelationStatistics Valid=1235, Invalid=3321, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:30:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-06-12 15:30:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4138. [2021-06-12 15:30:34,901 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 15:30:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-06-12 15:30:34,906 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-06-12 15:30:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:34,906 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-06-12 15:30:34,906 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 15:30:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-06-12 15:30:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:34,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:34,909 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 15:30:35,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 15:30:35,110 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:35,110 INFO L82 PathProgramCache]: Analyzing trace with hash -321603147, now seen corresponding path program 204 times [2021-06-12 15:30:35,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:35,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187435834] [2021-06-12 15:30:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:35,322 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 15:30:35,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:35,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187435834] [2021-06-12 15:30:35,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187435834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:35,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660682847] [2021-06-12 15:30:35,322 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 15:30:35,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:35,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:35,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:35,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:35,545 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 15:30:35,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660682847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:35,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:35,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:30:35,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763973335] [2021-06-12 15:30:35,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:30:35,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:35,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:30:35,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:30:35,546 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 15:30:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:36,314 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-06-12 15:30:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:30:36,315 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 15:30:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:36,321 INFO L225 Difference]: With dead ends: 5908 [2021-06-12 15:30:36,321 INFO L226 Difference]: Without dead ends: 5638 [2021-06-12 15:30:36,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 755.9ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:30:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-12 15:30:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-06-12 15:30:36,359 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 15:30:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-06-12 15:30:36,364 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-06-12 15:30:36,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:36,364 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-06-12 15:30:36,364 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 15:30:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-06-12 15:30:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:30:36,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:36,367 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 15:30:36,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-12 15:30:36,568 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:36,568 INFO L82 PathProgramCache]: Analyzing trace with hash -299259897, now seen corresponding path program 205 times [2021-06-12 15:30:36,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:36,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780486602] [2021-06-12 15:30:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:36,760 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 15:30:36,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:36,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780486602] [2021-06-12 15:30:36,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780486602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:36,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377577167] [2021-06-12 15:30:36,761 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 15:30:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:36,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:30:36,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:37,021 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 15:30:37,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377577167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:37,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:37,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-06-12 15:30:37,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062840264] [2021-06-12 15:30:37,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:37,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:37,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:37,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:37,023 INFO L87 Difference]: Start difference. First operand 4318 states and 12207 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:38,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:38,082 INFO L93 Difference]: Finished difference Result 5851 states and 15841 transitions. [2021-06-12 15:30:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:30:38,083 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have 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 15:30:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:38,088 INFO L225 Difference]: With dead ends: 5851 [2021-06-12 15:30:38,088 INFO L226 Difference]: Without dead ends: 5276 [2021-06-12 15:30:38,089 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 1025.3ms TimeCoverageRelationStatistics Valid=1449, Invalid=3953, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:30:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-12 15:30:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4353. [2021-06-12 15:30:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:38,131 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 130 [2021-06-12 15:30:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:38,131 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:38,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:38,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:38,134 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 15:30:38,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 15:30:38,335 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:38,335 INFO L82 PathProgramCache]: Analyzing trace with hash 750131032, now seen corresponding path program 206 times [2021-06-12 15:30:38,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:38,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228547564] [2021-06-12 15:30:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:38,585 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 15:30:38,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:38,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228547564] [2021-06-12 15:30:38,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228547564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:38,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121350731] [2021-06-12 15:30:38,586 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 15:30:38,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:38,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:38,856 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 15:30:38,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121350731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:38,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:38,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 15:30:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368058208] [2021-06-12 15:30:38,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:38,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:38,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:38,857 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:39,360 INFO L93 Difference]: Finished difference Result 5696 states and 15097 transitions. [2021-06-12 15:30:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:30:39,361 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 15:30:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:39,366 INFO L225 Difference]: With dead ends: 5696 [2021-06-12 15:30:39,366 INFO L226 Difference]: Without dead ends: 5426 [2021-06-12 15:30:39,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:30:39,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-12 15:30:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4353. [2021-06-12 15:30:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:39,408 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:39,408 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:39,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:39,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:39,411 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 15:30:39,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-12 15:30:39,612 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash 107756616, now seen corresponding path program 207 times [2021-06-12 15:30:39,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:39,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351486216] [2021-06-12 15:30:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:39,874 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 15:30:39,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:39,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351486216] [2021-06-12 15:30:39,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351486216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:39,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407753761] [2021-06-12 15:30:39,874 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 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 15:30:39,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:39,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:39,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:40,129 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 15:30:40,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407753761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:40,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:40,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:40,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003844702] [2021-06-12 15:30:40,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:40,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:40,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:40,130 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 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 15:30:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:40,678 INFO L93 Difference]: Finished difference Result 6141 states and 15987 transitions. [2021-06-12 15:30:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:30:40,678 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 15:30:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:40,683 INFO L225 Difference]: With dead ends: 6141 [2021-06-12 15:30:40,683 INFO L226 Difference]: Without dead ends: 5871 [2021-06-12 15:30:40,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 622.2ms TimeCoverageRelationStatistics Valid=743, Invalid=2227, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:30:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5871 states. [2021-06-12 15:30:40,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5871 to 4353. [2021-06-12 15:30:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:40,723 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:40,723 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:40,723 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 15:30:40,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:40,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:40,726 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 15:30:40,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:40,927 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:40,927 INFO L82 PathProgramCache]: Analyzing trace with hash 61209686, now seen corresponding path program 208 times [2021-06-12 15:30:40,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:40,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102259731] [2021-06-12 15:30:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:41,166 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 15:30:41,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:41,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102259731] [2021-06-12 15:30:41,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102259731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:41,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907450101] [2021-06-12 15:30:41,166 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 15:30:41,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:41,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:41,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:41,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:41,391 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 15:30:41,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907450101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:41,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:41,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 15:30:41,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59525696] [2021-06-12 15:30:41,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:41,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:41,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:41,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:41,393 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:41,891 INFO L93 Difference]: Finished difference Result 6096 states and 15897 transitions. [2021-06-12 15:30:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:30:41,891 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 15:30:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:41,897 INFO L225 Difference]: With dead ends: 6096 [2021-06-12 15:30:41,897 INFO L226 Difference]: Without dead ends: 5826 [2021-06-12 15:30:41,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=741, Invalid=2229, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:30:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-12 15:30:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 4353. [2021-06-12 15:30:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:41,939 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:41,939 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:41,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:41,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:41,942 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 15:30:42,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-12 15:30:42,143 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:42,143 INFO L82 PathProgramCache]: Analyzing trace with hash -857174714, now seen corresponding path program 209 times [2021-06-12 15:30:42,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:42,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395956546] [2021-06-12 15:30:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:42,416 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 15:30:42,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:42,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395956546] [2021-06-12 15:30:42,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395956546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:42,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000597948] [2021-06-12 15:30:42,417 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 15:30:42,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:42,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:42,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:42,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:42,671 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 15:30:42,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000597948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:42,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:42,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:42,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434065813] [2021-06-12 15:30:42,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:42,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:42,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:42,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:42,672 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 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 15:30:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:43,286 INFO L93 Difference]: Finished difference Result 6046 states and 15797 transitions. [2021-06-12 15:30:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:30:43,286 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 15:30:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:43,292 INFO L225 Difference]: With dead ends: 6046 [2021-06-12 15:30:43,292 INFO L226 Difference]: Without dead ends: 5776 [2021-06-12 15:30:43,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 673.0ms TimeCoverageRelationStatistics Valid=763, Invalid=2429, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:30:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5776 states. [2021-06-12 15:30:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5776 to 4353. [2021-06-12 15:30:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:43,336 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:43,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:43,336 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:43,336 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 15:30:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:43,340 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:43,340 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 15:30:43,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:43,540 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:43,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1661101780, now seen corresponding path program 210 times [2021-06-12 15:30:43,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:43,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951398470] [2021-06-12 15:30:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:43,802 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 15:30:43,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951398470] [2021-06-12 15:30:43,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951398470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923076499] [2021-06-12 15:30:43,803 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 15:30:43,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:43,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:43,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:44,085 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 15:30:44,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923076499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:44,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:44,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 15:30:44,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154495642] [2021-06-12 15:30:44,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:44,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:44,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:44,087 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:44,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:44,632 INFO L93 Difference]: Finished difference Result 5996 states and 15697 transitions. [2021-06-12 15:30:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:30:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 15:30:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:44,638 INFO L225 Difference]: With dead ends: 5996 [2021-06-12 15:30:44,638 INFO L226 Difference]: Without dead ends: 5726 [2021-06-12 15:30:44,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 615.0ms TimeCoverageRelationStatistics Valid=775, Invalid=2417, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:30:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2021-06-12 15:30:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 4353. [2021-06-12 15:30:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:44,678 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:44,678 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:44,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:44,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:44,682 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 15:30:44,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:44,882 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:44,882 INFO L82 PathProgramCache]: Analyzing trace with hash -534223932, now seen corresponding path program 211 times [2021-06-12 15:30:44,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:44,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50287712] [2021-06-12 15:30:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:45,116 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 15:30:45,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:45,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50287712] [2021-06-12 15:30:45,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50287712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:45,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511945275] [2021-06-12 15:30:45,116 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 15:30:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:45,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:45,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:45,362 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 15:30:45,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511945275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:45,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:45,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:45,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141946996] [2021-06-12 15:30:45,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:45,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:45,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:45,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:45,363 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 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 15:30:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:46,044 INFO L93 Difference]: Finished difference Result 5946 states and 15597 transitions. [2021-06-12 15:30:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:30:46,044 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 15:30:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:46,049 INFO L225 Difference]: With dead ends: 5946 [2021-06-12 15:30:46,049 INFO L226 Difference]: Without dead ends: 5676 [2021-06-12 15:30:46,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=799, Invalid=2623, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:30:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-12 15:30:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4353. [2021-06-12 15:30:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:46,089 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:46,089 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:46,090 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 15:30:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:46,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:46,093 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 15:30:46,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:46,293 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash 975976146, now seen corresponding path program 212 times [2021-06-12 15:30:46,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:46,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906179477] [2021-06-12 15:30:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:46,538 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 15:30:46,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:46,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906179477] [2021-06-12 15:30:46,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906179477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:46,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750655108] [2021-06-12 15:30:46,538 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 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 15:30:46,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:46,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:46,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:46,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:46,764 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 15:30:46,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750655108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:46,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:46,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 15:30:46,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219952335] [2021-06-12 15:30:46,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:46,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:46,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:46,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:46,765 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:47,349 INFO L93 Difference]: Finished difference Result 5896 states and 15497 transitions. [2021-06-12 15:30:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:30:47,349 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 15:30:47,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:47,355 INFO L225 Difference]: With dead ends: 5896 [2021-06-12 15:30:47,355 INFO L226 Difference]: Without dead ends: 5626 [2021-06-12 15:30:47,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 624.5ms TimeCoverageRelationStatistics Valid=825, Invalid=2597, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:30:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-12 15:30:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4353. [2021-06-12 15:30:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:47,431 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:47,431 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:47,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:47,434 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:47,434 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 15:30:47,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:47,635 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1615634370, now seen corresponding path program 213 times [2021-06-12 15:30:47,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:47,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853132046] [2021-06-12 15:30:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:47,890 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 15:30:47,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:47,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853132046] [2021-06-12 15:30:47,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853132046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:47,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166622543] [2021-06-12 15:30:47,890 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 15:30:47,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:47,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:47,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:47,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:48,144 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 15:30:48,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166622543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:48,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:48,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:48,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399974353] [2021-06-12 15:30:48,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:48,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:48,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:48,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:48,145 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 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 15:30:48,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:48,880 INFO L93 Difference]: Finished difference Result 5846 states and 15397 transitions. [2021-06-12 15:30:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:30:48,880 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 15:30:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:48,886 INFO L225 Difference]: With dead ends: 5846 [2021-06-12 15:30:48,886 INFO L226 Difference]: Without dead ends: 5576 [2021-06-12 15:30:48,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 760.5ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:30:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-06-12 15:30:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4353. [2021-06-12 15:30:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:48,928 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:48,928 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:48,928 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 15:30:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:48,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:48,931 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 15:30:49,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 15:30:49,133 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash 840715344, now seen corresponding path program 214 times [2021-06-12 15:30:49,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:49,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303322518] [2021-06-12 15:30:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:49,378 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 15:30:49,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:49,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303322518] [2021-06-12 15:30:49,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303322518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:49,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560666451] [2021-06-12 15:30:49,379 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 15:30:49,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:49,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:49,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:49,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:49,606 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 15:30:49,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560666451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:49,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:49,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 15:30:49,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394948990] [2021-06-12 15:30:49,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:49,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:49,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:49,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:49,607 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:50,238 INFO L93 Difference]: Finished difference Result 5796 states and 15297 transitions. [2021-06-12 15:30:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:30:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 15:30:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:50,244 INFO L225 Difference]: With dead ends: 5796 [2021-06-12 15:30:50,245 INFO L226 Difference]: Without dead ends: 5526 [2021-06-12 15:30:50,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 652.5ms TimeCoverageRelationStatistics Valid=891, Invalid=2769, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:30:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-06-12 15:30:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4353. [2021-06-12 15:30:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:50,286 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:50,286 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:50,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:50,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:50,289 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 15:30:50,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-12 15:30:50,490 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:50,490 INFO L82 PathProgramCache]: Analyzing trace with hash 386801984, now seen corresponding path program 215 times [2021-06-12 15:30:50,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:50,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327074258] [2021-06-12 15:30:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:50,709 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 15:30:50,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:50,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327074258] [2021-06-12 15:30:50,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327074258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:50,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158950965] [2021-06-12 15:30:50,710 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 15:30:50,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:50,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:50,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:50,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [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 15:30:50,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158950965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:50,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:50,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:50,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101344379] [2021-06-12 15:30:50,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:50,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:50,951 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 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 15:30:51,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:51,710 INFO L93 Difference]: Finished difference Result 5746 states and 15197 transitions. [2021-06-12 15:30:51,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:30:51,710 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 15:30:51,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:51,716 INFO L225 Difference]: With dead ends: 5746 [2021-06-12 15:30:51,716 INFO L226 Difference]: Without dead ends: 5476 [2021-06-12 15:30:51,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 769.2ms TimeCoverageRelationStatistics Valid=919, Invalid=2987, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:30:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-12 15:30:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 4353. [2021-06-12 15:30:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:51,761 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:51,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:51,761 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:51,761 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 15:30:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:51,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:51,765 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:51,765 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 15:30:51,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-12 15:30:51,969 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:51,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:51,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1264813902, now seen corresponding path program 216 times [2021-06-12 15:30:51,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:51,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320700516] [2021-06-12 15:30:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:52,219 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 15:30:52,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:52,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320700516] [2021-06-12 15:30:52,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320700516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:52,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773956870] [2021-06-12 15:30:52,219 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 15:30:52,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:30:52,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:52,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:52,510 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 15:30:52,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773956870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:52,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:52,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 15:30:52,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146009076] [2021-06-12 15:30:52,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:52,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:52,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:52,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:52,512 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:53,186 INFO L93 Difference]: Finished difference Result 5696 states and 15097 transitions. [2021-06-12 15:30:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:30:53,187 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 15:30:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:53,191 INFO L225 Difference]: With dead ends: 5696 [2021-06-12 15:30:53,191 INFO L226 Difference]: Without dead ends: 5426 [2021-06-12 15:30:53,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 706.0ms TimeCoverageRelationStatistics Valid=973, Invalid=2933, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:30:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-12 15:30:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4353. [2021-06-12 15:30:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:53,245 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:53,246 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:53,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:53,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:53,249 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 15:30:53,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-12 15:30:53,450 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:53,450 INFO L82 PathProgramCache]: Analyzing trace with hash 364759102, now seen corresponding path program 217 times [2021-06-12 15:30:53,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:53,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638010558] [2021-06-12 15:30:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:53,664 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 15:30:53,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:53,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638010558] [2021-06-12 15:30:53,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638010558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:53,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501552493] [2021-06-12 15:30:53,664 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 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 15:30:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:53,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:53,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:53,900 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 15:30:53,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501552493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:53,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:53,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:53,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221490481] [2021-06-12 15:30:53,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:53,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:53,901 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 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 15:30:54,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:54,702 INFO L93 Difference]: Finished difference Result 5646 states and 14997 transitions. [2021-06-12 15:30:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:30:54,702 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 15:30:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:54,708 INFO L225 Difference]: With dead ends: 5646 [2021-06-12 15:30:54,708 INFO L226 Difference]: Without dead ends: 5376 [2021-06-12 15:30:54,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 793.1ms TimeCoverageRelationStatistics Valid=1003, Invalid=3157, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:30:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-12 15:30:54,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4353. [2021-06-12 15:30:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:54,768 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:54,768 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:54,768 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 15:30:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:54,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:54,771 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 15:30:54,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:54,972 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:54,972 INFO L82 PathProgramCache]: Analyzing trace with hash -64305204, now seen corresponding path program 218 times [2021-06-12 15:30:54,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:54,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768847442] [2021-06-12 15:30:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:55,177 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 15:30:55,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:55,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768847442] [2021-06-12 15:30:55,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768847442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:55,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303039208] [2021-06-12 15:30:55,177 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 15:30:55,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:30:55,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:55,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:55,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:55,400 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 15:30:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303039208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:55,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:55,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 15:30:55,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127616629] [2021-06-12 15:30:55,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:55,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:55,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:55,401 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:56,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:56,115 INFO L93 Difference]: Finished difference Result 5596 states and 14897 transitions. [2021-06-12 15:30:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:30:56,116 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 15:30:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:56,121 INFO L225 Difference]: With dead ends: 5596 [2021-06-12 15:30:56,121 INFO L226 Difference]: Without dead ends: 5326 [2021-06-12 15:30:56,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=1071, Invalid=3089, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:30:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-12 15:30:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4353. [2021-06-12 15:30:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:56,170 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:56,170 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:56,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:56,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:56,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:56,173 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 15:30:56,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-12 15:30:56,374 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:56,374 INFO L82 PathProgramCache]: Analyzing trace with hash -750488388, now seen corresponding path program 219 times [2021-06-12 15:30:56,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:56,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291955355] [2021-06-12 15:30:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:56,612 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 15:30:56,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:56,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291955355] [2021-06-12 15:30:56,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291955355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:56,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740003617] [2021-06-12 15:30:56,612 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 15:30:56,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:30:56,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:56,867 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 15:30:56,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740003617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:56,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:56,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:56,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581878021] [2021-06-12 15:30:56,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:56,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:56,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:56,868 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 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 15:30:57,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:57,753 INFO L93 Difference]: Finished difference Result 5546 states and 14797 transitions. [2021-06-12 15:30:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:30:57,754 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 15:30:57,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:57,759 INFO L225 Difference]: With dead ends: 5546 [2021-06-12 15:30:57,759 INFO L226 Difference]: Without dead ends: 5276 [2021-06-12 15:30:57,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 868.9ms TimeCoverageRelationStatistics Valid=1103, Invalid=3319, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:30:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-12 15:30:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4353. [2021-06-12 15:30:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:57,805 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:57,805 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:57,805 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 15:30:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:57,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:57,809 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 15:30:58,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:30:58,009 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:58,010 INFO L82 PathProgramCache]: Analyzing trace with hash -835523126, now seen corresponding path program 220 times [2021-06-12 15:30:58,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:58,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723946349] [2021-06-12 15:30:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:58,216 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 15:30:58,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:58,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723946349] [2021-06-12 15:30:58,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723946349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:58,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280846631] [2021-06-12 15:30:58,217 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 15:30:58,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:30:58,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:58,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:58,463 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 15:30:58,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280846631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:58,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:58,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 15:30:58,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430889350] [2021-06-12 15:30:58,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:30:58,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:58,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:30:58,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:30:58,464 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:59,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:30:59,216 INFO L93 Difference]: Finished difference Result 5496 states and 14697 transitions. [2021-06-12 15:30:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:30:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 15:30:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:30:59,221 INFO L225 Difference]: With dead ends: 5496 [2021-06-12 15:30:59,221 INFO L226 Difference]: Without dead ends: 5226 [2021-06-12 15:30:59,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 719.5ms TimeCoverageRelationStatistics Valid=1185, Invalid=3237, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:30:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-12 15:30:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4353. [2021-06-12 15:30:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:30:59,261 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:30:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:30:59,261 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:30:59,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:30:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:30:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:30:59,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:30:59,264 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 15:30:59,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 15:30:59,465 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:30:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:30:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash -903674182, now seen corresponding path program 221 times [2021-06-12 15:30:59,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:30:59,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581298382] [2021-06-12 15:30:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:30:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:30:59,676 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 15:30:59,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:30:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581298382] [2021-06-12 15:30:59,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581298382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324158926] [2021-06-12 15:30:59,676 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 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 15:30:59,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:30:59,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:30:59,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:30:59,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:30:59,913 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 15:30:59,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324158926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:30:59,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:30:59,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:30:59,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088588252] [2021-06-12 15:30:59,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:30:59,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:30:59,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:30:59,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:30:59,914 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 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 15:31:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:00,829 INFO L93 Difference]: Finished difference Result 5446 states and 14597 transitions. [2021-06-12 15:31:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:31:00,829 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 15:31:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:00,835 INFO L225 Difference]: With dead ends: 5446 [2021-06-12 15:31:00,835 INFO L226 Difference]: Without dead ends: 5176 [2021-06-12 15:31:00,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 892.1ms TimeCoverageRelationStatistics Valid=1219, Invalid=3473, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:31:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-12 15:31:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4353. [2021-06-12 15:31:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:31:00,874 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:31:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:00,874 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:31:00,874 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 15:31:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:31:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:31:00,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:00,877 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 15:31:01,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:01,078 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:01,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2094324040, now seen corresponding path program 222 times [2021-06-12 15:31:01,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:01,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863362442] [2021-06-12 15:31:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:01,283 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 15:31:01,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:01,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863362442] [2021-06-12 15:31:01,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863362442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:01,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569460690] [2021-06-12 15:31:01,284 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 15:31:01,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:31:01,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:01,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:31:01,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:01,510 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 15:31:01,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569460690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:01,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:01,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 15:31:01,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715553079] [2021-06-12 15:31:01,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:31:01,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:01,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:31:01,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:31:01,511 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:02,285 INFO L93 Difference]: Finished difference Result 5396 states and 14497 transitions. [2021-06-12 15:31:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:31:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 15:31:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:02,290 INFO L225 Difference]: With dead ends: 5396 [2021-06-12 15:31:02,290 INFO L226 Difference]: Without dead ends: 5126 [2021-06-12 15:31:02,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=1315, Invalid=3377, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:31:02,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-12 15:31:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4353. [2021-06-12 15:31:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-12 15:31:02,328 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-12 15:31:02,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:02,328 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-12 15:31:02,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-12 15:31:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:31:02,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:02,331 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 15:31:02,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:02,532 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:02,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1770889672, now seen corresponding path program 223 times [2021-06-12 15:31:02,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:02,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174549877] [2021-06-12 15:31:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:02,748 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 15:31:02,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:02,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174549877] [2021-06-12 15:31:02,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174549877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:02,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996096506] [2021-06-12 15:31:02,748 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 15:31:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:31:02,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:02,980 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 15:31:02,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996096506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:02,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:02,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-12 15:31:02,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548092049] [2021-06-12 15:31:02,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 15:31:02,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 15:31:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:31:02,981 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 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 15:31:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:03,944 INFO L93 Difference]: Finished difference Result 5406 states and 14547 transitions. [2021-06-12 15:31:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:31:03,945 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 15:31:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:03,949 INFO L225 Difference]: With dead ends: 5406 [2021-06-12 15:31:03,949 INFO L226 Difference]: Without dead ends: 5136 [2021-06-12 15:31:03,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 941.5ms TimeCoverageRelationStatistics Valid=1351, Invalid=3619, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:31:03,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5136 states. [2021-06-12 15:31:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5136 to 4353. [2021-06-12 15:31:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.823529411764706) internal successors, (12288), 4352 states have internal predecessors, (12288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12288 transitions. [2021-06-12 15:31:03,987 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12288 transitions. Word has length 135 [2021-06-12 15:31:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:03,987 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12288 transitions. [2021-06-12 15:31:03,987 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 15:31:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12288 transitions. [2021-06-12 15:31:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:31:03,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:03,991 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 15:31:04,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:04,191 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:04,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:04,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1828623802, now seen corresponding path program 224 times [2021-06-12 15:31:04,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:04,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489564376] [2021-06-12 15:31:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:04,398 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 15:31:04,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:04,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489564376] [2021-06-12 15:31:04,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489564376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:04,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780599554] [2021-06-12 15:31:04,398 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 15:31:04,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:04,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:31:04,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:04,620 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 15:31:04,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780599554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:04,620 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 [26, 26] total 26 [2021-06-12 15:31:04,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461035883] [2021-06-12 15:31:04,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:31:04,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:04,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:31:04,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:31:04,621 INFO L87 Difference]: Start difference. First operand 4353 states and 12288 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:05,418 INFO L93 Difference]: Finished difference Result 6148 states and 16671 transitions. [2021-06-12 15:31:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:31:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 15:31:05,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:05,424 INFO L225 Difference]: With dead ends: 6148 [2021-06-12 15:31:05,424 INFO L226 Difference]: Without dead ends: 5878 [2021-06-12 15:31:05,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 775.1ms TimeCoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:31:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-06-12 15:31:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 4533. [2021-06-12 15:31:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 2.834730803177405) internal successors, (12847), 4532 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 12847 transitions. [2021-06-12 15:31:05,501 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 12847 transitions. Word has length 135 [2021-06-12 15:31:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:05,501 INFO L482 AbstractCegarLoop]: Abstraction has 4533 states and 12847 transitions. [2021-06-12 15:31:05,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 12847 transitions. [2021-06-12 15:31:05,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:31:05,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:05,505 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 15:31:05,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:05,705 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:05,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1806280552, now seen corresponding path program 225 times [2021-06-12 15:31:05,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:05,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673337331] [2021-06-12 15:31:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:05,912 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 15:31:05,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:05,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673337331] [2021-06-12 15:31:05,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673337331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:05,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630096201] [2021-06-12 15:31:05,913 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 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 15:31:05,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:31:05,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:05,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:31:05,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:06,167 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 15:31:06,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630096201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:06,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:06,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:31:06,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913642649] [2021-06-12 15:31:06,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:06,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:06,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:06,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:06,168 INFO L87 Difference]: Start difference. First operand 4533 states and 12847 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 15:31:07,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:07,209 INFO L93 Difference]: Finished difference Result 6016 states and 16336 transitions. [2021-06-12 15:31:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:31:07,210 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 15:31:07,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:07,215 INFO L225 Difference]: With dead ends: 6016 [2021-06-12 15:31:07,215 INFO L226 Difference]: Without dead ends: 5441 [2021-06-12 15:31:07,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1019.0ms TimeCoverageRelationStatistics Valid=1574, Invalid=4278, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:31:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5441 states. [2021-06-12 15:31:07,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5441 to 2924. [2021-06-12 15:31:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 2.738966814916182) internal successors, (8006), 2923 states have internal predecessors, (8006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 8006 transitions. [2021-06-12 15:31:07,269 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 8006 transitions. Word has length 135 [2021-06-12 15:31:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:07,269 INFO L482 AbstractCegarLoop]: Abstraction has 2924 states and 8006 transitions. [2021-06-12 15:31:07,269 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 15:31:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 8006 transitions. [2021-06-12 15:31:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:07,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:07,272 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 15:31:07,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-12 15:31:07,473 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1580375444, now seen corresponding path program 226 times [2021-06-12 15:31:07,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:07,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416154981] [2021-06-12 15:31:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:07,751 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 15:31:07,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:07,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416154981] [2021-06-12 15:31:07,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416154981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:07,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700133849] [2021-06-12 15:31:07,751 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 15:31:07,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:07,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:08,037 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 15:31:08,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700133849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:08,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:08,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2021-06-12 15:31:08,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815322731] [2021-06-12 15:31:08,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:31:08,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:31:08,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:31:08,038 INFO L87 Difference]: Start difference. First operand 2924 states and 8006 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 15:31:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:08,580 INFO L93 Difference]: Finished difference Result 4114 states and 10706 transitions. [2021-06-12 15:31:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:31:08,581 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 15:31:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:08,584 INFO L225 Difference]: With dead ends: 4114 [2021-06-12 15:31:08,584 INFO L226 Difference]: Without dead ends: 3780 [2021-06-12 15:31:08,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 676.9ms TimeCoverageRelationStatistics Valid=926, Invalid=2496, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:31:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-06-12 15:31:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3009. [2021-06-12 15:31:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.7180851063829787) internal successors, (8176), 3008 states have internal predecessors, (8176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8176 transitions. [2021-06-12 15:31:08,611 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8176 transitions. Word has length 140 [2021-06-12 15:31:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:08,611 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 8176 transitions. [2021-06-12 15:31:08,612 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 15:31:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8176 transitions. [2021-06-12 15:31:08,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:08,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:08,614 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 15:31:08,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-12 15:31:08,815 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:08,815 INFO L82 PathProgramCache]: Analyzing trace with hash 683281208, now seen corresponding path program 227 times [2021-06-12 15:31:08,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:08,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302565810] [2021-06-12 15:31:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:09,107 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 15:31:09,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:09,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302565810] [2021-06-12 15:31:09,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302565810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:09,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297631677] [2021-06-12 15:31:09,107 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 15:31:09,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:09,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:09,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:09,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:09,378 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 15:31:09,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297631677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:09,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:09,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:09,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030340435] [2021-06-12 15:31:09,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:09,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:09,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:09,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:09,380 INFO L87 Difference]: Start difference. First operand 3009 states and 8176 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 15:31:09,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:09,858 INFO L93 Difference]: Finished difference Result 5136 states and 12687 transitions. [2021-06-12 15:31:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:31:09,859 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 15:31:09,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:09,863 INFO L225 Difference]: With dead ends: 5136 [2021-06-12 15:31:09,863 INFO L226 Difference]: Without dead ends: 4866 [2021-06-12 15:31:09,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 611.8ms TimeCoverageRelationStatistics Valid=767, Invalid=1989, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:31:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-12 15:31:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3153. [2021-06-12 15:31:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7262055837563453) internal successors, (8593), 3152 states have internal predecessors, (8593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8593 transitions. [2021-06-12 15:31:09,893 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8593 transitions. Word has length 140 [2021-06-12 15:31:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:09,894 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8593 transitions. [2021-06-12 15:31:09,894 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 15:31:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8593 transitions. [2021-06-12 15:31:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:09,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:09,896 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 15:31:10,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 15:31:10,096 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:10,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1770339288, now seen corresponding path program 228 times [2021-06-12 15:31:10,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:10,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541112487] [2021-06-12 15:31:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:10,378 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 15:31:10,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:10,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541112487] [2021-06-12 15:31:10,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541112487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:10,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634618424] [2021-06-12 15:31:10,379 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 15:31:10,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:10,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:10,658 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 15:31:10,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634618424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:10,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:10,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:10,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196546770] [2021-06-12 15:31:10,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:10,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:10,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:10,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:10,660 INFO L87 Difference]: Start difference. First operand 3153 states and 8593 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 15:31:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:11,234 INFO L93 Difference]: Finished difference Result 5096 states and 12682 transitions. [2021-06-12 15:31:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:31:11,234 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 15:31:11,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:11,238 INFO L225 Difference]: With dead ends: 5096 [2021-06-12 15:31:11,238 INFO L226 Difference]: Without dead ends: 4826 [2021-06-12 15:31:11,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 666.9ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:31:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-06-12 15:31:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 3228. [2021-06-12 15:31:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.732568949488689) internal successors, (8818), 3227 states have internal predecessors, (8818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8818 transitions. [2021-06-12 15:31:11,272 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8818 transitions. Word has length 140 [2021-06-12 15:31:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:11,272 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8818 transitions. [2021-06-12 15:31:11,272 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 15:31:11,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8818 transitions. [2021-06-12 15:31:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:11,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:11,274 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 15:31:11,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:11,475 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash -888780106, now seen corresponding path program 229 times [2021-06-12 15:31:11,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:11,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542144256] [2021-06-12 15:31:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:11,727 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 15:31:11,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:11,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542144256] [2021-06-12 15:31:11,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542144256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:11,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375242836] [2021-06-12 15:31:11,727 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 15:31:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:11,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:11,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:11,990 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 15:31:11,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375242836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:11,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:11,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:11,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45491214] [2021-06-12 15:31:11,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:11,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:11,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:11,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:11,991 INFO L87 Difference]: Start difference. First operand 3228 states and 8818 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 15:31:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:12,489 INFO L93 Difference]: Finished difference Result 5146 states and 12857 transitions. [2021-06-12 15:31:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:31:12,489 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 15:31:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:12,493 INFO L225 Difference]: With dead ends: 5146 [2021-06-12 15:31:12,493 INFO L226 Difference]: Without dead ends: 4876 [2021-06-12 15:31:12,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 593.4ms TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:31:12,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-12 15:31:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 3303. [2021-06-12 15:31:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.7386432465172623) internal successors, (9043), 3302 states have internal predecessors, (9043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9043 transitions. [2021-06-12 15:31:12,550 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9043 transitions. Word has length 140 [2021-06-12 15:31:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:12,550 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9043 transitions. [2021-06-12 15:31:12,550 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 15:31:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9043 transitions. [2021-06-12 15:31:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:12,552 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:12,552 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 15:31:12,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-12 15:31:12,753 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1531154522, now seen corresponding path program 230 times [2021-06-12 15:31:12,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:12,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946851225] [2021-06-12 15:31:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:13,043 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 15:31:13,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:13,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946851225] [2021-06-12 15:31:13,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946851225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:13,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663436921] [2021-06-12 15:31:13,044 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 15:31:13,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:13,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:13,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:13,311 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 15:31:13,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663436921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:13,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:13,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:13,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388761645] [2021-06-12 15:31:13,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:13,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:13,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:13,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:13,312 INFO L87 Difference]: Start difference. First operand 3303 states and 9043 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 15:31:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:13,898 INFO L93 Difference]: Finished difference Result 5171 states and 12982 transitions. [2021-06-12 15:31:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:31:13,898 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 15:31:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:13,902 INFO L225 Difference]: With dead ends: 5171 [2021-06-12 15:31:13,903 INFO L226 Difference]: Without dead ends: 4901 [2021-06-12 15:31:13,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 711.1ms TimeCoverageRelationStatistics Valid=850, Invalid=2572, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:31:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-12 15:31:13,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3378. [2021-06-12 15:31:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.744447734675748) internal successors, (9268), 3377 states have internal predecessors, (9268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9268 transitions. [2021-06-12 15:31:13,936 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9268 transitions. Word has length 140 [2021-06-12 15:31:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:13,936 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9268 transitions. [2021-06-12 15:31:13,936 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 15:31:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9268 transitions. [2021-06-12 15:31:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:13,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:13,938 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 15:31:14,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:14,139 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:14,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:14,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1577701452, now seen corresponding path program 231 times [2021-06-12 15:31:14,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:14,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125384323] [2021-06-12 15:31:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:14,423 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 15:31:14,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:14,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125384323] [2021-06-12 15:31:14,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125384323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:14,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389896201] [2021-06-12 15:31:14,424 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 15:31:14,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:14,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:14,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:14,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:14,745 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 15:31:14,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389896201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:14,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:14,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:14,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655970893] [2021-06-12 15:31:14,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:14,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:14,746 INFO L87 Difference]: Start difference. First operand 3378 states and 9268 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 15:31:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:15,273 INFO L93 Difference]: Finished difference Result 5196 states and 13107 transitions. [2021-06-12 15:31:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:31:15,273 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 15:31:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:15,278 INFO L225 Difference]: With dead ends: 5196 [2021-06-12 15:31:15,278 INFO L226 Difference]: Without dead ends: 4926 [2021-06-12 15:31:15,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 647.6ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:31:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2021-06-12 15:31:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 3453. [2021-06-12 15:31:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.75) internal successors, (9493), 3452 states have internal predecessors, (9493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9493 transitions. [2021-06-12 15:31:15,312 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9493 transitions. Word has length 140 [2021-06-12 15:31:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:15,312 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9493 transitions. [2021-06-12 15:31:15,312 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 15:31:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9493 transitions. [2021-06-12 15:31:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:15,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:15,315 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 15:31:15,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 15:31:15,515 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:15,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1798881444, now seen corresponding path program 232 times [2021-06-12 15:31:15,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:15,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631492168] [2021-06-12 15:31:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:15,782 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 15:31:15,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:15,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631492168] [2021-06-12 15:31:15,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631492168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:15,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916145480] [2021-06-12 15:31:15,783 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 15:31:15,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:15,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:15,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:15,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:16,051 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 15:31:16,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916145480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:16,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:16,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:16,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905718062] [2021-06-12 15:31:16,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:16,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:16,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:16,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:16,052 INFO L87 Difference]: Start difference. First operand 3453 states and 9493 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 15:31:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:16,714 INFO L93 Difference]: Finished difference Result 5221 states and 13232 transitions. [2021-06-12 15:31:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:31:16,714 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 15:31:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:16,719 INFO L225 Difference]: With dead ends: 5221 [2021-06-12 15:31:16,719 INFO L226 Difference]: Without dead ends: 4951 [2021-06-12 15:31:16,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 748.5ms TimeCoverageRelationStatistics Valid=876, Invalid=2784, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:31:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-12 15:31:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3528. [2021-06-12 15:31:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.755316132690672) internal successors, (9718), 3527 states have internal predecessors, (9718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9718 transitions. [2021-06-12 15:31:16,753 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9718 transitions. Word has length 140 [2021-06-12 15:31:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:16,753 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9718 transitions. [2021-06-12 15:31:16,753 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 15:31:16,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9718 transitions. [2021-06-12 15:31:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:16,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:16,756 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 15:31:16,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:16,956 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash 22190642, now seen corresponding path program 233 times [2021-06-12 15:31:16,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:16,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122906358] [2021-06-12 15:31:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:17,190 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 15:31:17,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:17,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122906358] [2021-06-12 15:31:17,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122906358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:17,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969917861] [2021-06-12 15:31:17,191 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 15:31:17,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:17,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:17,454 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 15:31:17,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969917861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:17,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:17,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:17,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936293779] [2021-06-12 15:31:17,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:17,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:17,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:17,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:17,456 INFO L87 Difference]: Start difference. First operand 3528 states and 9718 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 15:31:18,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:18,075 INFO L93 Difference]: Finished difference Result 5246 states and 13357 transitions. [2021-06-12 15:31:18,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:31:18,076 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 15:31:18,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:18,079 INFO L225 Difference]: With dead ends: 5246 [2021-06-12 15:31:18,079 INFO L226 Difference]: Without dead ends: 4976 [2021-06-12 15:31:18,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 676.1ms TimeCoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:31:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-12 15:31:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3603. [2021-06-12 15:31:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 2.7604108828428653) internal successors, (9943), 3602 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 9943 transitions. [2021-06-12 15:31:18,114 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 9943 transitions. Word has length 140 [2021-06-12 15:31:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:18,114 INFO L482 AbstractCegarLoop]: Abstraction has 3603 states and 9943 transitions. [2021-06-12 15:31:18,114 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 15:31:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 9943 transitions. [2021-06-12 15:31:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:18,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:18,117 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 15:31:18,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:18,317 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:18,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2121832226, now seen corresponding path program 234 times [2021-06-12 15:31:18,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:18,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694332647] [2021-06-12 15:31:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:18,588 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 15:31:18,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:18,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694332647] [2021-06-12 15:31:18,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694332647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:18,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148112259] [2021-06-12 15:31:18,589 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 15:31:18,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:18,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:18,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:18,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:18,863 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 15:31:18,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148112259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:18,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:18,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:18,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184493174] [2021-06-12 15:31:18,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:18,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:18,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:18,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:18,865 INFO L87 Difference]: Start difference. First operand 3603 states and 9943 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 15:31:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:19,600 INFO L93 Difference]: Finished difference Result 5271 states and 13482 transitions. [2021-06-12 15:31:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:31:19,600 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 15:31:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:19,605 INFO L225 Difference]: With dead ends: 5271 [2021-06-12 15:31:19,605 INFO L226 Difference]: Without dead ends: 5001 [2021-06-12 15:31:19,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 798.8ms TimeCoverageRelationStatistics Valid=918, Invalid=2988, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:31:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-12 15:31:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 3678. [2021-06-12 15:31:19,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 2.7652977971172152) internal successors, (10168), 3677 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 10168 transitions. [2021-06-12 15:31:19,642 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 10168 transitions. Word has length 140 [2021-06-12 15:31:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:19,642 INFO L482 AbstractCegarLoop]: Abstraction has 3678 states and 10168 transitions. [2021-06-12 15:31:19,643 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 15:31:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 10168 transitions. [2021-06-12 15:31:19,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:19,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:19,646 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 15:31:19,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:19,846 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:19,846 INFO L82 PathProgramCache]: Analyzing trace with hash -662934992, now seen corresponding path program 235 times [2021-06-12 15:31:19,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:19,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384240411] [2021-06-12 15:31:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:20,096 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 15:31:20,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:20,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384240411] [2021-06-12 15:31:20,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384240411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:20,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8066036] [2021-06-12 15:31:20,097 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 15:31:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:20,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:20,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:20,346 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 15:31:20,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8066036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:20,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:20,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:20,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813707803] [2021-06-12 15:31:20,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:20,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:20,347 INFO L87 Difference]: Start difference. First operand 3678 states and 10168 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 15:31:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:20,965 INFO L93 Difference]: Finished difference Result 5296 states and 13607 transitions. [2021-06-12 15:31:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:31:20,965 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 15:31:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:20,971 INFO L225 Difference]: With dead ends: 5296 [2021-06-12 15:31:20,971 INFO L226 Difference]: Without dead ends: 5026 [2021-06-12 15:31:20,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 669.4ms TimeCoverageRelationStatistics Valid=871, Invalid=2789, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:31:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-06-12 15:31:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3753. [2021-06-12 15:31:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 2.76998933901919) internal successors, (10393), 3752 states have internal predecessors, (10393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 10393 transitions. [2021-06-12 15:31:21,011 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 10393 transitions. Word has length 140 [2021-06-12 15:31:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:21,011 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 10393 transitions. [2021-06-12 15:31:21,011 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 15:31:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 10393 transitions. [2021-06-12 15:31:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:21,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:21,014 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 15:31:21,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-12 15:31:21,214 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:21,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:21,215 INFO L82 PathProgramCache]: Analyzing trace with hash -23276768, now seen corresponding path program 236 times [2021-06-12 15:31:21,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:21,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502896697] [2021-06-12 15:31:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:21,454 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 15:31:21,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:21,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502896697] [2021-06-12 15:31:21,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502896697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:21,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773635433] [2021-06-12 15:31:21,454 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 15:31:21,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:21,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:21,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:21,737 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 15:31:21,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773635433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:21,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:21,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:21,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971966613] [2021-06-12 15:31:21,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:21,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:21,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:21,738 INFO L87 Difference]: Start difference. First operand 3753 states and 10393 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 15:31:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:22,515 INFO L93 Difference]: Finished difference Result 5321 states and 13732 transitions. [2021-06-12 15:31:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:31:22,515 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 15:31:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:22,520 INFO L225 Difference]: With dead ends: 5321 [2021-06-12 15:31:22,520 INFO L226 Difference]: Without dead ends: 5051 [2021-06-12 15:31:22,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 818.0ms TimeCoverageRelationStatistics Valid=976, Invalid=3184, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:31:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-12 15:31:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3828. [2021-06-12 15:31:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.7744969950352756) internal successors, (10618), 3827 states have internal predecessors, (10618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 10618 transitions. [2021-06-12 15:31:22,558 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 10618 transitions. Word has length 140 [2021-06-12 15:31:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:22,558 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 10618 transitions. [2021-06-12 15:31:22,558 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 15:31:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 10618 transitions. [2021-06-12 15:31:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:22,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:22,561 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 15:31:22,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-12 15:31:22,762 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:22,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:22,762 INFO L82 PathProgramCache]: Analyzing trace with hash -798195794, now seen corresponding path program 237 times [2021-06-12 15:31:22,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:22,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809009960] [2021-06-12 15:31:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:23,023 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 15:31:23,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:23,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809009960] [2021-06-12 15:31:23,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809009960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:23,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352716370] [2021-06-12 15:31:23,024 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 15:31:23,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:23,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:23,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:23,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:23,318 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 15:31:23,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352716370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:23,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:23,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:23,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047697106] [2021-06-12 15:31:23,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:23,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:23,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:23,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:23,319 INFO L87 Difference]: Start difference. First operand 3828 states and 10618 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 15:31:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:24,014 INFO L93 Difference]: Finished difference Result 5346 states and 13857 transitions. [2021-06-12 15:31:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:31:24,014 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 15:31:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:24,019 INFO L225 Difference]: With dead ends: 5346 [2021-06-12 15:31:24,019 INFO L226 Difference]: Without dead ends: 5076 [2021-06-12 15:31:24,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 732.5ms TimeCoverageRelationStatistics Valid=937, Invalid=2969, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:31:24,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-12 15:31:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3903. [2021-06-12 15:31:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.7788313685289596) internal successors, (10843), 3902 states have internal predecessors, (10843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10843 transitions. [2021-06-12 15:31:24,057 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10843 transitions. Word has length 140 [2021-06-12 15:31:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:24,057 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 10843 transitions. [2021-06-12 15:31:24,057 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 15:31:24,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10843 transitions. [2021-06-12 15:31:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:24,060 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:24,060 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 15:31:24,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-12 15:31:24,261 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:24,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:24,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1252109154, now seen corresponding path program 238 times [2021-06-12 15:31:24,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:24,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353944543] [2021-06-12 15:31:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:24,490 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 15:31:24,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:24,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353944543] [2021-06-12 15:31:24,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353944543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:24,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574087851] [2021-06-12 15:31:24,491 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 15:31:24,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:24,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:24,773 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 15:31:24,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574087851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:24,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:24,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:24,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296739120] [2021-06-12 15:31:24,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:24,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:24,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:24,774 INFO L87 Difference]: Start difference. First operand 3903 states and 10843 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 15:31:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:25,623 INFO L93 Difference]: Finished difference Result 5371 states and 13982 transitions. [2021-06-12 15:31:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:31:25,623 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 15:31:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:25,628 INFO L225 Difference]: With dead ends: 5371 [2021-06-12 15:31:25,628 INFO L226 Difference]: Without dead ends: 5101 [2021-06-12 15:31:25,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 853.4ms TimeCoverageRelationStatistics Valid=1050, Invalid=3372, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:31:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-12 15:31:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3978. [2021-06-12 15:31:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 2.783002263012321) internal successors, (11068), 3977 states have internal predecessors, (11068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 11068 transitions. [2021-06-12 15:31:25,667 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 11068 transitions. Word has length 140 [2021-06-12 15:31:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:25,667 INFO L482 AbstractCegarLoop]: Abstraction has 3978 states and 11068 transitions. [2021-06-12 15:31:25,667 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 15:31:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 11068 transitions. [2021-06-12 15:31:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:25,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:25,670 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 15:31:25,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-12 15:31:25,871 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:25,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:25,871 INFO L82 PathProgramCache]: Analyzing trace with hash -374097236, now seen corresponding path program 239 times [2021-06-12 15:31:25,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:25,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388092497] [2021-06-12 15:31:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:26,103 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 15:31:26,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:26,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388092497] [2021-06-12 15:31:26,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388092497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:26,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690492304] [2021-06-12 15:31:26,103 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 15:31:26,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:26,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:26,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:26,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:26,358 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 15:31:26,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690492304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:26,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:26,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:26,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834231244] [2021-06-12 15:31:26,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:26,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:26,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:26,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:26,360 INFO L87 Difference]: Start difference. First operand 3978 states and 11068 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 15:31:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:27,096 INFO L93 Difference]: Finished difference Result 5396 states and 14107 transitions. [2021-06-12 15:31:27,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:31:27,097 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 15:31:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:27,101 INFO L225 Difference]: With dead ends: 5396 [2021-06-12 15:31:27,101 INFO L226 Difference]: Without dead ends: 5126 [2021-06-12 15:31:27,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 762.3ms TimeCoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:31:27,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-12 15:31:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4053. [2021-06-12 15:31:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 2.7870187561697928) internal successors, (11293), 4052 states have internal predecessors, (11293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 11293 transitions. [2021-06-12 15:31:27,140 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 11293 transitions. Word has length 140 [2021-06-12 15:31:27,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:27,140 INFO L482 AbstractCegarLoop]: Abstraction has 4053 states and 11293 transitions. [2021-06-12 15:31:27,140 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 15:31:27,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 11293 transitions. [2021-06-12 15:31:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:27,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:27,143 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 15:31:27,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-12 15:31:27,344 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:27,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:27,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1274152036, now seen corresponding path program 240 times [2021-06-12 15:31:27,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:27,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026047909] [2021-06-12 15:31:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:27,572 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 15:31:27,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:27,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026047909] [2021-06-12 15:31:27,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026047909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:27,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774886038] [2021-06-12 15:31:27,573 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 15:31:27,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:27,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:27,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:27,843 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 15:31:27,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774886038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:27,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:27,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:27,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890624789] [2021-06-12 15:31:27,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:27,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:27,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:27,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:27,845 INFO L87 Difference]: Start difference. First operand 4053 states and 11293 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 15:31:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:28,766 INFO L93 Difference]: Finished difference Result 5421 states and 14232 transitions. [2021-06-12 15:31:28,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:31:28,766 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 15:31:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:28,770 INFO L225 Difference]: With dead ends: 5421 [2021-06-12 15:31:28,770 INFO L226 Difference]: Without dead ends: 5151 [2021-06-12 15:31:28,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 919.5ms TimeCoverageRelationStatistics Valid=1140, Invalid=3552, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:31:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-12 15:31:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4128. [2021-06-12 15:31:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 2.790889265810516) internal successors, (11518), 4127 states have internal predecessors, (11518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 11518 transitions. [2021-06-12 15:31:28,810 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 11518 transitions. Word has length 140 [2021-06-12 15:31:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:28,810 INFO L482 AbstractCegarLoop]: Abstraction has 4128 states and 11518 transitions. [2021-06-12 15:31:28,810 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 15:31:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 11518 transitions. [2021-06-12 15:31:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:28,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:28,813 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 15:31:29,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:29,014 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:29,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1703216342, now seen corresponding path program 241 times [2021-06-12 15:31:29,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:29,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917951202] [2021-06-12 15:31:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:29,233 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 15:31:29,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:29,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917951202] [2021-06-12 15:31:29,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917951202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:29,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839211580] [2021-06-12 15:31:29,233 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 15:31:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:29,476 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 15:31:29,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839211580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:29,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:29,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:29,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222308338] [2021-06-12 15:31:29,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:29,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:29,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:29,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:29,477 INFO L87 Difference]: Start difference. First operand 4128 states and 11518 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 15:31:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:30,263 INFO L93 Difference]: Finished difference Result 5446 states and 14357 transitions. [2021-06-12 15:31:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:31:30,263 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 15:31:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:30,268 INFO L225 Difference]: With dead ends: 5446 [2021-06-12 15:31:30,268 INFO L226 Difference]: Without dead ends: 5176 [2021-06-12 15:31:30,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 756.2ms TimeCoverageRelationStatistics Valid=1117, Invalid=3305, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:31:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-12 15:31:30,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4203. [2021-06-12 15:31:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4203 states, 4202 states have (on average 2.7946216087577342) internal successors, (11743), 4202 states have internal predecessors, (11743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4203 states to 4203 states and 11743 transitions. [2021-06-12 15:31:30,312 INFO L78 Accepts]: Start accepts. Automaton has 4203 states and 11743 transitions. Word has length 140 [2021-06-12 15:31:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:30,312 INFO L482 AbstractCegarLoop]: Abstraction has 4203 states and 11743 transitions. [2021-06-12 15:31:30,312 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 15:31:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4203 states and 11743 transitions. [2021-06-12 15:31:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:30,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:30,337 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 15:31:30,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-12 15:31:30,541 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1905567770, now seen corresponding path program 242 times [2021-06-12 15:31:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:30,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514646794] [2021-06-12 15:31:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:30,763 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 15:31:30,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:30,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514646794] [2021-06-12 15:31:30,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514646794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:30,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627579409] [2021-06-12 15:31:30,763 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 15:31:30,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:30,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:30,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:30,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:31,023 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 15:31:31,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627579409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:31,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:31,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:31,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227181146] [2021-06-12 15:31:31,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:31,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:31,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:31,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:31,024 INFO L87 Difference]: Start difference. First operand 4203 states and 11743 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 15:31:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:31,985 INFO L93 Difference]: Finished difference Result 5471 states and 14482 transitions. [2021-06-12 15:31:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:31:31,986 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 15:31:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:31,991 INFO L225 Difference]: With dead ends: 5471 [2021-06-12 15:31:31,991 INFO L226 Difference]: Without dead ends: 5201 [2021-06-12 15:31:31,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 940.7ms TimeCoverageRelationStatistics Valid=1246, Invalid=3724, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:31:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-12 15:31:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 4278. [2021-06-12 15:31:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4278 states, 4277 states have (on average 2.7982230535422024) internal successors, (11968), 4277 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4278 states to 4278 states and 11968 transitions. [2021-06-12 15:31:32,034 INFO L78 Accepts]: Start accepts. Automaton has 4278 states and 11968 transitions. Word has length 140 [2021-06-12 15:31:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:32,034 INFO L482 AbstractCegarLoop]: Abstraction has 4278 states and 11968 transitions. [2021-06-12 15:31:32,034 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 15:31:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4278 states and 11968 transitions. [2021-06-12 15:31:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:32,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:32,037 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 15:31:32,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:32,238 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:32,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:32,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1820533032, now seen corresponding path program 243 times [2021-06-12 15:31:32,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:32,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311778487] [2021-06-12 15:31:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:32,489 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 15:31:32,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:32,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311778487] [2021-06-12 15:31:32,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311778487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:32,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964734947] [2021-06-12 15:31:32,489 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 15:31:32,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:32,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:32,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:32,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:32,738 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 15:31:32,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964734947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:32,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:32,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:32,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980738368] [2021-06-12 15:31:32,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:32,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:32,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:32,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:32,740 INFO L87 Difference]: Start difference. First operand 4278 states and 11968 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 15:31:33,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:33,540 INFO L93 Difference]: Finished difference Result 5496 states and 14607 transitions. [2021-06-12 15:31:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:31:33,541 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 15:31:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:33,546 INFO L225 Difference]: With dead ends: 5496 [2021-06-12 15:31:33,546 INFO L226 Difference]: Without dead ends: 5226 [2021-06-12 15:31:33,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 797.7ms TimeCoverageRelationStatistics Valid=1231, Invalid=3461, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:31:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-12 15:31:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4353. [2021-06-12 15:31:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.801700367647059) internal successors, (12193), 4352 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12193 transitions. [2021-06-12 15:31:33,590 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12193 transitions. Word has length 140 [2021-06-12 15:31:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:33,590 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12193 transitions. [2021-06-12 15:31:33,590 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 15:31:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12193 transitions. [2021-06-12 15:31:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:33,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:33,594 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 15:31:33,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:33,794 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:33,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:33,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1752381976, now seen corresponding path program 244 times [2021-06-12 15:31:33,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:33,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070146985] [2021-06-12 15:31:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:34,041 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 15:31:34,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:34,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070146985] [2021-06-12 15:31:34,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070146985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:34,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499133982] [2021-06-12 15:31:34,042 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 15:31:34,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:34,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:34,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:34,335 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 15:31:34,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499133982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:34,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:34,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:34,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586129439] [2021-06-12 15:31:34,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:34,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:34,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:34,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:34,336 INFO L87 Difference]: Start difference. First operand 4353 states and 12193 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 15:31:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:35,331 INFO L93 Difference]: Finished difference Result 5521 states and 14732 transitions. [2021-06-12 15:31:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:31:35,331 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 15:31:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:35,337 INFO L225 Difference]: With dead ends: 5521 [2021-06-12 15:31:35,337 INFO L226 Difference]: Without dead ends: 5251 [2021-06-12 15:31:35,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 987.3ms TimeCoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:31:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-12 15:31:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4428. [2021-06-12 15:31:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 2.805059859950305) internal successors, (12418), 4427 states have internal predecessors, (12418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 12418 transitions. [2021-06-12 15:31:35,384 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 12418 transitions. Word has length 140 [2021-06-12 15:31:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:35,384 INFO L482 AbstractCegarLoop]: Abstraction has 4428 states and 12418 transitions. [2021-06-12 15:31:35,384 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 15:31:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 12418 transitions. [2021-06-12 15:31:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:35,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:35,388 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 15:31:35,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:35,589 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:35,589 INFO L82 PathProgramCache]: Analyzing trace with hash 455412902, now seen corresponding path program 245 times [2021-06-12 15:31:35,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:35,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770881961] [2021-06-12 15:31:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:35,940 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 15:31:35,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:35,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770881961] [2021-06-12 15:31:35,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770881961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:35,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242472193] [2021-06-12 15:31:35,941 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 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 15:31:36,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:36,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:36,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:36,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:36,179 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 15:31:36,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242472193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:36,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:36,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:36,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190785069] [2021-06-12 15:31:36,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:36,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:36,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:36,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:36,181 INFO L87 Difference]: Start difference. First operand 4428 states and 12418 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 15:31:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:37,011 INFO L93 Difference]: Finished difference Result 5591 states and 14977 transitions. [2021-06-12 15:31:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:31:37,011 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 15:31:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:37,017 INFO L225 Difference]: With dead ends: 5591 [2021-06-12 15:31:37,017 INFO L226 Difference]: Without dead ends: 5321 [2021-06-12 15:31:37,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 880.5ms TimeCoverageRelationStatistics Valid=1361, Invalid=3609, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:31:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5321 states. [2021-06-12 15:31:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5321 to 4503. [2021-06-12 15:31:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 2.8116392714349177) internal successors, (12658), 4502 states have internal predecessors, (12658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 12658 transitions. [2021-06-12 15:31:37,065 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 12658 transitions. Word has length 140 [2021-06-12 15:31:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:37,065 INFO L482 AbstractCegarLoop]: Abstraction has 4503 states and 12658 transitions. [2021-06-12 15:31:37,065 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 15:31:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 12658 transitions. [2021-06-12 15:31:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:37,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:37,069 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 15:31:37,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:37,270 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:37,271 INFO L82 PathProgramCache]: Analyzing trace with hash 885166486, now seen corresponding path program 246 times [2021-06-12 15:31:37,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:37,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850030063] [2021-06-12 15:31:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:37,491 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 15:31:37,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:37,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850030063] [2021-06-12 15:31:37,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850030063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:37,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51528802] [2021-06-12 15:31:37,491 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 15:31:37,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:37,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:37,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:37,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:37,779 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 15:31:37,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51528802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:37,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:37,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:37,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905414916] [2021-06-12 15:31:37,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:37,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:37,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:37,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:37,780 INFO L87 Difference]: Start difference. First operand 4503 states and 12658 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 15:31:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:38,906 INFO L93 Difference]: Finished difference Result 6169 states and 16603 transitions. [2021-06-12 15:31:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:31:38,907 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 15:31:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:38,913 INFO L225 Difference]: With dead ends: 6169 [2021-06-12 15:31:38,913 INFO L226 Difference]: Without dead ends: 5546 [2021-06-12 15:31:38,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 1073.8ms TimeCoverageRelationStatistics Valid=1529, Invalid=4323, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:31:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-06-12 15:31:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4578. [2021-06-12 15:31:38,951 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 15:31:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12888 transitions. [2021-06-12 15:31:38,957 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12888 transitions. Word has length 140 [2021-06-12 15:31:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:38,957 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12888 transitions. [2021-06-12 15:31:38,957 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 15:31:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12888 transitions. [2021-06-12 15:31:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:38,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:38,962 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 15:31:39,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-12 15:31:39,163 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash 827432356, now seen corresponding path program 247 times [2021-06-12 15:31:39,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:39,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104259123] [2021-06-12 15:31:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:39,412 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 15:31:39,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:39,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104259123] [2021-06-12 15:31:39,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104259123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:39,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788517825] [2021-06-12 15:31:39,413 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 15:31:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:39,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:39,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:39,645 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 15:31:39,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788517825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:39,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:39,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-12 15:31:39,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338834869] [2021-06-12 15:31:39,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:31:39,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:39,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:31:39,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:31:39,646 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 15:31:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:40,515 INFO L93 Difference]: Finished difference Result 6398 states and 17321 transitions. [2021-06-12 15:31:40,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:31:40,516 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 15:31:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:40,522 INFO L225 Difference]: With dead ends: 6398 [2021-06-12 15:31:40,522 INFO L226 Difference]: Without dead ends: 6128 [2021-06-12 15:31:40,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 879.5ms TimeCoverageRelationStatistics Valid=1508, Invalid=3748, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:31:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-06-12 15:31:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 4758. [2021-06-12 15:31:40,571 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 15:31:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 13447 transitions. [2021-06-12 15:31:40,578 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 13447 transitions. Word has length 140 [2021-06-12 15:31:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:40,578 INFO L482 AbstractCegarLoop]: Abstraction has 4758 states and 13447 transitions. [2021-06-12 15:31:40,578 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 15:31:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 13447 transitions. [2021-06-12 15:31:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-12 15:31:40,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:40,582 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 15:31:40,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-12 15:31:40,785 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash 849775606, now seen corresponding path program 248 times [2021-06-12 15:31:40,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:40,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106171134] [2021-06-12 15:31:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:40,998 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 15:31:40,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:40,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106171134] [2021-06-12 15:31:40,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106171134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:40,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201237070] [2021-06-12 15:31:40,999 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 15:31:41,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:41,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:41,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 15:31:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:41,279 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 15:31:41,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201237070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:41,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:41,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-12 15:31:41,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712282013] [2021-06-12 15:31:41,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:41,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:41,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:41,281 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 15:31:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:42,415 INFO L93 Difference]: Finished difference Result 6221 states and 16821 transitions. [2021-06-12 15:31:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:31:42,415 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 15:31:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:42,421 INFO L225 Difference]: With dead ends: 6221 [2021-06-12 15:31:42,421 INFO L226 Difference]: Without dead ends: 5646 [2021-06-12 15:31:42,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 1120.5ms TimeCoverageRelationStatistics Valid=1708, Invalid=4612, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:31:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-06-12 15:31:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 3203. [2021-06-12 15:31:42,456 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 15:31:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8768 transitions. [2021-06-12 15:31:42,460 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8768 transitions. Word has length 140 [2021-06-12 15:31:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:42,460 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8768 transitions. [2021-06-12 15:31:42,460 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 15:31:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8768 transitions. [2021-06-12 15:31:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:42,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:42,462 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 15:31:42,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 15:31:42,663 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1739326839, now seen corresponding path program 249 times [2021-06-12 15:31:42,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:42,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053668985] [2021-06-12 15:31:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:42,970 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 15:31:42,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:42,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053668985] [2021-06-12 15:31:42,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053668985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:42,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591967603] [2021-06-12 15:31:42,971 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 15:31:43,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:43,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:43,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:43,243 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 15:31:43,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591967603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:43,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:43,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:43,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53894719] [2021-06-12 15:31:43,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:43,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:43,244 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 15:31:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:43,766 INFO L93 Difference]: Finished difference Result 4721 states and 12007 transitions. [2021-06-12 15:31:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:31:43,766 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 15:31:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:43,770 INFO L225 Difference]: With dead ends: 4721 [2021-06-12 15:31:43,770 INFO L226 Difference]: Without dead ends: 4451 [2021-06-12 15:31:43,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 656.5ms TimeCoverageRelationStatistics Valid=844, Invalid=2348, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:31:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-12 15:31:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3278. [2021-06-12 15:31:43,798 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 15:31:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 8993 transitions. [2021-06-12 15:31:43,802 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 8993 transitions. Word has length 145 [2021-06-12 15:31:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:43,802 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 8993 transitions. [2021-06-12 15:31:43,802 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 15:31:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 8993 transitions. [2021-06-12 15:31:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:43,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:43,804 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 15:31:44,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-12 15:31:44,005 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash 102019961, now seen corresponding path program 250 times [2021-06-12 15:31:44,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:44,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171516549] [2021-06-12 15:31:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:44,427 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 15:31:44,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:44,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171516549] [2021-06-12 15:31:44,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171516549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:44,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403658718] [2021-06-12 15:31:44,427 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 15:31:44,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:44,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:44,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:44,840 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 15:31:44,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403658718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:44,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:44,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:44,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62520864] [2021-06-12 15:31:44,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:44,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:44,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:44,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:44,841 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 15:31:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:45,525 INFO L93 Difference]: Finished difference Result 5291 states and 13222 transitions. [2021-06-12 15:31:45,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:31:45,525 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 15:31:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:45,531 INFO L225 Difference]: With dead ends: 5291 [2021-06-12 15:31:45,531 INFO L226 Difference]: Without dead ends: 5021 [2021-06-12 15:31:45,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 910.3ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:31:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-06-12 15:31:45,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 3353. [2021-06-12 15:31:45,581 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 15:31:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9218 transitions. [2021-06-12 15:31:45,589 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9218 transitions. Word has length 145 [2021-06-12 15:31:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:45,590 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9218 transitions. [2021-06-12 15:31:45,590 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 15:31:45,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9218 transitions. [2021-06-12 15:31:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:45,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:45,593 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 15:31:45,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:45,814 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:45,814 INFO L82 PathProgramCache]: Analyzing trace with hash 983579143, now seen corresponding path program 251 times [2021-06-12 15:31:45,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:45,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192002984] [2021-06-12 15:31:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:46,226 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 15:31:46,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:46,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192002984] [2021-06-12 15:31:46,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192002984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:46,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230518413] [2021-06-12 15:31:46,227 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 15:31:46,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:46,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:46,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:46,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:46,497 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 15:31:46,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230518413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:46,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:46,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:46,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138775062] [2021-06-12 15:31:46,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:46,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:46,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:46,498 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 15:31:47,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:47,058 INFO L93 Difference]: Finished difference Result 5321 states and 13357 transitions. [2021-06-12 15:31:47,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:31:47,058 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 15:31:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:47,063 INFO L225 Difference]: With dead ends: 5321 [2021-06-12 15:31:47,063 INFO L226 Difference]: Without dead ends: 5051 [2021-06-12 15:31:47,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 764.2ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:31:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-12 15:31:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3428. [2021-06-12 15:31:47,092 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 15:31:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9443 transitions. [2021-06-12 15:31:47,096 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9443 transitions. Word has length 145 [2021-06-12 15:31:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:47,096 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9443 transitions. [2021-06-12 15:31:47,096 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 15:31:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9443 transitions. [2021-06-12 15:31:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:47,099 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:47,099 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 15:31:47,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-12 15:31:47,299 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash 341204727, now seen corresponding path program 252 times [2021-06-12 15:31:47,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:47,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237325183] [2021-06-12 15:31:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:47,581 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 15:31:47,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:47,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237325183] [2021-06-12 15:31:47,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237325183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:47,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847664974] [2021-06-12 15:31:47,582 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 15:31:47,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:47,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:47,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:47,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:47,868 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 15:31:47,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847664974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:47,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:47,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:47,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459439168] [2021-06-12 15:31:47,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:47,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:47,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:47,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:47,869 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 15:31:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:48,501 INFO L93 Difference]: Finished difference Result 5346 states and 13482 transitions. [2021-06-12 15:31:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:31:48,501 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 15:31:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:48,506 INFO L225 Difference]: With dead ends: 5346 [2021-06-12 15:31:48,506 INFO L226 Difference]: Without dead ends: 5076 [2021-06-12 15:31:48,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 741.7ms TimeCoverageRelationStatistics Valid=922, Invalid=2860, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:31:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-12 15:31:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3503. [2021-06-12 15:31:48,557 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 15:31:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9668 transitions. [2021-06-12 15:31:48,561 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9668 transitions. Word has length 145 [2021-06-12 15:31:48,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:48,561 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9668 transitions. [2021-06-12 15:31:48,561 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 15:31:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9668 transitions. [2021-06-12 15:31:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:48,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:48,564 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 15:31:48,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:48,764 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:48,764 INFO L82 PathProgramCache]: Analyzing trace with hash 294657797, now seen corresponding path program 253 times [2021-06-12 15:31:48,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:48,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210365803] [2021-06-12 15:31:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:49,030 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 15:31:49,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:49,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210365803] [2021-06-12 15:31:49,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210365803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:49,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822187201] [2021-06-12 15:31:49,030 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 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 15:31:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:49,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:49,290 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 15:31:49,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822187201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:49,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:49,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:49,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447660430] [2021-06-12 15:31:49,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:49,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:49,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:49,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:49,292 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 15:31:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:49,882 INFO L93 Difference]: Finished difference Result 5371 states and 13607 transitions. [2021-06-12 15:31:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:31:49,882 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 15:31:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:49,887 INFO L225 Difference]: With dead ends: 5371 [2021-06-12 15:31:49,887 INFO L226 Difference]: Without dead ends: 5101 [2021-06-12 15:31:49,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:31:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-12 15:31:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3578. [2021-06-12 15:31:49,923 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 15:31:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9893 transitions. [2021-06-12 15:31:49,927 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9893 transitions. Word has length 145 [2021-06-12 15:31:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:49,927 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9893 transitions. [2021-06-12 15:31:49,928 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 15:31:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9893 transitions. [2021-06-12 15:31:49,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:49,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:49,930 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 15:31:50,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:50,133 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash -623726603, now seen corresponding path program 254 times [2021-06-12 15:31:50,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:50,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674134871] [2021-06-12 15:31:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:50,427 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 15:31:50,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:50,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674134871] [2021-06-12 15:31:50,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674134871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:50,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766768900] [2021-06-12 15:31:50,428 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 15:31:50,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:50,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:50,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:50,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:50,707 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 15:31:50,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766768900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:50,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:50,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:50,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308662408] [2021-06-12 15:31:50,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:50,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:50,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:50,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:50,708 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 15:31:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:51,410 INFO L93 Difference]: Finished difference Result 5396 states and 13732 transitions. [2021-06-12 15:31:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:31:51,411 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 15:31:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:51,416 INFO L225 Difference]: With dead ends: 5396 [2021-06-12 15:31:51,416 INFO L226 Difference]: Without dead ends: 5126 [2021-06-12 15:31:51,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 806.5ms TimeCoverageRelationStatistics Valid=955, Invalid=3077, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:31:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-12 15:31:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3653. [2021-06-12 15:31:51,452 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 15:31:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10118 transitions. [2021-06-12 15:31:51,457 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10118 transitions. Word has length 145 [2021-06-12 15:31:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:51,457 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10118 transitions. [2021-06-12 15:31:51,457 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 15:31:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10118 transitions. [2021-06-12 15:31:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:51,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:51,460 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 15:31:51,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:51,665 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:51,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1894549891, now seen corresponding path program 255 times [2021-06-12 15:31:51,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:51,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484379314] [2021-06-12 15:31:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:51,931 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 15:31:51,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:51,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484379314] [2021-06-12 15:31:51,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484379314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:51,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818968811] [2021-06-12 15:31:51,931 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 15:31:52,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:31:52,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:52,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:52,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:52,221 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 15:31:52,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818968811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:52,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:52,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:52,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009300629] [2021-06-12 15:31:52,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:52,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:52,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:52,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:52,222 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 15:31:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:52,868 INFO L93 Difference]: Finished difference Result 5421 states and 13857 transitions. [2021-06-12 15:31:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:31:52,868 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 15:31:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:52,873 INFO L225 Difference]: With dead ends: 5421 [2021-06-12 15:31:52,873 INFO L226 Difference]: Without dead ends: 5151 [2021-06-12 15:31:52,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:31:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-12 15:31:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3728. [2021-06-12 15:31:52,906 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 15:31:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10343 transitions. [2021-06-12 15:31:52,910 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10343 transitions. Word has length 145 [2021-06-12 15:31:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:52,910 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10343 transitions. [2021-06-12 15:31:52,910 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 15:31:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10343 transitions. [2021-06-12 15:31:52,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:52,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:52,913 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 15:31:53,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:53,114 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:53,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:53,114 INFO L82 PathProgramCache]: Analyzing trace with hash -300775821, now seen corresponding path program 256 times [2021-06-12 15:31:53,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:53,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248833925] [2021-06-12 15:31:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:53,413 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 15:31:53,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:53,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248833925] [2021-06-12 15:31:53,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248833925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:53,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634399642] [2021-06-12 15:31:53,413 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 15:31:53,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:31:53,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:53,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:53,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:53,691 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 15:31:53,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634399642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:53,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:53,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:53,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143630778] [2021-06-12 15:31:53,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:53,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:53,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:53,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:53,692 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 15:31:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:54,450 INFO L93 Difference]: Finished difference Result 5446 states and 13982 transitions. [2021-06-12 15:31:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:31:54,450 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 15:31:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:54,456 INFO L225 Difference]: With dead ends: 5446 [2021-06-12 15:31:54,456 INFO L226 Difference]: Without dead ends: 5176 [2021-06-12 15:31:54,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 866.3ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:31:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-12 15:31:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3803. [2021-06-12 15:31:54,493 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 15:31:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10568 transitions. [2021-06-12 15:31:54,497 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10568 transitions. Word has length 145 [2021-06-12 15:31:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:54,497 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10568 transitions. [2021-06-12 15:31:54,497 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 15:31:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10568 transitions. [2021-06-12 15:31:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:54,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:54,500 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 15:31:54,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:54,701 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1209424257, now seen corresponding path program 257 times [2021-06-12 15:31:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:54,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792586513] [2021-06-12 15:31:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:54,957 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 15:31:54,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:54,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792586513] [2021-06-12 15:31:54,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792586513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:54,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089074464] [2021-06-12 15:31:54,958 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 15:31:55,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:31:55,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:55,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:55,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:55,214 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 15:31:55,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089074464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:55,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:55,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:55,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590142044] [2021-06-12 15:31:55,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:55,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:55,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:55,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:55,215 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 15:31:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:55,922 INFO L93 Difference]: Finished difference Result 5471 states and 14107 transitions. [2021-06-12 15:31:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:31:55,922 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 15:31:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:55,927 INFO L225 Difference]: With dead ends: 5471 [2021-06-12 15:31:55,927 INFO L226 Difference]: Without dead ends: 5201 [2021-06-12 15:31:55,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=1040, Invalid=3250, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:31:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-12 15:31:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 3878. [2021-06-12 15:31:55,961 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 15:31:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10793 transitions. [2021-06-12 15:31:55,965 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10793 transitions. Word has length 145 [2021-06-12 15:31:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:55,965 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10793 transitions. [2021-06-12 15:31:55,965 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 15:31:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10793 transitions. [2021-06-12 15:31:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:55,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:55,968 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 15:31:56,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-12 15:31:56,168 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:56,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:56,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1849082481, now seen corresponding path program 258 times [2021-06-12 15:31:56,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:56,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487897092] [2021-06-12 15:31:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:56,434 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 15:31:56,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:56,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487897092] [2021-06-12 15:31:56,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487897092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:56,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355490629] [2021-06-12 15:31:56,434 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 15:31:56,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:31:56,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:56,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:56,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:56,717 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 15:31:56,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355490629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:56,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:56,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:56,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655157929] [2021-06-12 15:31:56,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:56,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:56,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:56,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:56,718 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 15:31:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:57,541 INFO L93 Difference]: Finished difference Result 5496 states and 14232 transitions. [2021-06-12 15:31:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:31:57,542 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 15:31:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:57,546 INFO L225 Difference]: With dead ends: 5496 [2021-06-12 15:31:57,546 INFO L226 Difference]: Without dead ends: 5226 [2021-06-12 15:31:57,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 846.7ms TimeCoverageRelationStatistics Valid=1069, Invalid=3487, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:31:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-12 15:31:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3953. [2021-06-12 15:31:57,580 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 15:31:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 11018 transitions. [2021-06-12 15:31:57,585 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 11018 transitions. Word has length 145 [2021-06-12 15:31:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:57,585 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 11018 transitions. [2021-06-12 15:31:57,585 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 15:31:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 11018 transitions. [2021-06-12 15:31:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:57,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:57,588 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 15:31:57,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:31:57,789 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:57,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1074163455, now seen corresponding path program 259 times [2021-06-12 15:31:57,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:57,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16188347] [2021-06-12 15:31:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:58,073 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 15:31:58,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:58,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16188347] [2021-06-12 15:31:58,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16188347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:58,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419595220] [2021-06-12 15:31:58,073 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 15:31:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:58,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:58,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:58,324 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 15:31:58,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419595220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:58,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:58,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:31:58,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364021474] [2021-06-12 15:31:58,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:31:58,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:58,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:31:58,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:31:58,325 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 15:31:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:59,069 INFO L93 Difference]: Finished difference Result 5521 states and 14357 transitions. [2021-06-12 15:31:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:31:59,069 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 15:31:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:59,074 INFO L225 Difference]: With dead ends: 5521 [2021-06-12 15:31:59,074 INFO L226 Difference]: Without dead ends: 5251 [2021-06-12 15:31:59,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 786.5ms TimeCoverageRelationStatistics Valid=1119, Invalid=3437, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:31:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-12 15:31:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4028. [2021-06-12 15:31:59,112 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 15:31:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11243 transitions. [2021-06-12 15:31:59,117 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11243 transitions. Word has length 145 [2021-06-12 15:31:59,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:59,117 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11243 transitions. [2021-06-12 15:31:59,117 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 15:31:59,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11243 transitions. [2021-06-12 15:31:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:31:59,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:59,142 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 15:31:59,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-12 15:31:59,343 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:59,343 INFO L82 PathProgramCache]: Analyzing trace with hash 620250095, now seen corresponding path program 260 times [2021-06-12 15:31:59,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:59,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476124300] [2021-06-12 15:31:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:59,601 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 15:31:59,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:59,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476124300] [2021-06-12 15:31:59,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476124300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:59,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212253773] [2021-06-12 15:31:59,602 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 15:31:59,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:31:59,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:31:59,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:31:59,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:31:59,875 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 15:31:59,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212253773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:31:59,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:31:59,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:31:59,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560619225] [2021-06-12 15:31:59,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:31:59,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:59,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:31:59,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:31:59,876 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 15:32:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:00,743 INFO L93 Difference]: Finished difference Result 5546 states and 14482 transitions. [2021-06-12 15:32:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:32:00,744 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 15:32:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:00,749 INFO L225 Difference]: With dead ends: 5546 [2021-06-12 15:32:00,749 INFO L226 Difference]: Without dead ends: 5276 [2021-06-12 15:32:00,749 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 895.8ms TimeCoverageRelationStatistics Valid=1150, Invalid=3680, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:32:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-12 15:32:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4103. [2021-06-12 15:32:00,785 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 15:32:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11468 transitions. [2021-06-12 15:32:00,790 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11468 transitions. Word has length 145 [2021-06-12 15:32:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:00,790 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11468 transitions. [2021-06-12 15:32:00,790 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 15:32:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11468 transitions. [2021-06-12 15:32:00,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:00,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:00,793 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 15:32:00,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-12 15:32:00,994 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:00,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:00,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1498262013, now seen corresponding path program 261 times [2021-06-12 15:32:00,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:00,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458767037] [2021-06-12 15:32:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:01,251 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 15:32:01,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458767037] [2021-06-12 15:32:01,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458767037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809968346] [2021-06-12 15:32:01,252 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 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 15:32:01,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:32:01,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:01,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:01,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:01,509 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 15:32:01,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809968346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:01,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:01,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:32:01,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696014132] [2021-06-12 15:32:01,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:01,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:01,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:01,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:01,510 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 15:32:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:02,271 INFO L93 Difference]: Finished difference Result 5571 states and 14607 transitions. [2021-06-12 15:32:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:32:02,272 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 15:32:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:02,277 INFO L225 Difference]: With dead ends: 5571 [2021-06-12 15:32:02,277 INFO L226 Difference]: Without dead ends: 5301 [2021-06-12 15:32:02,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 777.0ms TimeCoverageRelationStatistics Valid=1214, Invalid=3616, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:32:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-12 15:32:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4178. [2021-06-12 15:32:02,315 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 15:32:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11693 transitions. [2021-06-12 15:32:02,319 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11693 transitions. Word has length 145 [2021-06-12 15:32:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:02,319 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11693 transitions. [2021-06-12 15:32:02,320 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 15:32:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11693 transitions. [2021-06-12 15:32:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:02,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:02,323 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 15:32:02,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:02,523 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:02,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:02,523 INFO L82 PathProgramCache]: Analyzing trace with hash 598207213, now seen corresponding path program 262 times [2021-06-12 15:32:02,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:02,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932848447] [2021-06-12 15:32:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:02,785 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 15:32:02,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:02,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932848447] [2021-06-12 15:32:02,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932848447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:02,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526027267] [2021-06-12 15:32:02,786 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 15:32:02,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:02,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:02,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:02,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:03,064 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 15:32:03,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526027267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:03,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:03,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:32:03,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900235687] [2021-06-12 15:32:03,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:03,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:03,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:03,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:03,066 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 15:32:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:04,035 INFO L93 Difference]: Finished difference Result 5596 states and 14732 transitions. [2021-06-12 15:32:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:32:04,035 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 15:32:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:04,041 INFO L225 Difference]: With dead ends: 5596 [2021-06-12 15:32:04,041 INFO L226 Difference]: Without dead ends: 5326 [2021-06-12 15:32:04,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 981.9ms TimeCoverageRelationStatistics Valid=1247, Invalid=3865, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:32:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-12 15:32:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4253. [2021-06-12 15:32:04,093 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 15:32:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11918 transitions. [2021-06-12 15:32:04,099 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11918 transitions. Word has length 145 [2021-06-12 15:32:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:04,099 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11918 transitions. [2021-06-12 15:32:04,100 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 15:32:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11918 transitions. [2021-06-12 15:32:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:04,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:04,103 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 15:32:04,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-12 15:32:04,328 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:04,328 INFO L82 PathProgramCache]: Analyzing trace with hash 169142907, now seen corresponding path program 263 times [2021-06-12 15:32:04,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:04,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445675101] [2021-06-12 15:32:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:04,588 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 15:32:04,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:04,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445675101] [2021-06-12 15:32:04,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445675101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:04,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319590965] [2021-06-12 15:32:04,589 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 15:32:04,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:32:04,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:04,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:04,833 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 15:32:04,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319590965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:04,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:04,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:32:04,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063089530] [2021-06-12 15:32:04,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:04,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:04,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:04,835 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 15:32:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:05,643 INFO L93 Difference]: Finished difference Result 5621 states and 14857 transitions. [2021-06-12 15:32:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:32:05,644 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 15:32:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:05,649 INFO L225 Difference]: With dead ends: 5621 [2021-06-12 15:32:05,649 INFO L226 Difference]: Without dead ends: 5351 [2021-06-12 15:32:05,649 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 834.1ms TimeCoverageRelationStatistics Valid=1325, Invalid=3787, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:32:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-12 15:32:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4328. [2021-06-12 15:32:05,689 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 15:32:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12143 transitions. [2021-06-12 15:32:05,693 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12143 transitions. Word has length 145 [2021-06-12 15:32:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:05,694 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12143 transitions. [2021-06-12 15:32:05,694 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 15:32:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12143 transitions. [2021-06-12 15:32:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:05,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:05,697 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 15:32:05,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:05,897 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:05,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:05,898 INFO L82 PathProgramCache]: Analyzing trace with hash -517040277, now seen corresponding path program 264 times [2021-06-12 15:32:05,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:05,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128388098] [2021-06-12 15:32:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:06,135 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 15:32:06,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:06,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128388098] [2021-06-12 15:32:06,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128388098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:06,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708125860] [2021-06-12 15:32:06,136 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 15:32:06,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:32:06,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:06,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:06,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:06,443 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 15:32:06,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708125860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:06,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:06,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:32:06,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506697021] [2021-06-12 15:32:06,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:06,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:06,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:06,445 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 15:32:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:07,422 INFO L93 Difference]: Finished difference Result 5646 states and 14982 transitions. [2021-06-12 15:32:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:32:07,422 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 15:32:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:07,428 INFO L225 Difference]: With dead ends: 5646 [2021-06-12 15:32:07,428 INFO L226 Difference]: Without dead ends: 5376 [2021-06-12 15:32:07,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 978.4ms TimeCoverageRelationStatistics Valid=1360, Invalid=4042, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:32:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-12 15:32:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4403. [2021-06-12 15:32:07,470 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 15:32:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12368 transitions. [2021-06-12 15:32:07,474 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12368 transitions. Word has length 145 [2021-06-12 15:32:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:07,475 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12368 transitions. [2021-06-12 15:32:07,475 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 15:32:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12368 transitions. [2021-06-12 15:32:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:07,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:07,478 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 15:32:07,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:07,678 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:07,679 INFO L82 PathProgramCache]: Analyzing trace with hash -602075015, now seen corresponding path program 265 times [2021-06-12 15:32:07,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:07,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672614044] [2021-06-12 15:32:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:07,950 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 15:32:07,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672614044] [2021-06-12 15:32:07,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672614044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884163782] [2021-06-12 15:32:07,950 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 15:32:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:08,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:08,248 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 15:32:08,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884163782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:08,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:08,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:32:08,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61750578] [2021-06-12 15:32:08,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:08,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:08,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:08,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:08,249 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 15:32:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:09,100 INFO L93 Difference]: Finished difference Result 5671 states and 15107 transitions. [2021-06-12 15:32:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:32:09,100 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 15:32:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:09,106 INFO L225 Difference]: With dead ends: 5671 [2021-06-12 15:32:09,106 INFO L226 Difference]: Without dead ends: 5401 [2021-06-12 15:32:09,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 869.9ms TimeCoverageRelationStatistics Valid=1452, Invalid=3950, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:32:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-12 15:32:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4478. [2021-06-12 15:32:09,150 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 15:32:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12593 transitions. [2021-06-12 15:32:09,155 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12593 transitions. Word has length 145 [2021-06-12 15:32:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:09,155 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12593 transitions. [2021-06-12 15:32:09,155 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 15:32:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12593 transitions. [2021-06-12 15:32:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:09,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:09,159 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 15:32:09,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:09,359 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:09,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:09,359 INFO L82 PathProgramCache]: Analyzing trace with hash -670226071, now seen corresponding path program 266 times [2021-06-12 15:32:09,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:09,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785077365] [2021-06-12 15:32:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:09,598 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 15:32:09,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:09,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785077365] [2021-06-12 15:32:09,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785077365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:09,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390399590] [2021-06-12 15:32:09,599 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 15:32:09,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:09,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:09,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:09,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:09,889 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 15:32:09,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390399590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:09,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:09,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:32:09,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557395636] [2021-06-12 15:32:09,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:09,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:09,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:09,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:09,890 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 15:32:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:10,919 INFO L93 Difference]: Finished difference Result 5696 states and 15232 transitions. [2021-06-12 15:32:10,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:32:10,919 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 15:32:10,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:10,924 INFO L225 Difference]: With dead ends: 5696 [2021-06-12 15:32:10,924 INFO L226 Difference]: Without dead ends: 5426 [2021-06-12 15:32:10,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1022.4ms TimeCoverageRelationStatistics Valid=1489, Invalid=4211, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:32:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-12 15:32:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4553. [2021-06-12 15:32:10,970 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 15:32:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12818 transitions. [2021-06-12 15:32:10,975 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12818 transitions. Word has length 145 [2021-06-12 15:32:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:10,975 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12818 transitions. [2021-06-12 15:32:10,976 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 15:32:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12818 transitions. [2021-06-12 15:32:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:10,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:10,979 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 15:32:11,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:11,180 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1967195145, now seen corresponding path program 267 times [2021-06-12 15:32:11,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:11,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285713081] [2021-06-12 15:32:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:11,412 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 15:32:11,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:11,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285713081] [2021-06-12 15:32:11,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285713081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:11,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608196646] [2021-06-12 15:32:11,413 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 15:32:11,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 15:32:11,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:11,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:11,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:11,686 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 15:32:11,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608196646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:11,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:11,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:32:11,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658079677] [2021-06-12 15:32:11,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:11,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:11,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:11,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:11,687 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 15:32:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:12,566 INFO L93 Difference]: Finished difference Result 5766 states and 15477 transitions. [2021-06-12 15:32:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:32:12,566 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 15:32:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:12,572 INFO L225 Difference]: With dead ends: 5766 [2021-06-12 15:32:12,572 INFO L226 Difference]: Without dead ends: 5496 [2021-06-12 15:32:12,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 873.4ms TimeCoverageRelationStatistics Valid=1595, Invalid=4105, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:32:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-06-12 15:32:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4628. [2021-06-12 15:32:12,613 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 15:32:12,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13058 transitions. [2021-06-12 15:32:12,619 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13058 transitions. Word has length 145 [2021-06-12 15:32:12,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:12,619 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13058 transitions. [2021-06-12 15:32:12,619 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 15:32:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13058 transitions. [2021-06-12 15:32:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:12,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:12,622 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 15:32:12,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:12,823 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:12,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1537441561, now seen corresponding path program 268 times [2021-06-12 15:32:12,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:12,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332318857] [2021-06-12 15:32:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:13,052 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 15:32:13,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:13,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332318857] [2021-06-12 15:32:13,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332318857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:13,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158938315] [2021-06-12 15:32:13,053 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 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 15:32:13,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:13,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:13,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:13,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:13,333 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 15:32:13,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158938315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:13,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:13,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:32:13,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099634336] [2021-06-12 15:32:13,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:13,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:13,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:13,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:13,334 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 15:32:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:14,469 INFO L93 Difference]: Finished difference Result 6344 states and 17103 transitions. [2021-06-12 15:32:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:32:14,469 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 15:32:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:14,474 INFO L225 Difference]: With dead ends: 6344 [2021-06-12 15:32:14,474 INFO L226 Difference]: Without dead ends: 5721 [2021-06-12 15:32:14,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 1093.7ms TimeCoverageRelationStatistics Valid=1657, Invalid=4663, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:32:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-12 15:32:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4703. [2021-06-12 15:32:14,512 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 15:32:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13288 transitions. [2021-06-12 15:32:14,517 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13288 transitions. Word has length 145 [2021-06-12 15:32:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:14,517 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13288 transitions. [2021-06-12 15:32:14,517 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 15:32:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13288 transitions. [2021-06-12 15:32:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:14,521 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:14,521 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 15:32:14,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:14,722 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1595175691, now seen corresponding path program 269 times [2021-06-12 15:32:14,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:14,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983626352] [2021-06-12 15:32:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:14,969 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 15:32:14,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:14,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983626352] [2021-06-12 15:32:14,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983626352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:14,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5444414] [2021-06-12 15:32:14,969 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 15:32:15,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 15:32:15,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:15,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:15,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:15,237 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 15:32:15,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5444414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:15,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:15,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-12 15:32:15,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51755023] [2021-06-12 15:32:15,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:15,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:15,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:15,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:15,241 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 15:32:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:16,158 INFO L93 Difference]: Finished difference Result 6548 states and 17771 transitions. [2021-06-12 15:32:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:32:16,158 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 15:32:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:16,164 INFO L225 Difference]: With dead ends: 6548 [2021-06-12 15:32:16,164 INFO L226 Difference]: Without dead ends: 6278 [2021-06-12 15:32:16,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 914.7ms TimeCoverageRelationStatistics Valid=1755, Invalid=4251, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:32:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2021-06-12 15:32:16,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 4883. [2021-06-12 15:32:16,208 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 15:32:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 13847 transitions. [2021-06-12 15:32:16,213 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 13847 transitions. Word has length 145 [2021-06-12 15:32:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:16,213 INFO L482 AbstractCegarLoop]: Abstraction has 4883 states and 13847 transitions. [2021-06-12 15:32:16,214 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 15:32:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 13847 transitions. [2021-06-12 15:32:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-12 15:32:16,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:16,217 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 15:32:16,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-12 15:32:16,417 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1572832441, now seen corresponding path program 270 times [2021-06-12 15:32:16,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:16,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758485418] [2021-06-12 15:32:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:16,672 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 15:32:16,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:16,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758485418] [2021-06-12 15:32:16,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758485418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:16,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285290071] [2021-06-12 15:32:16,672 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 15:32:16,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 15:32:16,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:16,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 15:32:16,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:16,963 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 15:32:16,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285290071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:16,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:16,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-12 15:32:16,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126932874] [2021-06-12 15:32:16,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:16,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:16,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:16,964 INFO L87 Difference]: Start difference. First operand 4883 states and 13847 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 15:32:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:18,122 INFO L93 Difference]: Finished difference Result 6416 states and 17436 transitions. [2021-06-12 15:32:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:32:18,123 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 145 [2021-06-12 15:32:18,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:18,128 INFO L225 Difference]: With dead ends: 6416 [2021-06-12 15:32:18,128 INFO L226 Difference]: Without dead ends: 5841 [2021-06-12 15:32:18,129 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 1166.9ms TimeCoverageRelationStatistics Valid=1844, Invalid=4962, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:32:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2021-06-12 15:32:18,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 3124. [2021-06-12 15:32:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 2.739673390970221) internal successors, (8556), 3123 states have internal predecessors, (8556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 8556 transitions. [2021-06-12 15:32:18,163 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 8556 transitions. Word has length 145 [2021-06-12 15:32:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:18,163 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 8556 transitions. [2021-06-12 15:32:18,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 15:32:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 8556 transitions. [2021-06-12 15:32:18,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:18,165 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:18,165 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 15:32:18,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-12 15:32:18,366 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:18,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1174739515, now seen corresponding path program 271 times [2021-06-12 15:32:18,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:18,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767031956] [2021-06-12 15:32:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:18,699 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 15:32:18,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:18,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767031956] [2021-06-12 15:32:18,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767031956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:18,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002433853] [2021-06-12 15:32:18,699 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 15:32:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:18,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:32:18,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:18,982 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 15:32:18,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002433853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:18,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:18,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2021-06-12 15:32:18,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011580118] [2021-06-12 15:32:18,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:32:18,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:18,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:32:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:32:18,984 INFO L87 Difference]: Start difference. First operand 3124 states and 8556 transitions. Second operand has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:19,602 INFO L93 Difference]: Finished difference Result 4364 states and 11356 transitions. [2021-06-12 15:32:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:32:19,603 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have 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 15:32:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:19,607 INFO L225 Difference]: With dead ends: 4364 [2021-06-12 15:32:19,607 INFO L226 Difference]: Without dead ends: 4030 [2021-06-12 15:32:19,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 764.8ms TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:32:19,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2021-06-12 15:32:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 3209. [2021-06-12 15:32:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 2.720074812967581) internal successors, (8726), 3208 states have internal predecessors, (8726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 8726 transitions. [2021-06-12 15:32:19,636 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 8726 transitions. Word has length 150 [2021-06-12 15:32:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:19,637 INFO L482 AbstractCegarLoop]: Abstraction has 3209 states and 8726 transitions. [2021-06-12 15:32:19,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 8726 transitions. [2021-06-12 15:32:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:19,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:19,639 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 15:32:19,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-12 15:32:19,839 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash 174102121, now seen corresponding path program 272 times [2021-06-12 15:32:19,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:19,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422243302] [2021-06-12 15:32:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:20,141 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 15:32:20,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:20,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422243302] [2021-06-12 15:32:20,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422243302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:20,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743138625] [2021-06-12 15:32:20,141 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 15:32:20,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:20,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:20,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:20,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:20,408 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 15:32:20,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743138625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:20,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:20,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:20,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289076460] [2021-06-12 15:32:20,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:20,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:20,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:20,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:20,409 INFO L87 Difference]: Start difference. First operand 3209 states and 8726 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:20,902 INFO L93 Difference]: Finished difference Result 5486 states and 13537 transitions. [2021-06-12 15:32:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:32:20,902 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:20,907 INFO L225 Difference]: With dead ends: 5486 [2021-06-12 15:32:20,907 INFO L226 Difference]: Without dead ends: 5216 [2021-06-12 15:32:20,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=854, Invalid=2226, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:32:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2021-06-12 15:32:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 3353. [2021-06-12 15:32:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7276252983293556) internal successors, (9143), 3352 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 15:32:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9143 transitions. [2021-06-12 15:32:20,940 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9143 transitions. Word has length 150 [2021-06-12 15:32:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:20,941 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9143 transitions. [2021-06-12 15:32:20,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9143 transitions. [2021-06-12 15:32:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:20,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:20,943 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 15:32:21,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-06-12 15:32:21,143 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:21,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1057153881, now seen corresponding path program 273 times [2021-06-12 15:32:21,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:21,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76196942] [2021-06-12 15:32:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:21,463 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 15:32:21,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:21,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76196942] [2021-06-12 15:32:21,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76196942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:21,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61637766] [2021-06-12 15:32:21,463 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 15:32:21,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:32:21,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:21,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:21,739 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 15:32:21,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61637766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:21,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:21,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:21,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587134355] [2021-06-12 15:32:21,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:21,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:21,740 INFO L87 Difference]: Start difference. First operand 3353 states and 9143 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 15:32:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:22,334 INFO L93 Difference]: Finished difference Result 5446 states and 13532 transitions. [2021-06-12 15:32:22,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:32:22,335 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 15:32:22,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:22,339 INFO L225 Difference]: With dead ends: 5446 [2021-06-12 15:32:22,339 INFO L226 Difference]: Without dead ends: 5176 [2021-06-12 15:32:22,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 727.6ms TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:32:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-12 15:32:22,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3428. [2021-06-12 15:32:22,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7335862270207176) internal successors, (9368), 3427 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 15:32:22,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9368 transitions. [2021-06-12 15:32:22,373 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9368 transitions. Word has length 150 [2021-06-12 15:32:22,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:22,373 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9368 transitions. [2021-06-12 15:32:22,373 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 15:32:22,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9368 transitions. [2021-06-12 15:32:22,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:22,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:22,375 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 15:32:22,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:22,576 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:22,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:22,576 INFO L82 PathProgramCache]: Analyzing trace with hash -835055513, now seen corresponding path program 274 times [2021-06-12 15:32:22,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:22,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455797242] [2021-06-12 15:32:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:22,869 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 15:32:22,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:22,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455797242] [2021-06-12 15:32:22,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455797242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:22,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684384288] [2021-06-12 15:32:22,869 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 15:32:22,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:22,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:22,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:23,121 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 15:32:23,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684384288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:23,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:23,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:23,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779492368] [2021-06-12 15:32:23,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:23,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:23,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:23,122 INFO L87 Difference]: Start difference. First operand 3428 states and 9368 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:23,682 INFO L93 Difference]: Finished difference Result 5496 states and 13707 transitions. [2021-06-12 15:32:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:32:23,682 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:23,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:23,686 INFO L225 Difference]: With dead ends: 5496 [2021-06-12 15:32:23,686 INFO L226 Difference]: Without dead ends: 5226 [2021-06-12 15:32:23,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=855, Invalid=2451, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:32:23,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-12 15:32:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3503. [2021-06-12 15:32:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7392918332381497) internal successors, (9593), 3502 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 15:32:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9593 transitions. [2021-06-12 15:32:23,719 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9593 transitions. Word has length 150 [2021-06-12 15:32:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:23,719 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9593 transitions. [2021-06-12 15:32:23,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9593 transitions. [2021-06-12 15:32:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:23,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:23,722 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 15:32:23,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-12 15:32:23,922 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:23,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1006291287, now seen corresponding path program 275 times [2021-06-12 15:32:23,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:23,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898422702] [2021-06-12 15:32:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:24,231 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 15:32:24,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:24,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898422702] [2021-06-12 15:32:24,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898422702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:24,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511737006] [2021-06-12 15:32:24,232 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 15:32:24,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:32:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:24,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:24,500 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 15:32:24,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511737006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:24,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:24,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:24,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006399239] [2021-06-12 15:32:24,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:24,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:24,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:24,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:24,501 INFO L87 Difference]: Start difference. First operand 3503 states and 9593 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 15:32:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:25,206 INFO L93 Difference]: Finished difference Result 5521 states and 13832 transitions. [2021-06-12 15:32:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:32:25,207 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 15:32:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:25,211 INFO L225 Difference]: With dead ends: 5521 [2021-06-12 15:32:25,211 INFO L226 Difference]: Without dead ends: 5251 [2021-06-12 15:32:25,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=938, Invalid=2844, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:32:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-12 15:32:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 3578. [2021-06-12 15:32:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.7447581772435004) internal successors, (9818), 3577 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 15:32:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9818 transitions. [2021-06-12 15:32:25,246 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9818 transitions. Word has length 150 [2021-06-12 15:32:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:25,246 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9818 transitions. [2021-06-12 15:32:25,247 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 15:32:25,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9818 transitions. [2021-06-12 15:32:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:25,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:25,249 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 15:32:25,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:25,450 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:25,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1887850469, now seen corresponding path program 276 times [2021-06-12 15:32:25,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:25,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645395717] [2021-06-12 15:32:25,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:25,752 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 15:32:25,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:25,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645395717] [2021-06-12 15:32:25,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645395717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:25,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869799305] [2021-06-12 15:32:25,752 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 15:32:25,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:32:25,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:25,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:26,013 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 15:32:26,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869799305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:26,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:26,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:26,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744366306] [2021-06-12 15:32:26,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:26,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:26,014 INFO L87 Difference]: Start difference. First operand 3578 states and 9818 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:26,609 INFO L93 Difference]: Finished difference Result 5546 states and 13957 transitions. [2021-06-12 15:32:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:32:26,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:26,615 INFO L225 Difference]: With dead ends: 5546 [2021-06-12 15:32:26,615 INFO L226 Difference]: Without dead ends: 5276 [2021-06-12 15:32:26,615 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 677.3ms TimeCoverageRelationStatistics Valid=872, Invalid=2668, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:32:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-12 15:32:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 3653. [2021-06-12 15:32:26,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.75) internal successors, (10043), 3652 states have internal predecessors, (10043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10043 transitions. [2021-06-12 15:32:26,651 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10043 transitions. Word has length 150 [2021-06-12 15:32:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:26,651 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10043 transitions. [2021-06-12 15:32:26,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10043 transitions. [2021-06-12 15:32:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:26,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:26,654 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 15:32:26,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:26,855 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1245476053, now seen corresponding path program 277 times [2021-06-12 15:32:26,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:26,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139832455] [2021-06-12 15:32:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:27,153 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 15:32:27,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:27,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139832455] [2021-06-12 15:32:27,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139832455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:27,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956196545] [2021-06-12 15:32:27,153 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 15:32:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:27,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:27,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:27,436 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 15:32:27,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956196545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:27,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:27,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:27,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520595644] [2021-06-12 15:32:27,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:27,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:27,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:27,437 INFO L87 Difference]: Start difference. First operand 3653 states and 10043 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 15:32:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:28,151 INFO L93 Difference]: Finished difference Result 5571 states and 14082 transitions. [2021-06-12 15:32:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:32:28,151 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 15:32:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:28,157 INFO L225 Difference]: With dead ends: 5571 [2021-06-12 15:32:28,157 INFO L226 Difference]: Without dead ends: 5301 [2021-06-12 15:32:28,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 794.4ms TimeCoverageRelationStatistics Valid=963, Invalid=3069, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:32:28,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-12 15:32:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 3728. [2021-06-12 15:32:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.7550308559162864) internal successors, (10268), 3727 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10268 transitions. [2021-06-12 15:32:28,196 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10268 transitions. Word has length 150 [2021-06-12 15:32:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:28,196 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10268 transitions. [2021-06-12 15:32:28,196 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 15:32:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10268 transitions. [2021-06-12 15:32:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:28,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:28,199 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 15:32:28,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:28,400 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1198929123, now seen corresponding path program 278 times [2021-06-12 15:32:28,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:28,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961395359] [2021-06-12 15:32:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:28,674 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 15:32:28,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:28,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961395359] [2021-06-12 15:32:28,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961395359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:28,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778093804] [2021-06-12 15:32:28,675 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 15:32:28,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:28,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:28,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:28,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:28,943 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 15:32:28,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778093804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:28,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:28,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:28,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253075105] [2021-06-12 15:32:28,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:28,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:28,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:28,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:28,944 INFO L87 Difference]: Start difference. First operand 3728 states and 10268 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:29,578 INFO L93 Difference]: Finished difference Result 5596 states and 14207 transitions. [2021-06-12 15:32:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:32:29,579 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:29,584 INFO L225 Difference]: With dead ends: 5596 [2021-06-12 15:32:29,584 INFO L226 Difference]: Without dead ends: 5326 [2021-06-12 15:32:29,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 706.0ms TimeCoverageRelationStatistics Valid=905, Invalid=2877, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:32:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-12 15:32:29,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 3803. [2021-06-12 15:32:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.759863229879011) internal successors, (10493), 3802 states have internal predecessors, (10493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10493 transitions. [2021-06-12 15:32:29,623 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10493 transitions. Word has length 150 [2021-06-12 15:32:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:29,623 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10493 transitions. [2021-06-12 15:32:29,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:29,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10493 transitions. [2021-06-12 15:32:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:29,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:29,626 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 15:32:29,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:29,826 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:29,827 INFO L82 PathProgramCache]: Analyzing trace with hash 280544723, now seen corresponding path program 279 times [2021-06-12 15:32:29,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:29,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781913110] [2021-06-12 15:32:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:30,112 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 15:32:30,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:30,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781913110] [2021-06-12 15:32:30,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781913110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:30,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015793757] [2021-06-12 15:32:30,113 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 15:32:30,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:32:30,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:30,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:30,389 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 15:32:30,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015793757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:30,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:30,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:30,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795388865] [2021-06-12 15:32:30,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:30,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:30,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:30,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:30,390 INFO L87 Difference]: Start difference. First operand 3803 states and 10493 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 15:32:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:31,169 INFO L93 Difference]: Finished difference Result 5621 states and 14332 transitions. [2021-06-12 15:32:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:32:31,170 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 15:32:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:31,175 INFO L225 Difference]: With dead ends: 5621 [2021-06-12 15:32:31,175 INFO L226 Difference]: Without dead ends: 5351 [2021-06-12 15:32:31,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 854.3ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:32:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-12 15:32:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 3878. [2021-06-12 15:32:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7645086407015733) internal successors, (10718), 3877 states have internal predecessors, (10718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10718 transitions. [2021-06-12 15:32:31,219 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10718 transitions. Word has length 150 [2021-06-12 15:32:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:31,219 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10718 transitions. [2021-06-12 15:32:31,219 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 15:32:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10718 transitions. [2021-06-12 15:32:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:31,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:31,222 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 15:32:31,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-12 15:32:31,423 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:31,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1496146079, now seen corresponding path program 280 times [2021-06-12 15:32:31,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:31,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814661675] [2021-06-12 15:32:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:31,692 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 15:32:31,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:31,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814661675] [2021-06-12 15:32:31,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814661675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:31,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096368552] [2021-06-12 15:32:31,693 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 15:32:31,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:31,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:31,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:31,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:31,944 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 15:32:31,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096368552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:31,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:31,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:31,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126772656] [2021-06-12 15:32:31,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:31,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:31,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:31,945 INFO L87 Difference]: Start difference. First operand 3878 states and 10718 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:32,696 INFO L93 Difference]: Finished difference Result 5646 states and 14457 transitions. [2021-06-12 15:32:32,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:32:32,696 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:32,700 INFO L225 Difference]: With dead ends: 5646 [2021-06-12 15:32:32,701 INFO L226 Difference]: Without dead ends: 5376 [2021-06-12 15:32:32,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=954, Invalid=3078, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:32:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-12 15:32:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 3953. [2021-06-12 15:32:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7689777327935223) internal successors, (10943), 3952 states have internal predecessors, (10943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10943 transitions. [2021-06-12 15:32:32,739 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10943 transitions. Word has length 150 [2021-06-12 15:32:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:32,739 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 10943 transitions. [2021-06-12 15:32:32,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10943 transitions. [2021-06-12 15:32:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:32,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:32,742 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 15:32:32,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-12 15:32:32,942 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash 603495505, now seen corresponding path program 281 times [2021-06-12 15:32:32,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:32,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613398736] [2021-06-12 15:32:32,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:33,216 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 15:32:33,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:33,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613398736] [2021-06-12 15:32:33,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613398736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:33,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471368584] [2021-06-12 15:32:33,216 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 15:32:33,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:32:33,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:33,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:33,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:33,482 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 15:32:33,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471368584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:33,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:33,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:33,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079691205] [2021-06-12 15:32:33,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:33,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:33,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:33,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:33,483 INFO L87 Difference]: Start difference. First operand 3953 states and 10943 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 15:32:34,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:34,349 INFO L93 Difference]: Finished difference Result 5671 states and 14582 transitions. [2021-06-12 15:32:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:32:34,350 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 15:32:34,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:34,354 INFO L225 Difference]: With dead ends: 5671 [2021-06-12 15:32:34,354 INFO L226 Difference]: Without dead ends: 5401 [2021-06-12 15:32:34,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 893.5ms TimeCoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:32:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-12 15:32:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4028. [2021-06-12 15:32:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 2.7732803575862923) internal successors, (11168), 4027 states have internal predecessors, (11168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11168 transitions. [2021-06-12 15:32:34,394 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11168 transitions. Word has length 150 [2021-06-12 15:32:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:34,394 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11168 transitions. [2021-06-12 15:32:34,394 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 15:32:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11168 transitions. [2021-06-12 15:32:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:34,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:34,397 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 15:32:34,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-12 15:32:34,598 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:34,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:34,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2113695583, now seen corresponding path program 282 times [2021-06-12 15:32:34,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:34,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036595398] [2021-06-12 15:32:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:34,869 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 15:32:34,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:34,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036595398] [2021-06-12 15:32:34,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036595398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:34,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137115117] [2021-06-12 15:32:34,869 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 15:32:34,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:32:34,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:34,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:35,124 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 15:32:35,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137115117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:35,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:35,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:35,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375913463] [2021-06-12 15:32:35,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:35,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:35,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:35,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:35,125 INFO L87 Difference]: Start difference. First operand 4028 states and 11168 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:35,925 INFO L93 Difference]: Finished difference Result 5696 states and 14707 transitions. [2021-06-12 15:32:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:32:35,925 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:35,929 INFO L225 Difference]: With dead ends: 5696 [2021-06-12 15:32:35,929 INFO L226 Difference]: Without dead ends: 5426 [2021-06-12 15:32:35,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 784.8ms TimeCoverageRelationStatistics Valid=1019, Invalid=3271, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:32:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-12 15:32:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4103. [2021-06-12 15:32:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4103 states, 4102 states have (on average 2.7774256460263285) internal successors, (11393), 4102 states have internal predecessors, (11393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11393 transitions. [2021-06-12 15:32:35,972 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11393 transitions. Word has length 150 [2021-06-12 15:32:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:35,972 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11393 transitions. [2021-06-12 15:32:35,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11393 transitions. [2021-06-12 15:32:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:35,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:35,975 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 15:32:36,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:36,176 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:36,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:36,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1541613489, now seen corresponding path program 283 times [2021-06-12 15:32:36,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:36,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660689965] [2021-06-12 15:32:36,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:36,447 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 15:32:36,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:36,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660689965] [2021-06-12 15:32:36,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660689965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:36,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016423649] [2021-06-12 15:32:36,448 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 15:32:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:36,710 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 15:32:36,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016423649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:36,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:36,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:36,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583566906] [2021-06-12 15:32:36,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:36,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:36,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:36,711 INFO L87 Difference]: Start difference. First operand 4103 states and 11393 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 15:32:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:37,699 INFO L93 Difference]: Finished difference Result 5721 states and 14832 transitions. [2021-06-12 15:32:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:32:37,700 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 15:32:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:37,704 INFO L225 Difference]: With dead ends: 5721 [2021-06-12 15:32:37,704 INFO L226 Difference]: Without dead ends: 5451 [2021-06-12 15:32:37,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 953.8ms TimeCoverageRelationStatistics Valid=1134, Invalid=3696, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:32:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-12 15:32:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4178. [2021-06-12 15:32:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.7814220732583195) internal successors, (11618), 4177 states have internal predecessors, (11618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11618 transitions. [2021-06-12 15:32:37,747 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11618 transitions. Word has length 150 [2021-06-12 15:32:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:37,748 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11618 transitions. [2021-06-12 15:32:37,748 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 15:32:37,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11618 transitions. [2021-06-12 15:32:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:37,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:37,751 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 15:32:37,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:37,951 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:37,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1978434781, now seen corresponding path program 284 times [2021-06-12 15:32:37,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:37,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117735279] [2021-06-12 15:32:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:38,242 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 15:32:38,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:38,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117735279] [2021-06-12 15:32:38,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117735279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:38,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001416497] [2021-06-12 15:32:38,242 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 15:32:38,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:38,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:38,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:38,488 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 15:32:38,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001416497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:38,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:38,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:38,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094475769] [2021-06-12 15:32:38,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:38,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:38,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:38,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:38,489 INFO L87 Difference]: Start difference. First operand 4178 states and 11618 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:39,275 INFO L93 Difference]: Finished difference Result 5746 states and 14957 transitions. [2021-06-12 15:32:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:32:39,276 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:39,281 INFO L225 Difference]: With dead ends: 5746 [2021-06-12 15:32:39,281 INFO L226 Difference]: Without dead ends: 5476 [2021-06-12 15:32:39,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 828.8ms TimeCoverageRelationStatistics Valid=1100, Invalid=3456, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:32:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-12 15:32:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 4253. [2021-06-12 15:32:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4253 states, 4252 states have (on average 2.785277516462841) internal successors, (11843), 4252 states have internal predecessors, (11843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11843 transitions. [2021-06-12 15:32:39,344 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11843 transitions. Word has length 150 [2021-06-12 15:32:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:39,344 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11843 transitions. [2021-06-12 15:32:39,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11843 transitions. [2021-06-12 15:32:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:39,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:39,347 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 15:32:39,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:39,548 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:39,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1524521421, now seen corresponding path program 285 times [2021-06-12 15:32:39,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:39,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928844270] [2021-06-12 15:32:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:39,821 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 15:32:39,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:39,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928844270] [2021-06-12 15:32:39,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928844270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:39,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810026459] [2021-06-12 15:32:39,821 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 15:32:39,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:32:39,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:39,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:39,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:40,092 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 15:32:40,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810026459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:40,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:40,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:40,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842243783] [2021-06-12 15:32:40,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:40,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:40,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:40,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:40,094 INFO L87 Difference]: Start difference. First operand 4253 states and 11843 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 15:32:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:41,067 INFO L93 Difference]: Finished difference Result 5771 states and 15082 transitions. [2021-06-12 15:32:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:32:41,068 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 15:32:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:41,073 INFO L225 Difference]: With dead ends: 5771 [2021-06-12 15:32:41,073 INFO L226 Difference]: Without dead ends: 5501 [2021-06-12 15:32:41,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 975.5ms TimeCoverageRelationStatistics Valid=1223, Invalid=3889, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:32:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-12 15:32:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4328. [2021-06-12 15:32:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 4327 states have (on average 2.7889993066789924) internal successors, (12068), 4327 states have internal predecessors, (12068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12068 transitions. [2021-06-12 15:32:41,138 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12068 transitions. Word has length 150 [2021-06-12 15:32:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:41,138 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12068 transitions. [2021-06-12 15:32:41,138 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 15:32:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12068 transitions. [2021-06-12 15:32:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:41,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:41,141 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 15:32:41,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:41,342 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:41,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1892433957, now seen corresponding path program 286 times [2021-06-12 15:32:41,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:41,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148866994] [2021-06-12 15:32:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:41,593 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 15:32:41,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:41,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148866994] [2021-06-12 15:32:41,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148866994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:41,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914989276] [2021-06-12 15:32:41,593 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 15:32:41,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:41,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:41,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:41,836 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 15:32:41,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914989276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:41,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:41,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:41,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734403549] [2021-06-12 15:32:41,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:41,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:41,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:41,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:41,837 INFO L87 Difference]: Start difference. First operand 4328 states and 12068 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:42,641 INFO L93 Difference]: Finished difference Result 5796 states and 15207 transitions. [2021-06-12 15:32:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:32:42,641 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:42,647 INFO L225 Difference]: With dead ends: 5796 [2021-06-12 15:32:42,647 INFO L226 Difference]: Without dead ends: 5526 [2021-06-12 15:32:42,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 825.5ms TimeCoverageRelationStatistics Valid=1197, Invalid=3633, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:32:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-06-12 15:32:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4403. [2021-06-12 15:32:42,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 4402 states have (on average 2.7925942753293955) internal successors, (12293), 4402 states have internal predecessors, (12293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12293 transitions. [2021-06-12 15:32:42,694 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12293 transitions. Word has length 150 [2021-06-12 15:32:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:42,694 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12293 transitions. [2021-06-12 15:32:42,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12293 transitions. [2021-06-12 15:32:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:42,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:42,697 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 15:32:42,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:42,898 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:42,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:42,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1502478539, now seen corresponding path program 287 times [2021-06-12 15:32:42,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:42,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379860777] [2021-06-12 15:32:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:43,178 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 15:32:43,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:43,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379860777] [2021-06-12 15:32:43,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379860777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:43,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848072493] [2021-06-12 15:32:43,178 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 15:32:43,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:32:43,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:43,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:43,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:43,438 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 15:32:43,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848072493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:43,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:43,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:43,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536823402] [2021-06-12 15:32:43,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:43,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:43,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:43,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:43,439 INFO L87 Difference]: Start difference. First operand 4403 states and 12293 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 15:32:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:44,444 INFO L93 Difference]: Finished difference Result 5821 states and 15332 transitions. [2021-06-12 15:32:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:32:44,444 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 15:32:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:44,449 INFO L225 Difference]: With dead ends: 5821 [2021-06-12 15:32:44,450 INFO L226 Difference]: Without dead ends: 5551 [2021-06-12 15:32:44,450 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 1014.8ms TimeCoverageRelationStatistics Valid=1328, Invalid=4074, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:32:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-12 15:32:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4478. [2021-06-12 15:32:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.796068796068796) internal successors, (12518), 4477 states have internal predecessors, (12518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12518 transitions. [2021-06-12 15:32:44,521 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12518 transitions. Word has length 150 [2021-06-12 15:32:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:44,522 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12518 transitions. [2021-06-12 15:32:44,522 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 15:32:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12518 transitions. [2021-06-12 15:32:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:44,525 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:44,525 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 15:32:44,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:44,725 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:44,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:44,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1073414233, now seen corresponding path program 288 times [2021-06-12 15:32:44,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:44,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007090592] [2021-06-12 15:32:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:44,972 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 15:32:44,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:44,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007090592] [2021-06-12 15:32:44,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007090592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:44,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776124851] [2021-06-12 15:32:44,972 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 15:32:45,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:32:45,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:45,225 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 15:32:45,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776124851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:45,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:45,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:45,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410207386] [2021-06-12 15:32:45,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:45,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:45,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:45,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:45,226 INFO L87 Difference]: Start difference. First operand 4478 states and 12518 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:46,083 INFO L93 Difference]: Finished difference Result 5846 states and 15457 transitions. [2021-06-12 15:32:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:32:46,083 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:46,089 INFO L225 Difference]: With dead ends: 5846 [2021-06-12 15:32:46,089 INFO L226 Difference]: Without dead ends: 5576 [2021-06-12 15:32:46,089 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:32:46,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-06-12 15:32:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4553. [2021-06-12 15:32:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 2.7994288224956065) internal successors, (12743), 4552 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12743 transitions. [2021-06-12 15:32:46,137 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12743 transitions. Word has length 150 [2021-06-12 15:32:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:46,137 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12743 transitions. [2021-06-12 15:32:46,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:46,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12743 transitions. [2021-06-12 15:32:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:46,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:46,141 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 15:32:46,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:46,341 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash 387231049, now seen corresponding path program 289 times [2021-06-12 15:32:46,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:46,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418191100] [2021-06-12 15:32:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:46,612 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 15:32:46,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:46,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418191100] [2021-06-12 15:32:46,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418191100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:46,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868841366] [2021-06-12 15:32:46,613 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 15:32:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:46,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:46,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:46,867 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 15:32:46,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868841366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:46,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:46,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:46,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007746523] [2021-06-12 15:32:46,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:46,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:46,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:46,868 INFO L87 Difference]: Start difference. First operand 4553 states and 12743 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 15:32:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:47,938 INFO L93 Difference]: Finished difference Result 5871 states and 15582 transitions. [2021-06-12 15:32:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:32:47,938 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 15:32:47,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:47,944 INFO L225 Difference]: With dead ends: 5871 [2021-06-12 15:32:47,944 INFO L226 Difference]: Without dead ends: 5601 [2021-06-12 15:32:47,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1063.2ms TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:32:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-12 15:32:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4628. [2021-06-12 15:32:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.802679922195807) internal successors, (12968), 4627 states have internal predecessors, (12968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 12968 transitions. [2021-06-12 15:32:48,010 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 12968 transitions. Word has length 150 [2021-06-12 15:32:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:48,010 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 12968 transitions. [2021-06-12 15:32:48,010 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 15:32:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 12968 transitions. [2021-06-12 15:32:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:48,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:48,013 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 15:32:48,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:48,214 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash 302196311, now seen corresponding path program 290 times [2021-06-12 15:32:48,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:48,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776029110] [2021-06-12 15:32:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:48,508 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 15:32:48,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:48,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776029110] [2021-06-12 15:32:48,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776029110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:48,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120742777] [2021-06-12 15:32:48,509 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 15:32:48,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:32:48,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:48,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:48,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:48,799 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 15:32:48,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120742777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:48,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:48,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:48,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319376024] [2021-06-12 15:32:48,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:48,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:48,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:48,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:48,800 INFO L87 Difference]: Start difference. First operand 4628 states and 12968 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:49,848 INFO L93 Difference]: Finished difference Result 5896 states and 15707 transitions. [2021-06-12 15:32:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:32:49,849 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:49,855 INFO L225 Difference]: With dead ends: 5896 [2021-06-12 15:32:49,856 INFO L226 Difference]: Without dead ends: 5626 [2021-06-12 15:32:49,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 1045.6ms TimeCoverageRelationStatistics Valid=1439, Invalid=3963, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:32:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-12 15:32:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4703. [2021-06-12 15:32:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 2.8058273075287112) internal successors, (13193), 4702 states have internal predecessors, (13193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13193 transitions. [2021-06-12 15:32:49,979 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13193 transitions. Word has length 150 [2021-06-12 15:32:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:49,979 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13193 transitions. [2021-06-12 15:32:49,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13193 transitions. [2021-06-12 15:32:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:49,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:49,983 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 15:32:50,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-12 15:32:50,205 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 234045255, now seen corresponding path program 291 times [2021-06-12 15:32:50,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:50,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856281945] [2021-06-12 15:32:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:50,509 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 15:32:50,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:50,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856281945] [2021-06-12 15:32:50,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856281945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:50,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598756663] [2021-06-12 15:32:50,509 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 15:32:50,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:32:50,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:50,829 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 15:32:50,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598756663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:50,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:50,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:50,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605384167] [2021-06-12 15:32:50,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:50,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:50,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:50,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:50,830 INFO L87 Difference]: Start difference. First operand 4703 states and 13193 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 15:32:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:52,271 INFO L93 Difference]: Finished difference Result 5921 states and 15832 transitions. [2021-06-12 15:32:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:32:52,271 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 15:32:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:52,277 INFO L225 Difference]: With dead ends: 5921 [2021-06-12 15:32:52,277 INFO L226 Difference]: Without dead ends: 5651 [2021-06-12 15:32:52,297 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1411.9ms TimeCoverageRelationStatistics Valid=1586, Invalid=4420, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:32:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-12 15:32:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4778. [2021-06-12 15:32:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4778 states, 4777 states have (on average 2.808875863512665) internal successors, (13418), 4777 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4778 states to 4778 states and 13418 transitions. [2021-06-12 15:32:52,366 INFO L78 Accepts]: Start accepts. Automaton has 4778 states and 13418 transitions. Word has length 150 [2021-06-12 15:32:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:52,366 INFO L482 AbstractCegarLoop]: Abstraction has 4778 states and 13418 transitions. [2021-06-12 15:32:52,367 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 15:32:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4778 states and 13418 transitions. [2021-06-12 15:32:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:52,371 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:52,371 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 15:32:52,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:32:52,587 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:52,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:52,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1062923819, now seen corresponding path program 292 times [2021-06-12 15:32:52,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:52,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2407831] [2021-06-12 15:32:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:53,023 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 15:32:53,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:53,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2407831] [2021-06-12 15:32:53,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2407831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:53,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36436051] [2021-06-12 15:32:53,024 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 15:32:53,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:32:53,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:53,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:53,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:53,399 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 15:32:53,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36436051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:53,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:53,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:53,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7418804] [2021-06-12 15:32:53,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:53,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:53,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:53,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:53,400 INFO L87 Difference]: Start difference. First operand 4778 states and 13418 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:54,499 INFO L93 Difference]: Finished difference Result 5991 states and 16077 transitions. [2021-06-12 15:32:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:32:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:54,546 INFO L225 Difference]: With dead ends: 5991 [2021-06-12 15:32:54,546 INFO L226 Difference]: Without dead ends: 5721 [2021-06-12 15:32:54,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1178.9ms TimeCoverageRelationStatistics Valid=1584, Invalid=4116, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:32:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-12 15:32:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4853. [2021-06-12 15:32:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4853 states, 4852 states have (on average 2.814921681780709) internal successors, (13658), 4852 states have internal predecessors, (13658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:54,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4853 states to 4853 states and 13658 transitions. [2021-06-12 15:32:54,613 INFO L78 Accepts]: Start accepts. Automaton has 4853 states and 13658 transitions. Word has length 150 [2021-06-12 15:32:54,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:54,613 INFO L482 AbstractCegarLoop]: Abstraction has 4853 states and 13658 transitions. [2021-06-12 15:32:54,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4853 states and 13658 transitions. [2021-06-12 15:32:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:54,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:54,618 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 15:32:54,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-12 15:32:54,833 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash -633170235, now seen corresponding path program 293 times [2021-06-12 15:32:54,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:54,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531727316] [2021-06-12 15:32:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:55,130 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 15:32:55,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:55,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531727316] [2021-06-12 15:32:55,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531727316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:55,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377893091] [2021-06-12 15:32:55,130 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 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 15:32:55,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:32:55,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:55,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:55,434 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 15:32:55,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377893091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:55,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:55,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-12 15:32:55,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935703904] [2021-06-12 15:32:55,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:32:55,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:55,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:32:55,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:32:55,436 INFO L87 Difference]: Start difference. First operand 4853 states and 13658 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 15:32:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:56,889 INFO L93 Difference]: Finished difference Result 6569 states and 17703 transitions. [2021-06-12 15:32:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:32:56,889 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 15:32:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:56,894 INFO L225 Difference]: With dead ends: 6569 [2021-06-12 15:32:56,894 INFO L226 Difference]: Without dead ends: 5946 [2021-06-12 15:32:56,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1419.6ms TimeCoverageRelationStatistics Valid=1760, Invalid=4882, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:32:56,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5946 states. [2021-06-12 15:32:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5946 to 4928. [2021-06-12 15:32:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.8187538055611934) internal successors, (13888), 4927 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13888 transitions. [2021-06-12 15:32:56,938 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13888 transitions. Word has length 150 [2021-06-12 15:32:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:56,938 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13888 transitions. [2021-06-12 15:32:56,938 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 15:32:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13888 transitions. [2021-06-12 15:32:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:56,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:56,942 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 15:32:57,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-12 15:32:57,143 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:57,143 INFO L82 PathProgramCache]: Analyzing trace with hash -690904365, now seen corresponding path program 294 times [2021-06-12 15:32:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:57,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791484144] [2021-06-12 15:32:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:57,392 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 15:32:57,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:57,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791484144] [2021-06-12 15:32:57,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791484144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:57,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930562802] [2021-06-12 15:32:57,393 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 15:32:57,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:32:57,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:32:57,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:57,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:57,638 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 15:32:57,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930562802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:57,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:57,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 15:32:57,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792023603] [2021-06-12 15:32:57,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 15:32:57,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:57,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 15:32:57,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:32:57,639 INFO L87 Difference]: Start difference. First operand 4928 states and 13888 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:32:58,648 INFO L93 Difference]: Finished difference Result 6798 states and 18421 transitions. [2021-06-12 15:32:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:32:58,648 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have 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 15:32:58,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:32:58,654 INFO L225 Difference]: With dead ends: 6798 [2021-06-12 15:32:58,654 INFO L226 Difference]: Without dead ends: 6528 [2021-06-12 15:32:58,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 992.3ms TimeCoverageRelationStatistics Valid=1746, Invalid=4260, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:32:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-06-12 15:32:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 5108. [2021-06-12 15:32:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 5107 states have (on average 2.8288623457998825) internal successors, (14447), 5107 states have internal predecessors, (14447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 14447 transitions. [2021-06-12 15:32:58,710 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 14447 transitions. Word has length 150 [2021-06-12 15:32:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:32:58,710 INFO L482 AbstractCegarLoop]: Abstraction has 5108 states and 14447 transitions. [2021-06-12 15:32:58,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:32:58,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 14447 transitions. [2021-06-12 15:32:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-12 15:32:58,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:32:58,714 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 15:32:58,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-12 15:32:58,914 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:32:58,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:32:58,914 INFO L82 PathProgramCache]: Analyzing trace with hash -668561115, now seen corresponding path program 295 times [2021-06-12 15:32:58,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:32:58,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468779359] [2021-06-12 15:32:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:32:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:59,163 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 15:32:59,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:32:59,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468779359] [2021-06-12 15:32:59,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468779359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:59,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165663899] [2021-06-12 15:32:59,164 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 15:32:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:32:59,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 15:32:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:32:59,428 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 15:32:59,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165663899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:32:59,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:32:59,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-12 15:32:59,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991946122] [2021-06-12 15:32:59,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:32:59,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:32:59,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:32:59,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:32:59,429 INFO L87 Difference]: Start difference. First operand 5108 states and 14447 transitions. Second operand has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:00,732 INFO L93 Difference]: Finished difference Result 6621 states and 17921 transitions. [2021-06-12 15:33:00,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:33:00,732 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have 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 15:33:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:00,737 INFO L225 Difference]: With dead ends: 6621 [2021-06-12 15:33:00,737 INFO L226 Difference]: Without dead ends: 6046 [2021-06-12 15:33:00,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 1267.5ms TimeCoverageRelationStatistics Valid=1989, Invalid=5321, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 15:33:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6046 states. [2021-06-12 15:33:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6046 to 3403. [2021-06-12 15:33:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 3402 states have (on average 2.7389770723104054) internal successors, (9318), 3402 states have internal predecessors, (9318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 9318 transitions. [2021-06-12 15:33:00,773 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 9318 transitions. Word has length 150 [2021-06-12 15:33:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:00,773 INFO L482 AbstractCegarLoop]: Abstraction has 3403 states and 9318 transitions. [2021-06-12 15:33:00,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 9318 transitions. [2021-06-12 15:33:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:00,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:00,775 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 15:33:00,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:00,976 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:00,976 INFO L82 PathProgramCache]: Analyzing trace with hash 771249274, now seen corresponding path program 296 times [2021-06-12 15:33:00,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:00,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844225317] [2021-06-12 15:33:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:01,292 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 15:33:01,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:01,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844225317] [2021-06-12 15:33:01,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844225317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:01,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373753490] [2021-06-12 15:33:01,292 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 15:33:01,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:01,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:01,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:01,549 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 15:33:01,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373753490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:01,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:01,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:01,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263565175] [2021-06-12 15:33:01,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:01,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:01,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:01,550 INFO L87 Difference]: Start difference. First operand 3403 states and 9318 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 15:33:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:02,124 INFO L93 Difference]: Finished difference Result 5021 states and 12757 transitions. [2021-06-12 15:33:02,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:33:02,125 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 15:33:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:02,128 INFO L225 Difference]: With dead ends: 5021 [2021-06-12 15:33:02,128 INFO L226 Difference]: Without dead ends: 4751 [2021-06-12 15:33:02,129 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=935, Invalid=2605, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:33:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-06-12 15:33:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3478. [2021-06-12 15:33:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 2.7446074201898187) internal successors, (9543), 3477 states have internal predecessors, (9543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 9543 transitions. [2021-06-12 15:33:02,160 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 9543 transitions. Word has length 155 [2021-06-12 15:33:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:02,160 INFO L482 AbstractCegarLoop]: Abstraction has 3478 states and 9543 transitions. [2021-06-12 15:33:02,160 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 15:33:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 9543 transitions. [2021-06-12 15:33:02,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:02,163 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:02,163 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 15:33:02,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-12 15:33:02,364 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1654301034, now seen corresponding path program 297 times [2021-06-12 15:33:02,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:02,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510704184] [2021-06-12 15:33:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:02,694 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 15:33:02,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:02,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510704184] [2021-06-12 15:33:02,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510704184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:02,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143332880] [2021-06-12 15:33:02,694 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 15:33:02,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:33:02,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:02,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:02,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:02,979 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 15:33:02,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143332880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:02,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:02,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:02,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574167159] [2021-06-12 15:33:02,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:02,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:02,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:02,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:02,980 INFO L87 Difference]: Start difference. First operand 3478 states and 9543 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 15:33:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:03,619 INFO L93 Difference]: Finished difference Result 5641 states and 14072 transitions. [2021-06-12 15:33:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:33:03,619 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 15:33:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:03,623 INFO L225 Difference]: With dead ends: 5641 [2021-06-12 15:33:03,623 INFO L226 Difference]: Without dead ends: 5371 [2021-06-12 15:33:03,624 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 790.2ms TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:33:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-06-12 15:33:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 3553. [2021-06-12 15:33:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 3552 states have (on average 2.75) internal successors, (9768), 3552 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 9768 transitions. [2021-06-12 15:33:03,657 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 9768 transitions. Word has length 155 [2021-06-12 15:33:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:03,658 INFO L482 AbstractCegarLoop]: Abstraction has 3553 states and 9768 transitions. [2021-06-12 15:33:03,658 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 15:33:03,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 9768 transitions. [2021-06-12 15:33:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:03,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:03,661 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 15:33:03,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:03,861 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:03,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:03,862 INFO L82 PathProgramCache]: Analyzing trace with hash -237908360, now seen corresponding path program 298 times [2021-06-12 15:33:03,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:03,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102097674] [2021-06-12 15:33:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:04,193 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 15:33:04,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102097674] [2021-06-12 15:33:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102097674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612430558] [2021-06-12 15:33:04,194 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 15:33:04,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:04,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:04,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:04,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:04,452 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 15:33:04,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612430558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:04,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:04,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:04,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381218948] [2021-06-12 15:33:04,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:04,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:04,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:04,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:04,453 INFO L87 Difference]: Start difference. First operand 3553 states and 9768 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 15:33:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:05,053 INFO L93 Difference]: Finished difference Result 5671 states and 14207 transitions. [2021-06-12 15:33:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:33:05,053 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 15:33:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:05,058 INFO L225 Difference]: With dead ends: 5671 [2021-06-12 15:33:05,058 INFO L226 Difference]: Without dead ends: 5401 [2021-06-12 15:33:05,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 731.9ms TimeCoverageRelationStatistics Valid=991, Invalid=2915, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:33:05,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-12 15:33:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 3628. [2021-06-12 15:33:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 2.7551695616211744) internal successors, (9993), 3627 states have internal predecessors, (9993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 9993 transitions. [2021-06-12 15:33:05,094 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 9993 transitions. Word has length 155 [2021-06-12 15:33:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:05,094 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 9993 transitions. [2021-06-12 15:33:05,094 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 15:33:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 9993 transitions. [2021-06-12 15:33:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:05,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:05,097 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 15:33:05,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:05,298 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:05,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:05,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1603438440, now seen corresponding path program 299 times [2021-06-12 15:33:05,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:05,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089279096] [2021-06-12 15:33:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:05,640 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 15:33:05,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:05,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089279096] [2021-06-12 15:33:05,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089279096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:05,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059627016] [2021-06-12 15:33:05,641 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 15:33:05,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:33:05,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:05,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:05,927 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 15:33:05,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059627016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:05,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:05,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:05,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652476586] [2021-06-12 15:33:05,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:05,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:05,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:05,928 INFO L87 Difference]: Start difference. First operand 3628 states and 9993 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 15:33:06,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:06,619 INFO L93 Difference]: Finished difference Result 5696 states and 14332 transitions. [2021-06-12 15:33:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:33:06,620 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 15:33:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:06,625 INFO L225 Difference]: With dead ends: 5696 [2021-06-12 15:33:06,625 INFO L226 Difference]: Without dead ends: 5426 [2021-06-12 15:33:06,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:33:06,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-12 15:33:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 3703. [2021-06-12 15:33:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.760129659643436) internal successors, (10218), 3702 states have internal predecessors, (10218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 10218 transitions. [2021-06-12 15:33:06,662 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 10218 transitions. Word has length 155 [2021-06-12 15:33:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:06,662 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 10218 transitions. [2021-06-12 15:33:06,663 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 15:33:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 10218 transitions. [2021-06-12 15:33:06,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:06,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:06,665 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 15:33:06,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:06,866 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:06,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:06,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1809969674, now seen corresponding path program 300 times [2021-06-12 15:33:06,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:06,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733375889] [2021-06-12 15:33:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:07,181 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 15:33:07,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:07,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733375889] [2021-06-12 15:33:07,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733375889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:07,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92290309] [2021-06-12 15:33:07,182 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 15:33:07,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:33:07,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:07,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:07,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:07,451 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 15:33:07,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92290309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:07,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:07,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:07,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231760554] [2021-06-12 15:33:07,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:07,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:07,452 INFO L87 Difference]: Start difference. First operand 3703 states and 10218 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 15:33:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:08,100 INFO L93 Difference]: Finished difference Result 5721 states and 14457 transitions. [2021-06-12 15:33:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:33:08,101 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 15:33:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:08,106 INFO L225 Difference]: With dead ends: 5721 [2021-06-12 15:33:08,106 INFO L226 Difference]: Without dead ends: 5451 [2021-06-12 15:33:08,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 757.2ms TimeCoverageRelationStatistics Valid=1021, Invalid=3139, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:33:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-12 15:33:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 3778. [2021-06-12 15:33:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3777 states have (on average 2.7648927720413026) internal successors, (10443), 3777 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 10443 transitions. [2021-06-12 15:33:08,147 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 10443 transitions. Word has length 155 [2021-06-12 15:33:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:08,147 INFO L482 AbstractCegarLoop]: Abstraction has 3778 states and 10443 transitions. [2021-06-12 15:33:08,147 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 15:33:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 10443 transitions. [2021-06-12 15:33:08,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:08,150 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:08,150 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 15:33:08,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-12 15:33:08,350 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:08,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1842623206, now seen corresponding path program 301 times [2021-06-12 15:33:08,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:08,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796278248] [2021-06-12 15:33:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:08,657 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 15:33:08,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:08,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796278248] [2021-06-12 15:33:08,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796278248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:08,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125996818] [2021-06-12 15:33:08,657 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 15:33:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:08,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:08,950 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 15:33:08,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125996818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:08,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:08,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:08,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240183677] [2021-06-12 15:33:08,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:08,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:08,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:08,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:08,951 INFO L87 Difference]: Start difference. First operand 3778 states and 10443 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 15:33:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:09,707 INFO L93 Difference]: Finished difference Result 5746 states and 14582 transitions. [2021-06-12 15:33:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:33:09,707 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 15:33:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:09,713 INFO L225 Difference]: With dead ends: 5746 [2021-06-12 15:33:09,713 INFO L226 Difference]: Without dead ends: 5476 [2021-06-12 15:33:09,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 841.7ms TimeCoverageRelationStatistics Valid=1045, Invalid=3377, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:33:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-12 15:33:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 3853. [2021-06-12 15:33:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 3852 states have (on average 2.769470404984424) internal successors, (10668), 3852 states have internal predecessors, (10668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 10668 transitions. [2021-06-12 15:33:09,755 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 10668 transitions. Word has length 155 [2021-06-12 15:33:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:09,755 INFO L482 AbstractCegarLoop]: Abstraction has 3853 states and 10668 transitions. [2021-06-12 15:33:09,755 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 15:33:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 10668 transitions. [2021-06-12 15:33:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:09,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:09,758 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 15:33:09,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-12 15:33:09,959 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:09,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1796076276, now seen corresponding path program 302 times [2021-06-12 15:33:09,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:09,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643398706] [2021-06-12 15:33:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:10,255 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 15:33:10,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:10,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643398706] [2021-06-12 15:33:10,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643398706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:10,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413269142] [2021-06-12 15:33:10,255 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 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 15:33:10,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:10,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:10,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:10,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:10,581 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 15:33:10,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413269142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:10,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:10,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:10,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932421283] [2021-06-12 15:33:10,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:10,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:10,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:10,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:10,582 INFO L87 Difference]: Start difference. First operand 3853 states and 10668 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 15:33:11,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:11,309 INFO L93 Difference]: Finished difference Result 5771 states and 14707 transitions. [2021-06-12 15:33:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:33:11,309 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 15:33:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:11,314 INFO L225 Difference]: With dead ends: 5771 [2021-06-12 15:33:11,315 INFO L226 Difference]: Without dead ends: 5501 [2021-06-12 15:33:11,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 787.5ms TimeCoverageRelationStatistics Valid=1067, Invalid=3355, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:33:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-12 15:33:11,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 3928. [2021-06-12 15:33:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 2.7738731856378913) internal successors, (10893), 3927 states have internal predecessors, (10893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10893 transitions. [2021-06-12 15:33:11,357 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10893 transitions. Word has length 155 [2021-06-12 15:33:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:11,357 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 10893 transitions. [2021-06-12 15:33:11,357 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 15:33:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10893 transitions. [2021-06-12 15:33:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:11,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:11,360 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 15:33:11,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-12 15:33:11,560 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash 877691876, now seen corresponding path program 303 times [2021-06-12 15:33:11,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:11,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040722692] [2021-06-12 15:33:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:11,857 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 15:33:11,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:11,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040722692] [2021-06-12 15:33:11,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040722692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:11,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241141563] [2021-06-12 15:33:11,857 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 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 15:33:11,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:33:11,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:11,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:12,139 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 15:33:12,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241141563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:12,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:12,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:12,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919196869] [2021-06-12 15:33:12,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:12,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:12,141 INFO L87 Difference]: Start difference. First operand 3928 states and 10893 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 15:33:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:12,957 INFO L93 Difference]: Finished difference Result 5796 states and 14832 transitions. [2021-06-12 15:33:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:33:12,957 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 15:33:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:12,962 INFO L225 Difference]: With dead ends: 5796 [2021-06-12 15:33:12,962 INFO L226 Difference]: Without dead ends: 5526 [2021-06-12 15:33:12,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 878.8ms TimeCoverageRelationStatistics Valid=1093, Invalid=3599, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:33:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-06-12 15:33:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4003. [2021-06-12 15:33:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.7781109445277363) internal successors, (11118), 4002 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11118 transitions. [2021-06-12 15:33:13,002 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11118 transitions. Word has length 155 [2021-06-12 15:33:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:13,002 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11118 transitions. [2021-06-12 15:33:13,002 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 15:33:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11118 transitions. [2021-06-12 15:33:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:13,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:13,005 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 15:33:13,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-12 15:33:13,205 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:13,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:13,206 INFO L82 PathProgramCache]: Analyzing trace with hash -898998926, now seen corresponding path program 304 times [2021-06-12 15:33:13,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:13,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028568601] [2021-06-12 15:33:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:13,493 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 15:33:13,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:13,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028568601] [2021-06-12 15:33:13,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028568601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:13,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721204733] [2021-06-12 15:33:13,494 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 15:33:13,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:13,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:13,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:13,746 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 15:33:13,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721204733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:13,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:13,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:13,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515584259] [2021-06-12 15:33:13,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:13,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:13,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:13,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:13,747 INFO L87 Difference]: Start difference. First operand 4003 states and 11118 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 15:33:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:14,489 INFO L93 Difference]: Finished difference Result 5821 states and 14957 transitions. [2021-06-12 15:33:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:33:14,489 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 15:33:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:14,494 INFO L225 Difference]: With dead ends: 5821 [2021-06-12 15:33:14,494 INFO L226 Difference]: Without dead ends: 5551 [2021-06-12 15:33:14,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 803.5ms TimeCoverageRelationStatistics Valid=1129, Invalid=3563, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:33:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-12 15:33:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4078. [2021-06-12 15:33:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 2.7821927888153053) internal successors, (11343), 4077 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 11343 transitions. [2021-06-12 15:33:14,535 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 11343 transitions. Word has length 155 [2021-06-12 15:33:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:14,535 INFO L482 AbstractCegarLoop]: Abstraction has 4078 states and 11343 transitions. [2021-06-12 15:33:14,535 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 15:33:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 11343 transitions. [2021-06-12 15:33:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:14,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:14,538 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 15:33:14,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-12 15:33:14,738 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:14,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1200642658, now seen corresponding path program 305 times [2021-06-12 15:33:14,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:14,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941768254] [2021-06-12 15:33:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:15,031 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 15:33:15,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:15,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941768254] [2021-06-12 15:33:15,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941768254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:15,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073052824] [2021-06-12 15:33:15,032 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 15:33:15,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:33:15,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:15,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:15,305 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 15:33:15,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073052824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:15,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:15,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:15,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231885708] [2021-06-12 15:33:15,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:15,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:15,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:15,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:15,306 INFO L87 Difference]: Start difference. First operand 4078 states and 11343 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 15:33:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:16,162 INFO L93 Difference]: Finished difference Result 5846 states and 15082 transitions. [2021-06-12 15:33:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:33:16,163 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 15:33:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:16,168 INFO L225 Difference]: With dead ends: 5846 [2021-06-12 15:33:16,168 INFO L226 Difference]: Without dead ends: 5576 [2021-06-12 15:33:16,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 931.2ms TimeCoverageRelationStatistics Valid=1157, Invalid=3813, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:33:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-06-12 15:33:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4153. [2021-06-12 15:33:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 2.786127167630058) internal successors, (11568), 4152 states have internal predecessors, (11568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 11568 transitions. [2021-06-12 15:33:16,210 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 11568 transitions. Word has length 155 [2021-06-12 15:33:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:16,210 INFO L482 AbstractCegarLoop]: Abstraction has 4153 states and 11568 transitions. [2021-06-12 15:33:16,210 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 15:33:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 11568 transitions. [2021-06-12 15:33:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:16,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:16,213 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 15:33:16,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-12 15:33:16,414 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:16,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1584124560, now seen corresponding path program 306 times [2021-06-12 15:33:16,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:16,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690645474] [2021-06-12 15:33:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:16,688 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 15:33:16,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:16,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690645474] [2021-06-12 15:33:16,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690645474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:16,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147256412] [2021-06-12 15:33:16,689 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 15:33:16,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:33:16,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:16,951 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 15:33:16,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147256412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:16,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:16,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:16,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393532014] [2021-06-12 15:33:16,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:16,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:16,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:16,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:16,952 INFO L87 Difference]: Start difference. First operand 4153 states and 11568 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 15:33:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:17,751 INFO L93 Difference]: Finished difference Result 5871 states and 15207 transitions. [2021-06-12 15:33:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:33:17,751 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 15:33:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:17,756 INFO L225 Difference]: With dead ends: 5871 [2021-06-12 15:33:17,756 INFO L226 Difference]: Without dead ends: 5601 [2021-06-12 15:33:17,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 836.8ms TimeCoverageRelationStatistics Valid=1207, Invalid=3763, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:33:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-12 15:33:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4228. [2021-06-12 15:33:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.7899219304471257) internal successors, (11793), 4227 states have internal predecessors, (11793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11793 transitions. [2021-06-12 15:33:17,797 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11793 transitions. Word has length 155 [2021-06-12 15:33:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:17,797 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11793 transitions. [2021-06-12 15:33:17,797 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 15:33:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11793 transitions. [2021-06-12 15:33:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:17,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:17,800 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 15:33:18,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-12 15:33:18,001 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash -944466336, now seen corresponding path program 307 times [2021-06-12 15:33:18,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:18,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599165907] [2021-06-12 15:33:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:18,280 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 15:33:18,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:18,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599165907] [2021-06-12 15:33:18,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599165907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:18,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029277102] [2021-06-12 15:33:18,280 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 15:33:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:18,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:18,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:18,550 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 15:33:18,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029277102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:18,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:18,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:18,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031010507] [2021-06-12 15:33:18,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:18,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:18,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:18,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:18,551 INFO L87 Difference]: Start difference. First operand 4228 states and 11793 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 15:33:19,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:19,488 INFO L93 Difference]: Finished difference Result 5896 states and 15332 transitions. [2021-06-12 15:33:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:33:19,488 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 15:33:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:19,493 INFO L225 Difference]: With dead ends: 5896 [2021-06-12 15:33:19,493 INFO L226 Difference]: Without dead ends: 5626 [2021-06-12 15:33:19,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 979.0ms TimeCoverageRelationStatistics Valid=1237, Invalid=4019, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:33:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-12 15:33:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4303. [2021-06-12 15:33:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 2.793584379358438) internal successors, (12018), 4302 states have internal predecessors, (12018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 12018 transitions. [2021-06-12 15:33:19,539 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 12018 transitions. Word has length 155 [2021-06-12 15:33:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:19,539 INFO L482 AbstractCegarLoop]: Abstraction has 4303 states and 12018 transitions. [2021-06-12 15:33:19,539 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 15:33:19,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 12018 transitions. [2021-06-12 15:33:19,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:19,542 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:19,542 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 15:33:19,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:19,742 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:19,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:19,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1719385362, now seen corresponding path program 308 times [2021-06-12 15:33:19,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:19,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838914900] [2021-06-12 15:33:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:20,010 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 15:33:20,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:20,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838914900] [2021-06-12 15:33:20,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838914900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:20,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695686478] [2021-06-12 15:33:20,011 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 15:33:20,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:20,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:20,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:20,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:20,261 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 15:33:20,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695686478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:20,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:20,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:20,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77445548] [2021-06-12 15:33:20,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:20,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:20,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:20,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:20,262 INFO L87 Difference]: Start difference. First operand 4303 states and 12018 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 15:33:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:21,116 INFO L93 Difference]: Finished difference Result 5921 states and 15457 transitions. [2021-06-12 15:33:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:33:21,116 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 15:33:21,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:21,121 INFO L225 Difference]: With dead ends: 5921 [2021-06-12 15:33:21,121 INFO L226 Difference]: Without dead ends: 5651 [2021-06-12 15:33:21,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 871.4ms TimeCoverageRelationStatistics Valid=1301, Invalid=3955, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:33:21,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-12 15:33:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4378. [2021-06-12 15:33:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 2.7971213159698425) internal successors, (12243), 4377 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 12243 transitions. [2021-06-12 15:33:21,167 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 12243 transitions. Word has length 155 [2021-06-12 15:33:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:21,167 INFO L482 AbstractCegarLoop]: Abstraction has 4378 states and 12243 transitions. [2021-06-12 15:33:21,168 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 15:33:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 12243 transitions. [2021-06-12 15:33:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:21,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:21,171 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 15:33:21,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-12 15:33:21,371 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2121668574, now seen corresponding path program 309 times [2021-06-12 15:33:21,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:21,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916792914] [2021-06-12 15:33:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:21,643 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 15:33:21,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:21,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916792914] [2021-06-12 15:33:21,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916792914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:21,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105659514] [2021-06-12 15:33:21,643 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 15:33:21,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:33:21,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:21,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:21,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:21,922 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 15:33:21,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105659514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:21,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:21,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:21,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734914094] [2021-06-12 15:33:21,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:21,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:21,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:21,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:21,923 INFO L87 Difference]: Start difference. First operand 4378 states and 12243 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 15:33:22,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:22,952 INFO L93 Difference]: Finished difference Result 5946 states and 15582 transitions. [2021-06-12 15:33:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:33:22,953 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 15:33:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:22,957 INFO L225 Difference]: With dead ends: 5946 [2021-06-12 15:33:22,957 INFO L226 Difference]: Without dead ends: 5676 [2021-06-12 15:33:22,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 1030.3ms TimeCoverageRelationStatistics Valid=1333, Invalid=4217, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:33:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-12 15:33:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4453. [2021-06-12 15:33:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 2.8005390835579513) internal successors, (12468), 4452 states have internal predecessors, (12468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 12468 transitions. [2021-06-12 15:33:23,005 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 12468 transitions. Word has length 155 [2021-06-12 15:33:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:23,005 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 12468 transitions. [2021-06-12 15:33:23,005 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 15:33:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 12468 transitions. [2021-06-12 15:33:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:23,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:23,009 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 15:33:23,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:23,209 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:23,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1295286804, now seen corresponding path program 310 times [2021-06-12 15:33:23,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:23,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851226684] [2021-06-12 15:33:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:23,472 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 15:33:23,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:23,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851226684] [2021-06-12 15:33:23,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851226684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:23,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128966471] [2021-06-12 15:33:23,473 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 15:33:23,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:23,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:23,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:23,723 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 15:33:23,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128966471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:23,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:23,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:23,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118227068] [2021-06-12 15:33:23,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:23,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:23,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:23,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:23,724 INFO L87 Difference]: Start difference. First operand 4453 states and 12468 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 15:33:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:24,668 INFO L93 Difference]: Finished difference Result 5971 states and 15707 transitions. [2021-06-12 15:33:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:33:24,669 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 15:33:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:24,673 INFO L225 Difference]: With dead ends: 5971 [2021-06-12 15:33:24,673 INFO L226 Difference]: Without dead ends: 5701 [2021-06-12 15:33:24,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 900.4ms TimeCoverageRelationStatistics Valid=1411, Invalid=4139, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:33:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2021-06-12 15:33:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 4528. [2021-06-12 15:33:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 2.803843605036448) internal successors, (12693), 4527 states have internal predecessors, (12693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 12693 transitions. [2021-06-12 15:33:24,721 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 12693 transitions. Word has length 155 [2021-06-12 15:33:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:24,721 INFO L482 AbstractCegarLoop]: Abstraction has 4528 states and 12693 transitions. [2021-06-12 15:33:24,721 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 15:33:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 12693 transitions. [2021-06-12 15:33:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:24,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:24,724 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 15:33:24,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-12 15:33:24,925 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:24,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2099625692, now seen corresponding path program 311 times [2021-06-12 15:33:24,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:24,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062597101] [2021-06-12 15:33:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:25,194 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 15:33:25,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:25,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062597101] [2021-06-12 15:33:25,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062597101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:25,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740430365] [2021-06-12 15:33:25,195 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 15:33:25,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:33:25,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:25,462 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 15:33:25,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740430365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:25,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:25,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:25,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545833005] [2021-06-12 15:33:25,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:25,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:25,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:25,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:25,463 INFO L87 Difference]: Start difference. First operand 4528 states and 12693 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 15:33:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:26,547 INFO L93 Difference]: Finished difference Result 5996 states and 15832 transitions. [2021-06-12 15:33:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:33:26,547 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 15:33:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:26,552 INFO L225 Difference]: With dead ends: 5996 [2021-06-12 15:33:26,552 INFO L226 Difference]: Without dead ends: 5726 [2021-06-12 15:33:26,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 1069.7ms TimeCoverageRelationStatistics Valid=1445, Invalid=4407, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:33:26,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2021-06-12 15:33:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 4603. [2021-06-12 15:33:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 2.8070404172099086) internal successors, (12918), 4602 states have internal predecessors, (12918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 12918 transitions. [2021-06-12 15:33:26,598 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 12918 transitions. Word has length 155 [2021-06-12 15:33:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:26,598 INFO L482 AbstractCegarLoop]: Abstraction has 4603 states and 12918 transitions. [2021-06-12 15:33:26,598 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 15:33:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 12918 transitions. [2021-06-12 15:33:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:26,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:26,601 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 15:33:26,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:26,802 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:26,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1670561386, now seen corresponding path program 312 times [2021-06-12 15:33:26,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:26,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463560903] [2021-06-12 15:33:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:27,057 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 15:33:27,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:27,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463560903] [2021-06-12 15:33:27,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463560903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:27,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927625047] [2021-06-12 15:33:27,057 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 15:33:27,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:33:27,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:27,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:27,322 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 15:33:27,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927625047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:27,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:27,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:27,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307161213] [2021-06-12 15:33:27,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:27,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:27,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:27,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:27,323 INFO L87 Difference]: Start difference. First operand 4603 states and 12918 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 15:33:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:28,272 INFO L93 Difference]: Finished difference Result 6021 states and 15957 transitions. [2021-06-12 15:33:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:33:28,272 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 15:33:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:28,277 INFO L225 Difference]: With dead ends: 6021 [2021-06-12 15:33:28,277 INFO L226 Difference]: Without dead ends: 5751 [2021-06-12 15:33:28,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 921.7ms TimeCoverageRelationStatistics Valid=1537, Invalid=4315, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:33:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-06-12 15:33:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 4678. [2021-06-12 15:33:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 2.8101347017318794) internal successors, (13143), 4677 states have internal predecessors, (13143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 13143 transitions. [2021-06-12 15:33:28,323 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 13143 transitions. Word has length 155 [2021-06-12 15:33:28,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:28,324 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 13143 transitions. [2021-06-12 15:33:28,324 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 15:33:28,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 13143 transitions. [2021-06-12 15:33:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:28,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:28,327 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 15:33:28,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:28,528 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:28,528 INFO L82 PathProgramCache]: Analyzing trace with hash 984378202, now seen corresponding path program 313 times [2021-06-12 15:33:28,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:28,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56449583] [2021-06-12 15:33:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:28,793 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 15:33:28,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:28,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56449583] [2021-06-12 15:33:28,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56449583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:28,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963354872] [2021-06-12 15:33:28,794 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 15:33:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:28,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:28,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:29,056 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 15:33:29,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963354872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:29,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:29,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:29,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464963685] [2021-06-12 15:33:29,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:29,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:29,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:29,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:29,057 INFO L87 Difference]: Start difference. First operand 4678 states and 13143 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 15:33:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:30,213 INFO L93 Difference]: Finished difference Result 6046 states and 16082 transitions. [2021-06-12 15:33:30,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:33:30,214 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 15:33:30,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:30,219 INFO L225 Difference]: With dead ends: 6046 [2021-06-12 15:33:30,219 INFO L226 Difference]: Without dead ends: 5776 [2021-06-12 15:33:30,219 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1113.3ms TimeCoverageRelationStatistics Valid=1573, Invalid=4589, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:33:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5776 states. [2021-06-12 15:33:30,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5776 to 4753. [2021-06-12 15:33:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4753 states, 4752 states have (on average 2.813131313131313) internal successors, (13368), 4752 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 13368 transitions. [2021-06-12 15:33:30,268 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 13368 transitions. Word has length 155 [2021-06-12 15:33:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:30,269 INFO L482 AbstractCegarLoop]: Abstraction has 4753 states and 13368 transitions. [2021-06-12 15:33:30,269 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 15:33:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 13368 transitions. [2021-06-12 15:33:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:30,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:30,272 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 15:33:30,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-12 15:33:30,473 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:30,473 INFO L82 PathProgramCache]: Analyzing trace with hash 899343464, now seen corresponding path program 314 times [2021-06-12 15:33:30,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:30,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788515559] [2021-06-12 15:33:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:30,746 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 15:33:30,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:30,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788515559] [2021-06-12 15:33:30,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788515559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:30,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123029405] [2021-06-12 15:33:30,746 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 15:33:30,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:30,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:31,010 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 15:33:31,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123029405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:31,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:31,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:31,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091285568] [2021-06-12 15:33:31,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:31,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:31,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:31,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:31,011 INFO L87 Difference]: Start difference. First operand 4753 states and 13368 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 15:33:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:32,007 INFO L93 Difference]: Finished difference Result 6071 states and 16207 transitions. [2021-06-12 15:33:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:33:32,007 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 15:33:32,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:32,012 INFO L225 Difference]: With dead ends: 6071 [2021-06-12 15:33:32,012 INFO L226 Difference]: Without dead ends: 5801 [2021-06-12 15:33:32,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 955.6ms TimeCoverageRelationStatistics Valid=1679, Invalid=4483, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:33:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-12 15:33:32,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4828. [2021-06-12 15:33:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.8160348042262275) internal successors, (13593), 4827 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13593 transitions. [2021-06-12 15:33:32,061 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13593 transitions. Word has length 155 [2021-06-12 15:33:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:32,061 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13593 transitions. [2021-06-12 15:33:32,061 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 15:33:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13593 transitions. [2021-06-12 15:33:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:32,065 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:32,065 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 15:33:32,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-12 15:33:32,265 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:32,266 INFO L82 PathProgramCache]: Analyzing trace with hash 831192408, now seen corresponding path program 315 times [2021-06-12 15:33:32,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:32,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200316804] [2021-06-12 15:33:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:32,531 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 15:33:32,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:32,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200316804] [2021-06-12 15:33:32,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200316804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:32,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706415270] [2021-06-12 15:33:32,532 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 15:33:32,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 15:33:32,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:32,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:32,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:32,803 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 15:33:32,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706415270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:32,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:32,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:32,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071580577] [2021-06-12 15:33:32,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:32,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:32,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:32,804 INFO L87 Difference]: Start difference. First operand 4828 states and 13593 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 15:33:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:34,007 INFO L93 Difference]: Finished difference Result 6096 states and 16332 transitions. [2021-06-12 15:33:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:33:34,007 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 15:33:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:34,013 INFO L225 Difference]: With dead ends: 6096 [2021-06-12 15:33:34,013 INFO L226 Difference]: Without dead ends: 5826 [2021-06-12 15:33:34,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1153.6ms TimeCoverageRelationStatistics Valid=1717, Invalid=4763, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:33:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-12 15:33:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 4903. [2021-06-12 15:33:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4902 states have (on average 2.8188494492044063) internal successors, (13818), 4902 states have internal predecessors, (13818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 13818 transitions. [2021-06-12 15:33:34,063 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 13818 transitions. Word has length 155 [2021-06-12 15:33:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:34,063 INFO L482 AbstractCegarLoop]: Abstraction has 4903 states and 13818 transitions. [2021-06-12 15:33:34,063 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 15:33:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 13818 transitions. [2021-06-12 15:33:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:34,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:34,067 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 15:33:34,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-12 15:33:34,267 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:34,267 INFO L82 PathProgramCache]: Analyzing trace with hash -465776666, now seen corresponding path program 316 times [2021-06-12 15:33:34,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:34,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094067489] [2021-06-12 15:33:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:34,527 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 15:33:34,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:34,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094067489] [2021-06-12 15:33:34,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094067489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:34,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458374448] [2021-06-12 15:33:34,528 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 15:33:34,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:34,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:34,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:34,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:34,766 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 15:33:34,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458374448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:34,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:34,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:34,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273979233] [2021-06-12 15:33:34,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:34,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:34,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:34,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:34,767 INFO L87 Difference]: Start difference. First operand 4903 states and 13818 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 15:33:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:35,798 INFO L93 Difference]: Finished difference Result 6166 states and 16577 transitions. [2021-06-12 15:33:35,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:33:35,799 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 15:33:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:35,804 INFO L225 Difference]: With dead ends: 6166 [2021-06-12 15:33:35,804 INFO L226 Difference]: Without dead ends: 5896 [2021-06-12 15:33:35,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 974.8ms TimeCoverageRelationStatistics Valid=1837, Invalid=4643, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:33:35,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5896 states. [2021-06-12 15:33:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5896 to 4978. [2021-06-12 15:33:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4977 states have (on average 2.824593128390597) internal successors, (14058), 4977 states have internal predecessors, (14058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 14058 transitions. [2021-06-12 15:33:35,852 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 14058 transitions. Word has length 155 [2021-06-12 15:33:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:35,852 INFO L482 AbstractCegarLoop]: Abstraction has 4978 states and 14058 transitions. [2021-06-12 15:33:35,852 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 15:33:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 14058 transitions. [2021-06-12 15:33:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:35,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:35,856 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 15:33:36,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-12 15:33:36,056 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash -36023082, now seen corresponding path program 317 times [2021-06-12 15:33:36,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:36,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557671786] [2021-06-12 15:33:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:36,317 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 15:33:36,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:36,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557671786] [2021-06-12 15:33:36,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557671786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:36,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938653312] [2021-06-12 15:33:36,317 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 15:33:36,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 15:33:36,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:36,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:36,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:36,579 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 15:33:36,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938653312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:36,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:36,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:36,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403362333] [2021-06-12 15:33:36,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:36,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:36,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:36,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:36,580 INFO L87 Difference]: Start difference. First operand 4978 states and 14058 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 15:33:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:37,873 INFO L93 Difference]: Finished difference Result 6744 states and 18203 transitions. [2021-06-12 15:33:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:33:37,873 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 15:33:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:37,879 INFO L225 Difference]: With dead ends: 6744 [2021-06-12 15:33:37,879 INFO L226 Difference]: Without dead ends: 6121 [2021-06-12 15:33:37,879 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 1235.4ms TimeCoverageRelationStatistics Valid=1898, Invalid=5242, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:33:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6121 states. [2021-06-12 15:33:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6121 to 5053. [2021-06-12 15:33:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 5052 states have (on average 2.8281868566904196) internal successors, (14288), 5052 states have internal predecessors, (14288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 14288 transitions. [2021-06-12 15:33:37,929 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 14288 transitions. Word has length 155 [2021-06-12 15:33:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:37,929 INFO L482 AbstractCegarLoop]: Abstraction has 5053 states and 14288 transitions. [2021-06-12 15:33:37,929 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 15:33:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 14288 transitions. [2021-06-12 15:33:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:37,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:37,933 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 15:33:38,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:38,133 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:38,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:38,134 INFO L82 PathProgramCache]: Analyzing trace with hash -93757212, now seen corresponding path program 318 times [2021-06-12 15:33:38,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:38,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918122978] [2021-06-12 15:33:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:38,398 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 15:33:38,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:38,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918122978] [2021-06-12 15:33:38,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918122978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:38,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509625237] [2021-06-12 15:33:38,398 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 15:33:38,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 15:33:38,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:38,674 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 15:33:38,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509625237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:38,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:38,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 15:33:38,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055014110] [2021-06-12 15:33:38,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 15:33:38,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:38,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 15:33:38,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:33:38,675 INFO L87 Difference]: Start difference. First operand 5053 states and 14288 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 15:33:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:39,703 INFO L93 Difference]: Finished difference Result 6948 states and 18871 transitions. [2021-06-12 15:33:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:33:39,704 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 15:33:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:39,710 INFO L225 Difference]: With dead ends: 6948 [2021-06-12 15:33:39,710 INFO L226 Difference]: Without dead ends: 6678 [2021-06-12 15:33:39,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=2012, Invalid=4794, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:33:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-06-12 15:33:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 5233. [2021-06-12 15:33:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.8377293577981653) internal successors, (14847), 5232 states have internal predecessors, (14847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 14847 transitions. [2021-06-12 15:33:39,770 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 14847 transitions. Word has length 155 [2021-06-12 15:33:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:39,770 INFO L482 AbstractCegarLoop]: Abstraction has 5233 states and 14847 transitions. [2021-06-12 15:33:39,770 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 15:33:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 14847 transitions. [2021-06-12 15:33:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-12 15:33:39,774 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:39,774 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 15:33:39,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-12 15:33:39,974 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash -71413962, now seen corresponding path program 319 times [2021-06-12 15:33:39,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:39,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127364449] [2021-06-12 15:33:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:40,267 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 15:33:40,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:40,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127364449] [2021-06-12 15:33:40,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127364449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:40,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212803094] [2021-06-12 15:33:40,268 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 15:33:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:40,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 15:33:40,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:40,527 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 15:33:40,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212803094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:40,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:40,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-12 15:33:40,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620823156] [2021-06-12 15:33:40,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:40,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:40,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:40,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:40,528 INFO L87 Difference]: Start difference. First operand 5233 states and 14847 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 15:33:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:41,764 INFO L93 Difference]: Finished difference Result 6410 states and 17521 transitions. [2021-06-12 15:33:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:33:41,764 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 15:33:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:41,770 INFO L225 Difference]: With dead ends: 6410 [2021-06-12 15:33:41,770 INFO L226 Difference]: Without dead ends: 5921 [2021-06-12 15:33:41,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 1250.7ms TimeCoverageRelationStatistics Valid=2056, Invalid=5084, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:33:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5921 states. [2021-06-12 15:33:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5921 to 5178. [2021-06-12 15:33:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.836198570600734) internal successors, (14683), 5177 states have internal predecessors, (14683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 14683 transitions. [2021-06-12 15:33:41,848 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 14683 transitions. Word has length 155 [2021-06-12 15:33:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:41,848 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 14683 transitions. [2021-06-12 15:33:41,848 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 15:33:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 14683 transitions. [2021-06-12 15:33:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:41,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:41,852 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 15:33:42,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:42,053 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash -842046282, now seen corresponding path program 320 times [2021-06-12 15:33:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:42,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868507267] [2021-06-12 15:33:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:42,386 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 15:33:42,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:42,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868507267] [2021-06-12 15:33:42,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868507267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:42,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906212107] [2021-06-12 15:33:42,386 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 15:33:42,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:42,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:33:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:42,693 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 15:33:42,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906212107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:42,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:42,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2021-06-12 15:33:42,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817655997] [2021-06-12 15:33:42,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:33:42,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:42,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:33:42,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:33:42,694 INFO L87 Difference]: Start difference. First operand 5178 states and 14683 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 15:33:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:43,368 INFO L93 Difference]: Finished difference Result 6468 states and 17583 transitions. [2021-06-12 15:33:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:33:43,369 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 15:33:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:43,375 INFO L225 Difference]: With dead ends: 6468 [2021-06-12 15:33:43,375 INFO L226 Difference]: Without dead ends: 6134 [2021-06-12 15:33:43,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 818.0ms TimeCoverageRelationStatistics Valid=1165, Invalid=3125, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:33:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2021-06-12 15:33:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 5263. [2021-06-12 15:33:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5263 states, 5262 states have (on average 2.822690992018244) internal successors, (14853), 5262 states have internal predecessors, (14853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 14853 transitions. [2021-06-12 15:33:43,456 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 14853 transitions. Word has length 160 [2021-06-12 15:33:43,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:43,457 INFO L482 AbstractCegarLoop]: Abstraction has 5263 states and 14853 transitions. [2021-06-12 15:33:43,457 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 15:33:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 14853 transitions. [2021-06-12 15:33:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:43,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:43,460 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 15:33:43,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-12 15:33:43,661 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1096521818, now seen corresponding path program 321 times [2021-06-12 15:33:43,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:43,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028280003] [2021-06-12 15:33:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:44,000 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 15:33:44,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:44,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028280003] [2021-06-12 15:33:44,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028280003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:44,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794613014] [2021-06-12 15:33:44,001 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 15:33:44,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:33:44,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:44,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:44,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:44,280 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 15:33:44,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794613014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:44,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:44,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:44,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65206013] [2021-06-12 15:33:44,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:44,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:44,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:44,281 INFO L87 Difference]: Start difference. First operand 5263 states and 14853 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 15:33:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:44,835 INFO L93 Difference]: Finished difference Result 7561 states and 19577 transitions. [2021-06-12 15:33:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:33:44,835 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 15:33:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:44,842 INFO L225 Difference]: With dead ends: 7561 [2021-06-12 15:33:44,843 INFO L226 Difference]: Without dead ends: 7291 [2021-06-12 15:33:44,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 715.2ms TimeCoverageRelationStatistics Valid=988, Invalid=2552, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:33:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7291 states. [2021-06-12 15:33:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7291 to 5278. [2021-06-12 15:33:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:33:44,894 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:33:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:44,894 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:33:44,894 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 15:33:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:33:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:44,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:44,898 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 15:33:45,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:45,098 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:45,098 INFO L82 PathProgramCache]: Analyzing trace with hash 251033930, now seen corresponding path program 322 times [2021-06-12 15:33:45,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:45,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163540427] [2021-06-12 15:33:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:45,483 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 15:33:45,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:45,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163540427] [2021-06-12 15:33:45,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163540427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:45,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463269360] [2021-06-12 15:33:45,483 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 15:33:45,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:45,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:45,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:45,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:45,762 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 15:33:45,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463269360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:45,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:45,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:45,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172869136] [2021-06-12 15:33:45,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:45,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:45,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:45,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:45,763 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:33:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:46,399 INFO L93 Difference]: Finished difference Result 7446 states and 19347 transitions. [2021-06-12 15:33:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:33:46,399 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 15:33:46,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:46,406 INFO L225 Difference]: With dead ends: 7446 [2021-06-12 15:33:46,406 INFO L226 Difference]: Without dead ends: 7176 [2021-06-12 15:33:46,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=1067, Invalid=2965, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:33:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-06-12 15:33:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 5278. [2021-06-12 15:33:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:33:46,458 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:33:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:46,458 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:33:46,458 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 15:33:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:33:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:46,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:46,462 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 15:33:46,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-12 15:33:46,663 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1654969128, now seen corresponding path program 323 times [2021-06-12 15:33:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:46,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014921110] [2021-06-12 15:33:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:47,017 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 15:33:47,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:47,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014921110] [2021-06-12 15:33:47,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014921110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:47,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487838339] [2021-06-12 15:33:47,017 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 15:33:47,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:33:47,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:47,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:47,282 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 15:33:47,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487838339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:47,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:47,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:47,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13442739] [2021-06-12 15:33:47,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:47,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:47,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:47,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:47,283 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:33:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:47,885 INFO L93 Difference]: Finished difference Result 7421 states and 19297 transitions. [2021-06-12 15:33:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:33:47,885 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 15:33:47,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:47,892 INFO L225 Difference]: With dead ends: 7421 [2021-06-12 15:33:47,892 INFO L226 Difference]: Without dead ends: 7151 [2021-06-12 15:33:47,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 766.9ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:33:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-12 15:33:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5278. [2021-06-12 15:33:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:47,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:33:47,944 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:33:47,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:47,944 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:33:47,944 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 15:33:47,944 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:33:47,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:47,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:47,948 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 15:33:48,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-12 15:33:48,148 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:48,149 INFO L82 PathProgramCache]: Analyzing trace with hash -771917368, now seen corresponding path program 324 times [2021-06-12 15:33:48,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:48,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403068184] [2021-06-12 15:33:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:48,525 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 15:33:48,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:48,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403068184] [2021-06-12 15:33:48,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403068184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:48,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764925536] [2021-06-12 15:33:48,525 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 15:33:48,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:33:48,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:48,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:48,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:48,822 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 15:33:48,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764925536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:48,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:48,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:48,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521129212] [2021-06-12 15:33:48,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:48,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:48,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:48,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:48,823 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:33:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:49,526 INFO L93 Difference]: Finished difference Result 7371 states and 19197 transitions. [2021-06-12 15:33:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:33:49,526 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 15:33:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:49,534 INFO L225 Difference]: With dead ends: 7371 [2021-06-12 15:33:49,534 INFO L226 Difference]: Without dead ends: 7101 [2021-06-12 15:33:49,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 880.8ms TimeCoverageRelationStatistics Valid=1074, Invalid=3216, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:33:49,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-06-12 15:33:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5278. [2021-06-12 15:33:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:33:49,588 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:33:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:49,588 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:33:49,588 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 15:33:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:33:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:49,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:49,592 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 15:33:49,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:49,792 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1630840534, now seen corresponding path program 325 times [2021-06-12 15:33:49,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:49,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332161141] [2021-06-12 15:33:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:50,137 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 15:33:50,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:50,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332161141] [2021-06-12 15:33:50,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332161141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:50,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748513651] [2021-06-12 15:33:50,138 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 15:33:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:50,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:50,402 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 15:33:50,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748513651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:50,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:50,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:50,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049285268] [2021-06-12 15:33:50,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:50,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:50,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:50,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:50,403 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:33:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:51,049 INFO L93 Difference]: Finished difference Result 7321 states and 19097 transitions. [2021-06-12 15:33:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:33:51,050 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 15:33:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:51,057 INFO L225 Difference]: With dead ends: 7321 [2021-06-12 15:33:51,057 INFO L226 Difference]: Without dead ends: 7051 [2021-06-12 15:33:51,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 790.5ms TimeCoverageRelationStatistics Valid=1002, Invalid=3030, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:33:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-06-12 15:33:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5278. [2021-06-12 15:33:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:33:51,111 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:33:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:51,111 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:33:51,111 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 15:33:51,112 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:33:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:51,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:51,115 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 15:33:51,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-12 15:33:51,316 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash -822779962, now seen corresponding path program 326 times [2021-06-12 15:33:51,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:51,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634353992] [2021-06-12 15:33:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:51,648 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 15:33:51,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:51,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634353992] [2021-06-12 15:33:51,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634353992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:51,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699420305] [2021-06-12 15:33:51,648 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 15:33:51,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:33:51,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:51,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:51,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:51,956 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 15:33:51,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699420305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:51,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:51,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:51,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384597629] [2021-06-12 15:33:51,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:51,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:51,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:51,957 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:33:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:52,752 INFO L93 Difference]: Finished difference Result 7271 states and 18997 transitions. [2021-06-12 15:33:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:33:52,753 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 15:33:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:52,760 INFO L225 Difference]: With dead ends: 7271 [2021-06-12 15:33:52,760 INFO L226 Difference]: Without dead ends: 7001 [2021-06-12 15:33:52,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 886.8ms TimeCoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:33:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-12 15:33:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5278. [2021-06-12 15:33:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:33:52,815 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:33:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:52,815 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:33:52,815 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 15:33:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:33:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:52,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:52,819 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 15:33:53,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-12 15:33:53,019 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:53,020 INFO L82 PathProgramCache]: Analyzing trace with hash 58779220, now seen corresponding path program 327 times [2021-06-12 15:33:53,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:53,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999586319] [2021-06-12 15:33:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:53,335 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 15:33:53,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:53,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999586319] [2021-06-12 15:33:53,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999586319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:53,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124118094] [2021-06-12 15:33:53,336 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 15:33:53,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:33:53,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:53,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:53,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:53,634 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 15:33:53,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124118094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:53,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:53,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:53,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196951347] [2021-06-12 15:33:53,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:53,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:53,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:53,635 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:33:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:54,358 INFO L93 Difference]: Finished difference Result 7221 states and 18897 transitions. [2021-06-12 15:33:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:33:54,359 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 15:33:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:54,365 INFO L225 Difference]: With dead ends: 7221 [2021-06-12 15:33:54,366 INFO L226 Difference]: Without dead ends: 6951 [2021-06-12 15:33:54,366 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:33:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-12 15:33:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5278. [2021-06-12 15:33:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:33:54,416 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:33:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:54,416 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:33:54,416 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 15:33:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:33:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:54,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:54,420 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 15:33:54,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-12 15:33:54,620 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:54,621 INFO L82 PathProgramCache]: Analyzing trace with hash -583595196, now seen corresponding path program 328 times [2021-06-12 15:33:54,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:54,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795372281] [2021-06-12 15:33:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:54,941 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 15:33:54,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:54,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795372281] [2021-06-12 15:33:54,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795372281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:54,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959223642] [2021-06-12 15:33:54,942 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 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 15:33:55,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:33:55,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:55,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:55,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:55,246 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 15:33:55,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959223642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:55,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:55,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:55,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369837587] [2021-06-12 15:33:55,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:55,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:55,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:55,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:55,247 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:33:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:56,103 INFO L93 Difference]: Finished difference Result 7171 states and 18797 transitions. [2021-06-12 15:33:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:33:56,104 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 15:33:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:56,111 INFO L225 Difference]: With dead ends: 7171 [2021-06-12 15:33:56,111 INFO L226 Difference]: Without dead ends: 6901 [2021-06-12 15:33:56,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 925.2ms TimeCoverageRelationStatistics Valid=1136, Invalid=3694, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:33:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-06-12 15:33:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5278. [2021-06-12 15:33:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:33:56,164 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:33:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:56,164 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:33:56,164 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 15:33:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:33:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:56,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:56,168 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 15:33:56,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-12 15:33:56,368 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:56,369 INFO L82 PathProgramCache]: Analyzing trace with hash -630142126, now seen corresponding path program 329 times [2021-06-12 15:33:56,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:56,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108116254] [2021-06-12 15:33:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:56,694 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 15:33:56,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:56,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108116254] [2021-06-12 15:33:56,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108116254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:56,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260239857] [2021-06-12 15:33:56,695 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 15:33:56,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:33:56,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:56,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:56,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:56,961 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 15:33:56,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260239857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:56,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:56,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:33:56,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430603833] [2021-06-12 15:33:56,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:33:56,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:56,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:33:56,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:33:56,962 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:33:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:57,738 INFO L93 Difference]: Finished difference Result 7121 states and 18697 transitions. [2021-06-12 15:33:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:33:57,739 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 15:33:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:57,747 INFO L225 Difference]: With dead ends: 7121 [2021-06-12 15:33:57,747 INFO L226 Difference]: Without dead ends: 6851 [2021-06-12 15:33:57,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 842.1ms TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:33:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2021-06-12 15:33:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 5278. [2021-06-12 15:33:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:33:57,800 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:33:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:57,800 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:33:57,800 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 15:33:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:33:57,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:57,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:57,804 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 15:33:58,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-12 15:33:58,005 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:58,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1548526526, now seen corresponding path program 330 times [2021-06-12 15:33:58,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:58,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290770650] [2021-06-12 15:33:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:33:58,351 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 15:33:58,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:33:58,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290770650] [2021-06-12 15:33:58,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290770650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:58,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124988388] [2021-06-12 15:33:58,351 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 15:33:58,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:33:58,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:33:58,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:33:58,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:33:58,647 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 15:33:58,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124988388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:33:58,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:33:58,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:33:58,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925275822] [2021-06-12 15:33:58,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:33:58,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:33:58,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:33:58,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:33:58,648 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:33:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:33:59,592 INFO L93 Difference]: Finished difference Result 7071 states and 18597 transitions. [2021-06-12 15:33:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:33:59,592 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 15:33:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:33:59,600 INFO L225 Difference]: With dead ends: 7071 [2021-06-12 15:33:59,600 INFO L226 Difference]: Without dead ends: 6801 [2021-06-12 15:33:59,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1009.6ms TimeCoverageRelationStatistics Valid=1191, Invalid=3921, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:33:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-06-12 15:33:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 5278. [2021-06-12 15:33:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:33:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:33:59,651 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:33:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:33:59,651 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:33:59,651 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 15:33:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:33:59,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:33:59,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:33:59,655 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 15:33:59,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:33:59,856 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:33:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:33:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash 969749968, now seen corresponding path program 331 times [2021-06-12 15:33:59,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:33:59,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931919631] [2021-06-12 15:33:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:33:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:00,175 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 15:34:00,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:00,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931919631] [2021-06-12 15:34:00,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931919631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:00,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686403670] [2021-06-12 15:34:00,175 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 15:34:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:00,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:00,438 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 15:34:00,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686403670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:00,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:00,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:00,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78162787] [2021-06-12 15:34:00,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:00,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:00,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:00,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:00,439 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:01,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:01,251 INFO L93 Difference]: Finished difference Result 7021 states and 18497 transitions. [2021-06-12 15:34:01,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:34:01,252 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 15:34:01,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:01,259 INFO L225 Difference]: With dead ends: 7021 [2021-06-12 15:34:01,259 INFO L226 Difference]: Without dead ends: 6751 [2021-06-12 15:34:01,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 869.4ms TimeCoverageRelationStatistics Valid=1143, Invalid=3687, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:34:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-06-12 15:34:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 5278. [2021-06-12 15:34:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:01,311 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:01,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:01,311 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:01,311 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 15:34:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:01,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:01,315 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 15:34:01,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:01,515 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:01,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1225575744, now seen corresponding path program 332 times [2021-06-12 15:34:01,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:01,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803951051] [2021-06-12 15:34:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:01,843 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 15:34:01,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:01,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803951051] [2021-06-12 15:34:01,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803951051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:01,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737991423] [2021-06-12 15:34:01,844 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 15:34:01,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:01,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:01,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:02,120 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 15:34:02,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737991423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:02,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:02,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:02,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382884034] [2021-06-12 15:34:02,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:02,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:02,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:02,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:02,122 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:03,117 INFO L93 Difference]: Finished difference Result 6971 states and 18397 transitions. [2021-06-12 15:34:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:34:03,117 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 15:34:03,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:03,124 INFO L225 Difference]: With dead ends: 6971 [2021-06-12 15:34:03,124 INFO L226 Difference]: Without dead ends: 6701 [2021-06-12 15:34:03,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1042.3ms TimeCoverageRelationStatistics Valid=1262, Invalid=4140, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:34:03,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2021-06-12 15:34:03,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 5278. [2021-06-12 15:34:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:03,176 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:03,176 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:03,176 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 15:34:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:03,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:03,180 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 15:34:03,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:03,381 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:03,381 INFO L82 PathProgramCache]: Analyzing trace with hash 284624334, now seen corresponding path program 333 times [2021-06-12 15:34:03,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:03,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713299243] [2021-06-12 15:34:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:03,706 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 15:34:03,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:03,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713299243] [2021-06-12 15:34:03,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713299243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:03,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251915223] [2021-06-12 15:34:03,706 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 15:34:03,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:03,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:03,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:03,977 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 15:34:03,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251915223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:03,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:03,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:03,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963645297] [2021-06-12 15:34:03,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:03,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:03,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:03,978 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:04,848 INFO L93 Difference]: Finished difference Result 6921 states and 18297 transitions. [2021-06-12 15:34:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:34:04,848 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 15:34:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:04,856 INFO L225 Difference]: With dead ends: 6921 [2021-06-12 15:34:04,856 INFO L226 Difference]: Without dead ends: 6651 [2021-06-12 15:34:04,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 892.9ms TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:34:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-12 15:34:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 5278. [2021-06-12 15:34:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:04,906 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:04,906 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:04,906 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 15:34:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:04,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:04,936 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 15:34:05,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:05,136 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash 924282558, now seen corresponding path program 334 times [2021-06-12 15:34:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:05,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241805933] [2021-06-12 15:34:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:05,433 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 15:34:05,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:05,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241805933] [2021-06-12 15:34:05,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241805933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:05,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284064922] [2021-06-12 15:34:05,434 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 15:34:05,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:05,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:05,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:05,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:05,714 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 15:34:05,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284064922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:05,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:05,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:05,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34706997] [2021-06-12 15:34:05,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:05,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:05,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:05,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:05,715 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:06,790 INFO L93 Difference]: Finished difference Result 6871 states and 18197 transitions. [2021-06-12 15:34:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:34:06,790 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 15:34:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:06,796 INFO L225 Difference]: With dead ends: 6871 [2021-06-12 15:34:06,796 INFO L226 Difference]: Without dead ends: 6601 [2021-06-12 15:34:06,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1087.0ms TimeCoverageRelationStatistics Valid=1349, Invalid=4351, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:34:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-12 15:34:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 5278. [2021-06-12 15:34:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:06,844 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:06,844 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:06,844 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 15:34:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:06,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:06,848 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 15:34:07,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-12 15:34:07,049 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash 149363532, now seen corresponding path program 335 times [2021-06-12 15:34:07,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:07,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080965332] [2021-06-12 15:34:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:07,347 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 15:34:07,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:07,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080965332] [2021-06-12 15:34:07,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080965332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:07,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146652053] [2021-06-12 15:34:07,347 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 15:34:07,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:07,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:07,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:07,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:07,607 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 15:34:07,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146652053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:07,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:07,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:07,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379634085] [2021-06-12 15:34:07,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:07,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:07,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:07,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:07,608 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:08,542 INFO L93 Difference]: Finished difference Result 6821 states and 18097 transitions. [2021-06-12 15:34:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:34:08,542 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 15:34:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:08,548 INFO L225 Difference]: With dead ends: 6821 [2021-06-12 15:34:08,549 INFO L226 Difference]: Without dead ends: 6551 [2021-06-12 15:34:08,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 937.5ms TimeCoverageRelationStatistics Valid=1317, Invalid=4085, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:34:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-06-12 15:34:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 5278. [2021-06-12 15:34:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:08,601 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:08,601 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:08,601 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 15:34:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:08,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:08,605 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 15:34:08,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-12 15:34:08,806 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:08,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:08,806 INFO L82 PathProgramCache]: Analyzing trace with hash -304549828, now seen corresponding path program 336 times [2021-06-12 15:34:08,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:08,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233875885] [2021-06-12 15:34:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:09,091 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 15:34:09,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:09,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233875885] [2021-06-12 15:34:09,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233875885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:09,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037819569] [2021-06-12 15:34:09,091 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 15:34:09,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:34:09,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:09,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:09,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:09,377 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 15:34:09,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037819569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:09,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:09,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:09,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293185654] [2021-06-12 15:34:09,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:09,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:09,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:09,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:09,378 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:10,493 INFO L93 Difference]: Finished difference Result 6771 states and 17997 transitions. [2021-06-12 15:34:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:34:10,493 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 15:34:10,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:10,499 INFO L225 Difference]: With dead ends: 6771 [2021-06-12 15:34:10,499 INFO L226 Difference]: Without dead ends: 6501 [2021-06-12 15:34:10,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1132.3ms TimeCoverageRelationStatistics Valid=1452, Invalid=4554, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:34:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-06-12 15:34:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 5278. [2021-06-12 15:34:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:10,553 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:10,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:10,553 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:10,553 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 15:34:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:10,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:10,558 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 15:34:10,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-12 15:34:10,758 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash 573462090, now seen corresponding path program 337 times [2021-06-12 15:34:10,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:10,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349884147] [2021-06-12 15:34:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:11,041 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 15:34:11,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:11,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349884147] [2021-06-12 15:34:11,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349884147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:11,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596391172] [2021-06-12 15:34:11,042 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 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 15:34:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:11,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:11,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:11,300 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 15:34:11,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596391172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:11,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:11,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:11,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278100352] [2021-06-12 15:34:11,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:11,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:11,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:11,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:11,301 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:12,272 INFO L93 Difference]: Finished difference Result 6721 states and 17897 transitions. [2021-06-12 15:34:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:34:12,272 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 15:34:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:12,278 INFO L225 Difference]: With dead ends: 6721 [2021-06-12 15:34:12,278 INFO L226 Difference]: Without dead ends: 6451 [2021-06-12 15:34:12,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 951.2ms TimeCoverageRelationStatistics Valid=1428, Invalid=4272, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:34:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-12 15:34:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 5278. [2021-06-12 15:34:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:12,333 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:12,333 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:12,333 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 15:34:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:12,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:12,337 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 15:34:12,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-12 15:34:12,538 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:12,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:12,538 INFO L82 PathProgramCache]: Analyzing trace with hash -326592710, now seen corresponding path program 338 times [2021-06-12 15:34:12,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:12,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59359468] [2021-06-12 15:34:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:12,826 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 15:34:12,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59359468] [2021-06-12 15:34:12,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59359468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:12,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399596525] [2021-06-12 15:34:12,827 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 15:34:12,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:12,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:12,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:13,100 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 15:34:13,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399596525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:13,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:13,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:13,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125918296] [2021-06-12 15:34:13,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:13,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:13,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:13,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:13,101 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:14,305 INFO L93 Difference]: Finished difference Result 6671 states and 17797 transitions. [2021-06-12 15:34:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:34:14,305 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 15:34:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:14,311 INFO L225 Difference]: With dead ends: 6671 [2021-06-12 15:34:14,311 INFO L226 Difference]: Without dead ends: 6401 [2021-06-12 15:34:14,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1184.6ms TimeCoverageRelationStatistics Valid=1571, Invalid=4749, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:34:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6401 states. [2021-06-12 15:34:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6401 to 5278. [2021-06-12 15:34:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:14,360 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:14,361 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:14,361 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 15:34:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:14,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:14,365 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 15:34:14,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:14,565 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:14,565 INFO L82 PathProgramCache]: Analyzing trace with hash -755657016, now seen corresponding path program 339 times [2021-06-12 15:34:14,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:14,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914877537] [2021-06-12 15:34:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:14,851 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 15:34:14,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:14,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914877537] [2021-06-12 15:34:14,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914877537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:14,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822661861] [2021-06-12 15:34:14,852 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 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 15:34:14,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:14,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:14,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:15,116 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 15:34:15,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822661861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:15,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:15,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:15,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11429853] [2021-06-12 15:34:15,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:15,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:15,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:15,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:15,117 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:16,102 INFO L93 Difference]: Finished difference Result 6621 states and 17697 transitions. [2021-06-12 15:34:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:34:16,103 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 15:34:16,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:16,108 INFO L225 Difference]: With dead ends: 6621 [2021-06-12 15:34:16,108 INFO L226 Difference]: Without dead ends: 6351 [2021-06-12 15:34:16,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 992.9ms TimeCoverageRelationStatistics Valid=1555, Invalid=4451, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:34:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-06-12 15:34:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 5278. [2021-06-12 15:34:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:16,156 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:16,156 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:16,156 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 15:34:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:16,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:16,160 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 15:34:16,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-12 15:34:16,360 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:16,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:16,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1441840200, now seen corresponding path program 340 times [2021-06-12 15:34:16,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:16,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369718413] [2021-06-12 15:34:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:16,647 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 15:34:16,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:16,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369718413] [2021-06-12 15:34:16,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369718413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:16,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571859435] [2021-06-12 15:34:16,647 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 15:34:16,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:16,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:16,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:16,922 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 15:34:16,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571859435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:16,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:16,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:16,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660942176] [2021-06-12 15:34:16,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:16,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:16,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:16,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:16,923 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:18,215 INFO L93 Difference]: Finished difference Result 6571 states and 17597 transitions. [2021-06-12 15:34:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:34:18,216 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 15:34:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:18,222 INFO L225 Difference]: With dead ends: 6571 [2021-06-12 15:34:18,222 INFO L226 Difference]: Without dead ends: 6301 [2021-06-12 15:34:18,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1225.8ms TimeCoverageRelationStatistics Valid=1706, Invalid=4936, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:34:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2021-06-12 15:34:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 5278. [2021-06-12 15:34:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:18,271 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:18,271 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:18,271 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 15:34:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:18,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:18,275 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 15:34:18,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:18,475 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:18,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1526874938, now seen corresponding path program 341 times [2021-06-12 15:34:18,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:18,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646273605] [2021-06-12 15:34:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:18,748 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 15:34:18,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:18,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646273605] [2021-06-12 15:34:18,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646273605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:18,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127122514] [2021-06-12 15:34:18,749 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 15:34:18,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:18,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:18,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:18,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:19,048 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 15:34:19,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127122514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:19,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:19,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:19,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126997652] [2021-06-12 15:34:19,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:19,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:19,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:19,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:19,049 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:20,132 INFO L93 Difference]: Finished difference Result 6521 states and 17497 transitions. [2021-06-12 15:34:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:34:20,132 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 15:34:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:20,138 INFO L225 Difference]: With dead ends: 6521 [2021-06-12 15:34:20,138 INFO L226 Difference]: Without dead ends: 6251 [2021-06-12 15:34:20,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1005.2ms TimeCoverageRelationStatistics Valid=1698, Invalid=4622, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:34:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2021-06-12 15:34:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 5278. [2021-06-12 15:34:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:20,187 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:20,187 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:20,187 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 15:34:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:20,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:20,191 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 15:34:20,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-12 15:34:20,391 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:20,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:20,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1595025994, now seen corresponding path program 342 times [2021-06-12 15:34:20,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:20,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134645832] [2021-06-12 15:34:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:20,709 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 15:34:20,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:20,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134645832] [2021-06-12 15:34:20,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134645832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:20,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656479945] [2021-06-12 15:34:20,710 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 15:34:20,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:34:20,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:20,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:20,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:20,988 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 15:34:20,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656479945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:20,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:20,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:20,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062524190] [2021-06-12 15:34:20,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:20,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:20,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:20,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:20,989 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:22,310 INFO L93 Difference]: Finished difference Result 6471 states and 17397 transitions. [2021-06-12 15:34:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:34:22,310 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 15:34:22,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:22,316 INFO L225 Difference]: With dead ends: 6471 [2021-06-12 15:34:22,316 INFO L226 Difference]: Without dead ends: 6201 [2021-06-12 15:34:22,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1296.6ms TimeCoverageRelationStatistics Valid=1857, Invalid=5115, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:34:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2021-06-12 15:34:22,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 5278. [2021-06-12 15:34:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:22,383 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:22,383 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:22,383 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 15:34:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:22,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:22,387 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 15:34:22,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:22,588 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1402972228, now seen corresponding path program 343 times [2021-06-12 15:34:22,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:22,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222689054] [2021-06-12 15:34:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:22,866 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 15:34:22,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:22,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222689054] [2021-06-12 15:34:22,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222689054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:22,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218046735] [2021-06-12 15:34:22,867 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 15:34:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:22,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:22,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:23,132 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 15:34:23,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218046735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:23,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:23,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:23,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140655717] [2021-06-12 15:34:23,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:23,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:23,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:23,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:23,133 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:24,266 INFO L93 Difference]: Finished difference Result 6421 states and 17297 transitions. [2021-06-12 15:34:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:34:24,267 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 15:34:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:24,271 INFO L225 Difference]: With dead ends: 6421 [2021-06-12 15:34:24,271 INFO L226 Difference]: Without dead ends: 6151 [2021-06-12 15:34:24,272 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 1080.3ms TimeCoverageRelationStatistics Valid=1857, Invalid=4785, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:34:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-06-12 15:34:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 5278. [2021-06-12 15:34:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:34:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-12 15:34:24,317 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-12 15:34:24,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:24,317 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-12 15:34:24,317 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 15:34:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-12 15:34:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:24,321 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:24,321 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 15:34:24,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:24,522 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:24,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:24,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1832725812, now seen corresponding path program 344 times [2021-06-12 15:34:24,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:24,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773712559] [2021-06-12 15:34:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:24,802 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 15:34:24,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:24,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773712559] [2021-06-12 15:34:24,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773712559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:24,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930819903] [2021-06-12 15:34:24,802 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 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 15:34:24,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:24,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:24,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:24,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:25,060 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 15:34:25,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930819903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:25,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:25,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:25,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639846814] [2021-06-12 15:34:25,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:25,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:25,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:25,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:25,061 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 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 15:34:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:26,514 INFO L93 Difference]: Finished difference Result 6879 states and 18563 transitions. [2021-06-12 15:34:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:34:26,514 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 15:34:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:26,520 INFO L225 Difference]: With dead ends: 6879 [2021-06-12 15:34:26,520 INFO L226 Difference]: Without dead ends: 6256 [2021-06-12 15:34:26,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 1369.6ms TimeCoverageRelationStatistics Valid=2045, Invalid=5611, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:34:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-06-12 15:34:26,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 5188. [2021-06-12 15:34:26,568 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 15:34:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 14648 transitions. [2021-06-12 15:34:26,574 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 14648 transitions. Word has length 160 [2021-06-12 15:34:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:26,574 INFO L482 AbstractCegarLoop]: Abstraction has 5188 states and 14648 transitions. [2021-06-12 15:34:26,574 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 15:34:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 14648 transitions. [2021-06-12 15:34:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:26,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:26,578 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 15:34:26,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:26,778 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:26,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:26,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1774991682, now seen corresponding path program 345 times [2021-06-12 15:34:26,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:26,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930971853] [2021-06-12 15:34:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:27,057 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 15:34:27,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:27,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930971853] [2021-06-12 15:34:27,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930971853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:27,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540481960] [2021-06-12 15:34:27,057 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 15:34:27,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:27,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:27,316 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 15:34:27,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540481960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:27,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:27,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-12 15:34:27,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257395611] [2021-06-12 15:34:27,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 15:34:27,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:27,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 15:34:27,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:34:27,317 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 15:34:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:28,453 INFO L93 Difference]: Finished difference Result 7108 states and 19281 transitions. [2021-06-12 15:34:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:34:28,453 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 15:34:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:28,460 INFO L225 Difference]: With dead ends: 7108 [2021-06-12 15:34:28,460 INFO L226 Difference]: Without dead ends: 6838 [2021-06-12 15:34:28,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1101.2ms TimeCoverageRelationStatistics Valid=2033, Invalid=4939, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:34:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2021-06-12 15:34:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 5368. [2021-06-12 15:34:28,508 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 15:34:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15207 transitions. [2021-06-12 15:34:28,514 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15207 transitions. Word has length 160 [2021-06-12 15:34:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:28,515 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15207 transitions. [2021-06-12 15:34:28,515 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 15:34:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15207 transitions. [2021-06-12 15:34:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-12 15:34:28,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:28,518 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 15:34:28,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-12 15:34:28,719 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:28,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1797334932, now seen corresponding path program 346 times [2021-06-12 15:34:28,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:28,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266075678] [2021-06-12 15:34:28,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:28,999 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 15:34:28,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:28,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266075678] [2021-06-12 15:34:28,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266075678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:28,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915643360] [2021-06-12 15:34:28,999 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 15:34:29,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:29,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:29,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 15:34:29,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:29,289 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 15:34:29,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915643360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:29,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:29,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-12 15:34:29,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581400746] [2021-06-12 15:34:29,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:29,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:29,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:29,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:29,290 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 15:34:30,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:30,697 INFO L93 Difference]: Finished difference Result 6595 states and 17981 transitions. [2021-06-12 15:34:30,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:34:30,697 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 15:34:30,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:30,703 INFO L225 Difference]: With dead ends: 6595 [2021-06-12 15:34:30,703 INFO L226 Difference]: Without dead ends: 6106 [2021-06-12 15:34:30,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 1367.0ms TimeCoverageRelationStatistics Valid=2210, Invalid=5446, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:34:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-06-12 15:34:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 3513. [2021-06-12 15:34:30,738 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 15:34:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9628 transitions. [2021-06-12 15:34:30,742 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9628 transitions. Word has length 160 [2021-06-12 15:34:30,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:30,742 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9628 transitions. [2021-06-12 15:34:30,742 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 15:34:30,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9628 transitions. [2021-06-12 15:34:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:30,745 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:30,745 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 15:34:30,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-12 15:34:30,946 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:30,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1274170069, now seen corresponding path program 347 times [2021-06-12 15:34:30,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:30,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157730157] [2021-06-12 15:34:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:31,341 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 15:34:31,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:31,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157730157] [2021-06-12 15:34:31,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157730157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:31,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584438596] [2021-06-12 15:34:31,341 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 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 15:34:31,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:31,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:31,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:31,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:31,613 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 15:34:31,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584438596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:31,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:31,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:31,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58999630] [2021-06-12 15:34:31,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:31,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:31,614 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 15:34:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:32,290 INFO L93 Difference]: Finished difference Result 5231 states and 13267 transitions. [2021-06-12 15:34:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:34:32,290 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 15:34:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:32,295 INFO L225 Difference]: With dead ends: 5231 [2021-06-12 15:34:32,295 INFO L226 Difference]: Without dead ends: 4961 [2021-06-12 15:34:32,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 815.7ms TimeCoverageRelationStatistics Valid=1074, Invalid=2958, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:34:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-12 15:34:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3588. [2021-06-12 15:34:32,325 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 15:34:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9853 transitions. [2021-06-12 15:34:32,328 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9853 transitions. Word has length 165 [2021-06-12 15:34:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:32,328 INFO L482 AbstractCegarLoop]: Abstraction has 3588 states and 9853 transitions. [2021-06-12 15:34:32,329 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 15:34:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9853 transitions. [2021-06-12 15:34:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:32,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:32,331 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 15:34:32,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-12 15:34:32,534 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:32,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:32,534 INFO L82 PathProgramCache]: Analyzing trace with hash -2119657957, now seen corresponding path program 348 times [2021-06-12 15:34:32,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:32,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879586891] [2021-06-12 15:34:32,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:32,924 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 15:34:32,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:32,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879586891] [2021-06-12 15:34:32,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879586891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:32,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238296480] [2021-06-12 15:34:32,924 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 15:34:33,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:34:33,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:33,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:33,221 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 15:34:33,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238296480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:33,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:33,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:33,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148064968] [2021-06-12 15:34:33,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:33,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:33,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:33,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:33,222 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 15:34:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:33,918 INFO L93 Difference]: Finished difference Result 5901 states and 14682 transitions. [2021-06-12 15:34:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:34:33,918 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 15:34:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:33,923 INFO L225 Difference]: With dead ends: 5901 [2021-06-12 15:34:33,923 INFO L226 Difference]: Without dead ends: 5631 [2021-06-12 15:34:33,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 886.6ms TimeCoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:34:33,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-06-12 15:34:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 3663. [2021-06-12 15:34:33,956 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 15:34:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10078 transitions. [2021-06-12 15:34:33,960 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10078 transitions. Word has length 165 [2021-06-12 15:34:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:33,960 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10078 transitions. [2021-06-12 15:34:33,960 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 15:34:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10078 transitions. [2021-06-12 15:34:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:33,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:33,963 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 15:34:34,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:34,163 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash 269306281, now seen corresponding path program 349 times [2021-06-12 15:34:34,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:34,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181980963] [2021-06-12 15:34:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:34,535 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 15:34:34,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:34,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181980963] [2021-06-12 15:34:34,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181980963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:34,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75584005] [2021-06-12 15:34:34,536 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 15:34:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:34,807 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 15:34:34,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75584005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:34,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:34,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:34,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980654546] [2021-06-12 15:34:34,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:34,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:34,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:34,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:34,808 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 15:34:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:35,448 INFO L93 Difference]: Finished difference Result 5931 states and 14817 transitions. [2021-06-12 15:34:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:34:35,448 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 15:34:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:35,454 INFO L225 Difference]: With dead ends: 5931 [2021-06-12 15:34:35,454 INFO L226 Difference]: Without dead ends: 5661 [2021-06-12 15:34:35,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=1131, Invalid=3291, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:34:35,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-12 15:34:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 3738. [2021-06-12 15:34:35,490 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 15:34:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10303 transitions. [2021-06-12 15:34:35,494 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10303 transitions. Word has length 165 [2021-06-12 15:34:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:35,494 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10303 transitions. [2021-06-12 15:34:35,494 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 15:34:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10303 transitions. [2021-06-12 15:34:35,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:35,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:35,497 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 15:34:35,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-12 15:34:35,698 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:35,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1152358041, now seen corresponding path program 350 times [2021-06-12 15:34:35,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:35,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65708110] [2021-06-12 15:34:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:36,055 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 15:34:36,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:36,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65708110] [2021-06-12 15:34:36,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65708110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:36,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924574396] [2021-06-12 15:34:36,055 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 15:34:36,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:36,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:36,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:36,366 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 15:34:36,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924574396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:36,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:36,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:36,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555435845] [2021-06-12 15:34:36,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:36,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:36,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:36,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:36,367 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 15:34:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:37,162 INFO L93 Difference]: Finished difference Result 5956 states and 14942 transitions. [2021-06-12 15:34:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:34:37,162 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 15:34:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:37,167 INFO L225 Difference]: With dead ends: 5956 [2021-06-12 15:34:37,167 INFO L226 Difference]: Without dead ends: 5686 [2021-06-12 15:34:37,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 894.3ms TimeCoverageRelationStatistics Valid=1153, Invalid=3539, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:34:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-12 15:34:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3813. [2021-06-12 15:34:37,204 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 15:34:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10528 transitions. [2021-06-12 15:34:37,208 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10528 transitions. Word has length 165 [2021-06-12 15:34:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:37,209 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10528 transitions. [2021-06-12 15:34:37,209 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 15:34:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10528 transitions. [2021-06-12 15:34:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:37,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:37,212 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 15:34:37,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:37,412 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -739851353, now seen corresponding path program 351 times [2021-06-12 15:34:37,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:37,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498384563] [2021-06-12 15:34:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:37,760 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 15:34:37,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:37,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498384563] [2021-06-12 15:34:37,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498384563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:37,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013854332] [2021-06-12 15:34:37,761 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 15:34:37,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:37,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:38,064 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 15:34:38,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013854332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:38,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:38,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:38,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690692678] [2021-06-12 15:34:38,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:38,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:38,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:38,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:38,065 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 15:34:38,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:38,798 INFO L93 Difference]: Finished difference Result 5981 states and 15067 transitions. [2021-06-12 15:34:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:34:38,799 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 15:34:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:38,804 INFO L225 Difference]: With dead ends: 5981 [2021-06-12 15:34:38,804 INFO L226 Difference]: Without dead ends: 5711 [2021-06-12 15:34:38,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 831.6ms TimeCoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:34:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-12 15:34:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 3888. [2021-06-12 15:34:38,838 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 15:34:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10753 transitions. [2021-06-12 15:34:38,843 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10753 transitions. Word has length 165 [2021-06-12 15:34:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:38,843 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10753 transitions. [2021-06-12 15:34:38,843 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 15:34:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10753 transitions. [2021-06-12 15:34:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:38,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:38,846 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 15:34:39,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-12 15:34:39,046 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:39,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1101495447, now seen corresponding path program 352 times [2021-06-12 15:34:39,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:39,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924512893] [2021-06-12 15:34:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:39,393 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 15:34:39,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:39,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924512893] [2021-06-12 15:34:39,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924512893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:39,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674240208] [2021-06-12 15:34:39,394 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 15:34:39,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:39,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:39,708 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 15:34:39,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674240208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:39,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:39,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:39,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945740429] [2021-06-12 15:34:39,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:39,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:39,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:39,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:39,709 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 15:34:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:40,563 INFO L93 Difference]: Finished difference Result 6006 states and 15192 transitions. [2021-06-12 15:34:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:34:40,563 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 15:34:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:40,568 INFO L225 Difference]: With dead ends: 6006 [2021-06-12 15:34:40,568 INFO L226 Difference]: Without dead ends: 5736 [2021-06-12 15:34:40,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 934.7ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:34:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-12 15:34:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 3963. [2021-06-12 15:34:40,605 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 15:34:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10978 transitions. [2021-06-12 15:34:40,609 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10978 transitions. Word has length 165 [2021-06-12 15:34:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:40,609 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10978 transitions. [2021-06-12 15:34:40,609 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 15:34:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10978 transitions. [2021-06-12 15:34:40,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:40,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:40,612 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 15:34:40,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:40,813 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1983054629, now seen corresponding path program 353 times [2021-06-12 15:34:40,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:40,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222022195] [2021-06-12 15:34:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:41,175 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 15:34:41,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:41,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222022195] [2021-06-12 15:34:41,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222022195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:41,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399233963] [2021-06-12 15:34:41,176 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 15:34:41,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:41,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:41,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:41,469 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 15:34:41,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399233963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:41,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:41,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:41,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798919432] [2021-06-12 15:34:41,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:41,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:41,470 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 15:34:42,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:42,250 INFO L93 Difference]: Finished difference Result 6031 states and 15317 transitions. [2021-06-12 15:34:42,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:34:42,251 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 15:34:42,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:42,256 INFO L225 Difference]: With dead ends: 6031 [2021-06-12 15:34:42,256 INFO L226 Difference]: Without dead ends: 5761 [2021-06-12 15:34:42,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 882.1ms TimeCoverageRelationStatistics Valid=1203, Invalid=3767, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:34:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-12 15:34:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4038. [2021-06-12 15:34:42,295 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 15:34:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11203 transitions. [2021-06-12 15:34:42,299 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11203 transitions. Word has length 165 [2021-06-12 15:34:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:42,299 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11203 transitions. [2021-06-12 15:34:42,299 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 15:34:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11203 transitions. [2021-06-12 15:34:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:42,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:42,302 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 15:34:42,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:42,502 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1340680213, now seen corresponding path program 354 times [2021-06-12 15:34:42,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:42,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686181407] [2021-06-12 15:34:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:42,838 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 15:34:42,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:42,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686181407] [2021-06-12 15:34:42,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686181407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:42,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407556872] [2021-06-12 15:34:42,839 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 15:34:42,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:34:42,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:42,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:42,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:43,182 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 15:34:43,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407556872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:43,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:43,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:43,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118250629] [2021-06-12 15:34:43,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:43,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:43,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:43,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:43,183 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 15:34:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:44,085 INFO L93 Difference]: Finished difference Result 6056 states and 15442 transitions. [2021-06-12 15:34:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:34:44,085 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 15:34:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:44,091 INFO L225 Difference]: With dead ends: 6056 [2021-06-12 15:34:44,091 INFO L226 Difference]: Without dead ends: 5786 [2021-06-12 15:34:44,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 974.0ms TimeCoverageRelationStatistics Valid=1229, Invalid=4027, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:34:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-12 15:34:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4113. [2021-06-12 15:34:44,127 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 15:34:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11428 transitions. [2021-06-12 15:34:44,131 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11428 transitions. Word has length 165 [2021-06-12 15:34:44,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:44,131 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11428 transitions. [2021-06-12 15:34:44,131 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 15:34:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11428 transitions. [2021-06-12 15:34:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:44,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:44,134 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 15:34:44,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:44,335 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:44,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1294133283, now seen corresponding path program 355 times [2021-06-12 15:34:44,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:44,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155879951] [2021-06-12 15:34:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:44,653 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 15:34:44,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155879951] [2021-06-12 15:34:44,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155879951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562933135] [2021-06-12 15:34:44,653 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 15:34:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:44,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:44,939 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 15:34:44,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562933135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:44,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:44,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:44,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033192258] [2021-06-12 15:34:44,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:44,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:44,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:44,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:44,940 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 15:34:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:45,765 INFO L93 Difference]: Finished difference Result 6081 states and 15567 transitions. [2021-06-12 15:34:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:34:45,765 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 15:34:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:45,771 INFO L225 Difference]: With dead ends: 6081 [2021-06-12 15:34:45,771 INFO L226 Difference]: Without dead ends: 5811 [2021-06-12 15:34:45,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 894.6ms TimeCoverageRelationStatistics Valid=1263, Invalid=3993, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:34:45,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-06-12 15:34:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4188. [2021-06-12 15:34:45,809 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 15:34:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11653 transitions. [2021-06-12 15:34:45,813 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11653 transitions. Word has length 165 [2021-06-12 15:34:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:45,814 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11653 transitions. [2021-06-12 15:34:45,814 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 15:34:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11653 transitions. [2021-06-12 15:34:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:45,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:45,817 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 15:34:46,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-12 15:34:46,017 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash 375748883, now seen corresponding path program 356 times [2021-06-12 15:34:46,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:46,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561722221] [2021-06-12 15:34:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:46,340 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 15:34:46,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:46,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561722221] [2021-06-12 15:34:46,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561722221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:46,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726402558] [2021-06-12 15:34:46,340 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 15:34:46,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:46,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:46,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:46,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:46,646 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 15:34:46,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726402558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:46,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:46,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:46,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088464769] [2021-06-12 15:34:46,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:46,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:46,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:46,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:46,647 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 15:34:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:47,601 INFO L93 Difference]: Finished difference Result 6106 states and 15692 transitions. [2021-06-12 15:34:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:34:47,601 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 15:34:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:47,607 INFO L225 Difference]: With dead ends: 6106 [2021-06-12 15:34:47,607 INFO L226 Difference]: Without dead ends: 5836 [2021-06-12 15:34:47,608 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1011.2ms TimeCoverageRelationStatistics Valid=1291, Invalid=4259, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:34:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-12 15:34:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 4263. [2021-06-12 15:34:47,648 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 15:34:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11878 transitions. [2021-06-12 15:34:47,652 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11878 transitions. Word has length 165 [2021-06-12 15:34:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:47,653 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11878 transitions. [2021-06-12 15:34:47,653 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 15:34:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11878 transitions. [2021-06-12 15:34:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:47,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:47,656 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 15:34:47,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:47,857 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1400941919, now seen corresponding path program 357 times [2021-06-12 15:34:47,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:47,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428163926] [2021-06-12 15:34:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:48,165 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 15:34:48,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:48,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428163926] [2021-06-12 15:34:48,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428163926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:48,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202071138] [2021-06-12 15:34:48,165 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 15:34:48,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:48,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:48,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:48,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:48,478 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 15:34:48,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202071138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:48,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:48,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:48,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101328053] [2021-06-12 15:34:48,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:48,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:48,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:48,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:48,479 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 15:34:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:49,321 INFO L93 Difference]: Finished difference Result 6131 states and 15817 transitions. [2021-06-12 15:34:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:34:49,321 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 15:34:49,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:49,327 INFO L225 Difference]: With dead ends: 6131 [2021-06-12 15:34:49,327 INFO L226 Difference]: Without dead ends: 5861 [2021-06-12 15:34:49,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 911.1ms TimeCoverageRelationStatistics Valid=1339, Invalid=4211, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:34:49,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-12 15:34:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 4338. [2021-06-12 15:34:49,368 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 15:34:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12103 transitions. [2021-06-12 15:34:49,373 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12103 transitions. Word has length 165 [2021-06-12 15:34:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:49,373 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12103 transitions. [2021-06-12 15:34:49,373 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 15:34:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12103 transitions. [2021-06-12 15:34:49,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:49,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:49,376 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 15:34:49,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-12 15:34:49,577 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:49,577 INFO L82 PathProgramCache]: Analyzing trace with hash 698699665, now seen corresponding path program 358 times [2021-06-12 15:34:49,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:49,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197243338] [2021-06-12 15:34:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:49,912 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 15:34:49,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:49,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197243338] [2021-06-12 15:34:49,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197243338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:49,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832960022] [2021-06-12 15:34:49,913 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 15:34:49,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:34:49,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:49,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:50,225 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 15:34:50,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832960022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:50,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:50,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:50,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785266585] [2021-06-12 15:34:50,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:50,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:50,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:50,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:50,226 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 15:34:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:51,223 INFO L93 Difference]: Finished difference Result 6156 states and 15942 transitions. [2021-06-12 15:34:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:34:51,223 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 15:34:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:51,228 INFO L225 Difference]: With dead ends: 6156 [2021-06-12 15:34:51,228 INFO L226 Difference]: Without dead ends: 5886 [2021-06-12 15:34:51,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1080.5ms TimeCoverageRelationStatistics Valid=1369, Invalid=4483, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:34:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-12 15:34:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4413. [2021-06-12 15:34:51,269 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 15:34:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12328 transitions. [2021-06-12 15:34:51,274 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12328 transitions. Word has length 165 [2021-06-12 15:34:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:51,274 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12328 transitions. [2021-06-12 15:34:51,274 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 15:34:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12328 transitions. [2021-06-12 15:34:51,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:51,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:51,278 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 15:34:51,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-12 15:34:51,478 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2086067553, now seen corresponding path program 359 times [2021-06-12 15:34:51,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:51,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527156732] [2021-06-12 15:34:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:51,800 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 15:34:51,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:51,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527156732] [2021-06-12 15:34:51,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527156732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:51,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776741760] [2021-06-12 15:34:51,801 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 15:34:51,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:34:51,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:51,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:51,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:52,069 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 15:34:52,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776741760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:52,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:52,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:52,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576671448] [2021-06-12 15:34:52,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:52,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:52,070 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 15:34:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:52,956 INFO L93 Difference]: Finished difference Result 6181 states and 16067 transitions. [2021-06-12 15:34:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:34:52,956 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 15:34:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:52,961 INFO L225 Difference]: With dead ends: 6181 [2021-06-12 15:34:52,961 INFO L226 Difference]: Without dead ends: 5911 [2021-06-12 15:34:52,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 960.5ms TimeCoverageRelationStatistics Valid=1431, Invalid=4421, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:34:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-12 15:34:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4488. [2021-06-12 15:34:53,002 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 15:34:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12553 transitions. [2021-06-12 15:34:53,006 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12553 transitions. Word has length 165 [2021-06-12 15:34:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:53,007 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12553 transitions. [2021-06-12 15:34:53,007 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 15:34:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12553 transitions. [2021-06-12 15:34:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:53,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:53,010 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 15:34:53,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-12 15:34:53,218 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1446409329, now seen corresponding path program 360 times [2021-06-12 15:34:53,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:53,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306173967] [2021-06-12 15:34:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:53,546 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 15:34:53,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:53,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306173967] [2021-06-12 15:34:53,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306173967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:53,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309836172] [2021-06-12 15:34:53,546 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 15:34:53,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:34:53,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:53,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:53,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:53,835 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 15:34:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309836172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:53,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:53,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962472698] [2021-06-12 15:34:53,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:53,836 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 15:34:54,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:54,895 INFO L93 Difference]: Finished difference Result 6206 states and 16192 transitions. [2021-06-12 15:34:54,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:34:54,895 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 15:34:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:54,900 INFO L225 Difference]: With dead ends: 6206 [2021-06-12 15:34:54,900 INFO L226 Difference]: Without dead ends: 5936 [2021-06-12 15:34:54,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1124.2ms TimeCoverageRelationStatistics Valid=1463, Invalid=4699, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:34:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-12 15:34:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4563. [2021-06-12 15:34:54,962 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 15:34:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12778 transitions. [2021-06-12 15:34:54,967 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12778 transitions. Word has length 165 [2021-06-12 15:34:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:54,967 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12778 transitions. [2021-06-12 15:34:54,967 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 15:34:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12778 transitions. [2021-06-12 15:34:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:54,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:54,971 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 15:34:55,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-12 15:34:55,171 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:55,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2073638941, now seen corresponding path program 361 times [2021-06-12 15:34:55,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:55,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421607322] [2021-06-12 15:34:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:55,487 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 15:34:55,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421607322] [2021-06-12 15:34:55,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421607322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923864609] [2021-06-12 15:34:55,488 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 15:34:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:55,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:55,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:55,747 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 15:34:55,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923864609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:55,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:55,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:55,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681874218] [2021-06-12 15:34:55,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:55,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:55,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:55,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:55,749 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 15:34:56,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:56,677 INFO L93 Difference]: Finished difference Result 6231 states and 16317 transitions. [2021-06-12 15:34:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:34:56,677 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 15:34:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:56,682 INFO L225 Difference]: With dead ends: 6231 [2021-06-12 15:34:56,682 INFO L226 Difference]: Without dead ends: 5961 [2021-06-12 15:34:56,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 964.3ms TimeCoverageRelationStatistics Valid=1539, Invalid=4623, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:34:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-12 15:34:56,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4638. [2021-06-12 15:34:56,743 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 15:34:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 13003 transitions. [2021-06-12 15:34:56,749 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 13003 transitions. Word has length 165 [2021-06-12 15:34:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:56,749 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 13003 transitions. [2021-06-12 15:34:56,749 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 15:34:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 13003 transitions. [2021-06-12 15:34:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:56,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:56,752 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 15:34:56,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:34:56,953 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:56,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:56,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1619725581, now seen corresponding path program 362 times [2021-06-12 15:34:56,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:56,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587160194] [2021-06-12 15:34:56,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:57,257 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 15:34:57,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:57,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587160194] [2021-06-12 15:34:57,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587160194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:57,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397524889] [2021-06-12 15:34:57,257 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 15:34:57,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:34:57,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:57,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:57,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:57,533 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 15:34:57,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397524889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:57,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:57,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:34:57,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663937679] [2021-06-12 15:34:57,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:34:57,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:57,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:34:57,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:34:57,534 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 15:34:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:34:58,661 INFO L93 Difference]: Finished difference Result 6256 states and 16442 transitions. [2021-06-12 15:34:58,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:34:58,661 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 15:34:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:34:58,666 INFO L225 Difference]: With dead ends: 6256 [2021-06-12 15:34:58,666 INFO L226 Difference]: Without dead ends: 5986 [2021-06-12 15:34:58,666 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1145.7ms TimeCoverageRelationStatistics Valid=1573, Invalid=4907, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:34:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-12 15:34:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4713. [2021-06-12 15:34:58,711 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 15:34:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13228 transitions. [2021-06-12 15:34:58,718 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13228 transitions. Word has length 165 [2021-06-12 15:34:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:34:58,718 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13228 transitions. [2021-06-12 15:34:58,718 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 15:34:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13228 transitions. [2021-06-12 15:34:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:34:58,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:34:58,722 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 15:34:58,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-12 15:34:58,922 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:34:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:34:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1797229797, now seen corresponding path program 363 times [2021-06-12 15:34:58,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:34:58,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730468590] [2021-06-12 15:34:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:34:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:34:59,226 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 15:34:59,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:34:59,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730468590] [2021-06-12 15:34:59,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730468590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:59,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758159051] [2021-06-12 15:34:59,227 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 15:34:59,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:34:59,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:34:59,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:34:59,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:34:59,500 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 15:34:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758159051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:34:59,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:34:59,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:34:59,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934026236] [2021-06-12 15:34:59,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:34:59,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:34:59,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:34:59,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:34:59,502 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 15:35:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:00,515 INFO L93 Difference]: Finished difference Result 6281 states and 16567 transitions. [2021-06-12 15:35:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:35:00,516 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 15:35:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:00,521 INFO L225 Difference]: With dead ends: 6281 [2021-06-12 15:35:00,521 INFO L226 Difference]: Without dead ends: 6011 [2021-06-12 15:35:00,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 1034.8ms TimeCoverageRelationStatistics Valid=1663, Invalid=4817, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:35:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-12 15:35:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4788. [2021-06-12 15:35:00,568 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 15:35:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13453 transitions. [2021-06-12 15:35:00,574 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13453 transitions. Word has length 165 [2021-06-12 15:35:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:00,575 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13453 transitions. [2021-06-12 15:35:00,575 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 15:35:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13453 transitions. [2021-06-12 15:35:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:35:00,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:00,578 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 15:35:00,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:00,779 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:00,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1597682699, now seen corresponding path program 364 times [2021-06-12 15:35:00,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:00,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817992464] [2021-06-12 15:35:00,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:01,086 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 15:35:01,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:01,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817992464] [2021-06-12 15:35:01,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817992464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:01,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097290471] [2021-06-12 15:35:01,086 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 15:35:01,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:35:01,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:01,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:35:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:01,372 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 15:35:01,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097290471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:01,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:01,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:35:01,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889735543] [2021-06-12 15:35:01,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:01,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:01,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:01,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:01,373 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 15:35:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:02,613 INFO L93 Difference]: Finished difference Result 6306 states and 16692 transitions. [2021-06-12 15:35:02,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:35:02,613 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 15:35:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:02,619 INFO L225 Difference]: With dead ends: 6306 [2021-06-12 15:35:02,620 INFO L226 Difference]: Without dead ends: 6036 [2021-06-12 15:35:02,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1227.9ms TimeCoverageRelationStatistics Valid=1699, Invalid=5107, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:35:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-12 15:35:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4863. [2021-06-12 15:35:02,678 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 15:35:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13678 transitions. [2021-06-12 15:35:02,685 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13678 transitions. Word has length 165 [2021-06-12 15:35:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:02,685 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13678 transitions. [2021-06-12 15:35:02,685 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 15:35:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13678 transitions. [2021-06-12 15:35:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:35:02,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:02,690 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 15:35:02,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:02,890 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:02,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:02,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1168618393, now seen corresponding path program 365 times [2021-06-12 15:35:02,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:02,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628712012] [2021-06-12 15:35:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:03,189 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 15:35:03,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:03,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628712012] [2021-06-12 15:35:03,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628712012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:03,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144543199] [2021-06-12 15:35:03,190 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 15:35:03,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:35:03,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:03,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:35:03,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:03,451 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 15:35:03,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144543199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:03,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:03,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:35:03,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814751383] [2021-06-12 15:35:03,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:35:03,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:03,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:35:03,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:35:03,452 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 15:35:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:04,511 INFO L93 Difference]: Finished difference Result 6331 states and 16817 transitions. [2021-06-12 15:35:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:35:04,511 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 15:35:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:04,517 INFO L225 Difference]: With dead ends: 6331 [2021-06-12 15:35:04,517 INFO L226 Difference]: Without dead ends: 6061 [2021-06-12 15:35:04,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 1051.7ms TimeCoverageRelationStatistics Valid=1803, Invalid=5003, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:35:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-12 15:35:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4938. [2021-06-12 15:35:04,573 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 15:35:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13903 transitions. [2021-06-12 15:35:04,580 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13903 transitions. Word has length 165 [2021-06-12 15:35:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:04,580 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13903 transitions. [2021-06-12 15:35:04,580 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 15:35:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13903 transitions. [2021-06-12 15:35:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:35:04,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:04,584 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 15:35:04,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:04,785 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:04,785 INFO L82 PathProgramCache]: Analyzing trace with hash 482435209, now seen corresponding path program 366 times [2021-06-12 15:35:04,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:04,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600093114] [2021-06-12 15:35:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:05,085 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 15:35:05,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:05,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600093114] [2021-06-12 15:35:05,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600093114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318700465] [2021-06-12 15:35:05,086 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 15:35:05,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:35:05,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:05,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:35:05,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:05,379 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 15:35:05,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318700465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:05,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:05,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:35:05,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503894771] [2021-06-12 15:35:05,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:05,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:05,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:05,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:05,380 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 15:35:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:06,678 INFO L93 Difference]: Finished difference Result 6356 states and 16942 transitions. [2021-06-12 15:35:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:35:06,678 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 15:35:06,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:06,685 INFO L225 Difference]: With dead ends: 6356 [2021-06-12 15:35:06,685 INFO L226 Difference]: Without dead ends: 6086 [2021-06-12 15:35:06,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 1285.2ms TimeCoverageRelationStatistics Valid=1841, Invalid=5299, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:35:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-12 15:35:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5013. [2021-06-12 15:35:06,746 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 15:35:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14128 transitions. [2021-06-12 15:35:06,753 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14128 transitions. Word has length 165 [2021-06-12 15:35:06,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:06,754 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14128 transitions. [2021-06-12 15:35:06,754 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 15:35:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14128 transitions. [2021-06-12 15:35:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:35:06,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:06,758 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 15:35:06,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:06,959 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:06,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:06,959 INFO L82 PathProgramCache]: Analyzing trace with hash 397400471, now seen corresponding path program 367 times [2021-06-12 15:35:06,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:06,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131337579] [2021-06-12 15:35:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:07,258 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 15:35:07,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:07,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131337579] [2021-06-12 15:35:07,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131337579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:07,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888229146] [2021-06-12 15:35:07,259 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 15:35:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:07,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:35:07,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:07,577 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 15:35:07,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888229146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:07,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:07,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:35:07,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142674118] [2021-06-12 15:35:07,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:35:07,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:07,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:35:07,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:35:07,579 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 15:35:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:08,676 INFO L93 Difference]: Finished difference Result 6381 states and 17067 transitions. [2021-06-12 15:35:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:35:08,676 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 15:35:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:08,682 INFO L225 Difference]: With dead ends: 6381 [2021-06-12 15:35:08,682 INFO L226 Difference]: Without dead ends: 6111 [2021-06-12 15:35:08,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1086.2ms TimeCoverageRelationStatistics Valid=1959, Invalid=5181, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:35:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-12 15:35:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 5088. [2021-06-12 15:35:08,743 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 15:35:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14353 transitions. [2021-06-12 15:35:08,751 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14353 transitions. Word has length 165 [2021-06-12 15:35:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:08,751 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14353 transitions. [2021-06-12 15:35:08,751 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 15:35:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14353 transitions. [2021-06-12 15:35:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:35:08,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:08,756 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 15:35:08,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-12 15:35:08,956 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash 329249415, now seen corresponding path program 368 times [2021-06-12 15:35:08,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:08,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294893760] [2021-06-12 15:35:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:09,285 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 15:35:09,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:09,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294893760] [2021-06-12 15:35:09,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294893760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:09,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936528242] [2021-06-12 15:35:09,285 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 15:35:09,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:35:09,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:35:09,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:09,563 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 15:35:09,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936528242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:09,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:09,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:35:09,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688904832] [2021-06-12 15:35:09,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:09,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:09,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:09,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:09,564 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 15:35:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:10,912 INFO L93 Difference]: Finished difference Result 6406 states and 17192 transitions. [2021-06-12 15:35:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:35:10,913 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 15:35:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:10,917 INFO L225 Difference]: With dead ends: 6406 [2021-06-12 15:35:10,917 INFO L226 Difference]: Without dead ends: 6136 [2021-06-12 15:35:10,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1340.8ms TimeCoverageRelationStatistics Valid=1999, Invalid=5483, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:35:10,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-12 15:35:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 5163. [2021-06-12 15:35:10,971 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 15:35:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14578 transitions. [2021-06-12 15:35:10,978 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14578 transitions. Word has length 165 [2021-06-12 15:35:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:10,978 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14578 transitions. [2021-06-12 15:35:10,978 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 15:35:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14578 transitions. [2021-06-12 15:35:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:35:10,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:10,983 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 15:35:11,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-12 15:35:11,183 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:11,183 INFO L82 PathProgramCache]: Analyzing trace with hash -967719659, now seen corresponding path program 369 times [2021-06-12 15:35:11,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:11,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588707394] [2021-06-12 15:35:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:11,486 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 15:35:11,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:11,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588707394] [2021-06-12 15:35:11,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588707394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:11,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303852271] [2021-06-12 15:35:11,486 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 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 15:35:11,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 15:35:11,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:35:11,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:11,755 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 15:35:11,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303852271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:11,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:11,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:35:11,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105765401] [2021-06-12 15:35:11,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:35:11,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:11,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:35:11,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:35:11,756 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 15:35:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:12,906 INFO L93 Difference]: Finished difference Result 6431 states and 17317 transitions. [2021-06-12 15:35:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:35:12,907 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 15:35:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:12,912 INFO L225 Difference]: With dead ends: 6431 [2021-06-12 15:35:12,913 INFO L226 Difference]: Without dead ends: 6161 [2021-06-12 15:35:12,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1148.5ms TimeCoverageRelationStatistics Valid=2131, Invalid=5351, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:35:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-12 15:35:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 5238. [2021-06-12 15:35:12,970 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 15:35:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14803 transitions. [2021-06-12 15:35:12,978 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14803 transitions. Word has length 165 [2021-06-12 15:35:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:12,978 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14803 transitions. [2021-06-12 15:35:12,978 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 15:35:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14803 transitions. [2021-06-12 15:35:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:35:12,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:12,982 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 15:35:13,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-12 15:35:13,183 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:13,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:13,183 INFO L82 PathProgramCache]: Analyzing trace with hash -537966075, now seen corresponding path program 370 times [2021-06-12 15:35:13,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:13,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876604344] [2021-06-12 15:35:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:13,481 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 15:35:13,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:13,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876604344] [2021-06-12 15:35:13,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876604344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:13,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682873557] [2021-06-12 15:35:13,482 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 15:35:13,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:35:13,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:13,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:35:13,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:13,757 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 15:35:13,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682873557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:13,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:13,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:35:13,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789680319] [2021-06-12 15:35:13,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:13,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:13,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:13,759 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 15:35:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:15,164 INFO L93 Difference]: Finished difference Result 6516 states and 17607 transitions. [2021-06-12 15:35:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:35:15,164 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 15:35:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:15,170 INFO L225 Difference]: With dead ends: 6516 [2021-06-12 15:35:15,170 INFO L226 Difference]: Without dead ends: 6246 [2021-06-12 15:35:15,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1375.0ms TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:35:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2021-06-12 15:35:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 5313. [2021-06-12 15:35:15,233 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 15:35:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 15048 transitions. [2021-06-12 15:35:15,241 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 15048 transitions. Word has length 165 [2021-06-12 15:35:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:15,242 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 15048 transitions. [2021-06-12 15:35:15,242 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 15:35:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 15048 transitions. [2021-06-12 15:35:15,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:35:15,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:15,247 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 15:35:15,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-12 15:35:15,447 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:15,448 INFO L82 PathProgramCache]: Analyzing trace with hash -595700205, now seen corresponding path program 371 times [2021-06-12 15:35:15,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:15,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387734039] [2021-06-12 15:35:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:15,757 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 15:35:15,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:15,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387734039] [2021-06-12 15:35:15,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387734039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:15,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785892460] [2021-06-12 15:35:15,758 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 15:35:15,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 15:35:15,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:15,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:35:15,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:16,019 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 15:35:16,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785892460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:16,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:16,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 15:35:16,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743187966] [2021-06-12 15:35:16,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 15:35:16,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:16,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 15:35:16,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:35:16,020 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 15:35:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:17,224 INFO L93 Difference]: Finished difference Result 7258 states and 19731 transitions. [2021-06-12 15:35:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:35:17,224 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 15:35:17,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:17,232 INFO L225 Difference]: With dead ends: 7258 [2021-06-12 15:35:17,232 INFO L226 Difference]: Without dead ends: 6988 [2021-06-12 15:35:17,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1189.8ms TimeCoverageRelationStatistics Valid=2320, Invalid=5512, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:35:17,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-06-12 15:35:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 5493. [2021-06-12 15:35:17,291 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 15:35:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 15607 transitions. [2021-06-12 15:35:17,299 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 15607 transitions. Word has length 165 [2021-06-12 15:35:17,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:17,299 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 15607 transitions. [2021-06-12 15:35:17,299 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 15:35:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 15607 transitions. [2021-06-12 15:35:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-12 15:35:17,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:17,303 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 15:35:17,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:17,504 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:17,504 INFO L82 PathProgramCache]: Analyzing trace with hash -573356955, now seen corresponding path program 372 times [2021-06-12 15:35:17,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:17,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953739445] [2021-06-12 15:35:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:17,808 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 15:35:17,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:17,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953739445] [2021-06-12 15:35:17,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953739445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:17,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051989369] [2021-06-12 15:35:17,809 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 15:35:17,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 15:35:17,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:17,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 15:35:17,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:18,126 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 15:35:18,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051989369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:18,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:18,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-12 15:35:18,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747269062] [2021-06-12 15:35:18,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:18,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:18,127 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 15:35:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:19,540 INFO L93 Difference]: Finished difference Result 6720 states and 18381 transitions. [2021-06-12 15:35:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:35:19,540 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 15:35:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:19,547 INFO L225 Difference]: With dead ends: 6720 [2021-06-12 15:35:19,547 INFO L226 Difference]: Without dead ends: 6231 [2021-06-12 15:35:19,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1395.6ms TimeCoverageRelationStatistics Valid=2366, Invalid=5824, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:35:19,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6231 states. [2021-06-12 15:35:19,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6231 to 3434. [2021-06-12 15:35:19,590 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 15:35:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9416 transitions. [2021-06-12 15:35:19,594 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9416 transitions. Word has length 165 [2021-06-12 15:35:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:19,594 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 9416 transitions. [2021-06-12 15:35:19,594 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 15:35:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9416 transitions. [2021-06-12 15:35:19,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:19,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:19,597 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 15:35:19,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-12 15:35:19,798 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:19,798 INFO L82 PathProgramCache]: Analyzing trace with hash -471160217, now seen corresponding path program 373 times [2021-06-12 15:35:19,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:19,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081968624] [2021-06-12 15:35:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:20,196 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 15:35:20,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:20,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081968624] [2021-06-12 15:35:20,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081968624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:20,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091656277] [2021-06-12 15:35:20,196 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 15:35:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:20,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:35:20,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:20,525 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 15:35:20,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091656277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:20,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:20,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:35:20,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140770818] [2021-06-12 15:35:20,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:35:20,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:20,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:35:20,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:35:20,526 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 15:35:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:21,301 INFO L93 Difference]: Finished difference Result 4774 states and 12416 transitions. [2021-06-12 15:35:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:35:21,301 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 15:35:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:21,306 INFO L225 Difference]: With dead ends: 4774 [2021-06-12 15:35:21,306 INFO L226 Difference]: Without dead ends: 4440 [2021-06-12 15:35:21,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 923.2ms TimeCoverageRelationStatistics Valid=1320, Invalid=3510, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:35:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-06-12 15:35:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3519. [2021-06-12 15:35:21,340 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 15:35:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 9586 transitions. [2021-06-12 15:35:21,344 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 9586 transitions. Word has length 170 [2021-06-12 15:35:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:21,344 INFO L482 AbstractCegarLoop]: Abstraction has 3519 states and 9586 transitions. [2021-06-12 15:35:21,344 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 15:35:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 9586 transitions. [2021-06-12 15:35:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:21,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:21,347 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 15:35:21,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:21,549 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:21,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:21,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1251320075, now seen corresponding path program 374 times [2021-06-12 15:35:21,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:21,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377930612] [2021-06-12 15:35:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:21,963 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 15:35:21,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:21,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377930612] [2021-06-12 15:35:21,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377930612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:21,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374419661] [2021-06-12 15:35:21,963 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 15:35:22,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:35:22,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:22,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:22,252 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 15:35:22,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374419661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:22,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:22,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:22,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679488112] [2021-06-12 15:35:22,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:22,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:22,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:22,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:22,253 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 15:35:22,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:22,898 INFO L93 Difference]: Finished difference Result 6096 states and 14997 transitions. [2021-06-12 15:35:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:35:22,898 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 15:35:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:22,905 INFO L225 Difference]: With dead ends: 6096 [2021-06-12 15:35:22,906 INFO L226 Difference]: Without dead ends: 5826 [2021-06-12 15:35:22,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 823.4ms TimeCoverageRelationStatistics Valid=1132, Invalid=2900, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:35:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-12 15:35:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 3663. [2021-06-12 15:35:22,949 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 15:35:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10003 transitions. [2021-06-12 15:35:22,954 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10003 transitions. Word has length 170 [2021-06-12 15:35:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:22,954 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10003 transitions. [2021-06-12 15:35:22,954 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 15:35:22,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10003 transitions. [2021-06-12 15:35:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:22,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:22,958 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 15:35:23,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:23,159 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:23,159 INFO L82 PathProgramCache]: Analyzing trace with hash 310384123, now seen corresponding path program 375 times [2021-06-12 15:35:23,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:23,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596518058] [2021-06-12 15:35:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:23,593 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 15:35:23,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:23,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596518058] [2021-06-12 15:35:23,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596518058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:23,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232671815] [2021-06-12 15:35:23,595 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 15:35:23,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:35:23,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:23,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:23,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:23,913 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 15:35:23,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232671815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:23,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:23,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:23,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941735261] [2021-06-12 15:35:23,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:23,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:23,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:23,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:23,914 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 15:35:24,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:24,644 INFO L93 Difference]: Finished difference Result 6056 states and 14992 transitions. [2021-06-12 15:35:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:35:24,644 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 15:35:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:24,650 INFO L225 Difference]: With dead ends: 6056 [2021-06-12 15:35:24,651 INFO L226 Difference]: Without dead ends: 5786 [2021-06-12 15:35:24,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 944.6ms TimeCoverageRelationStatistics Valid=1215, Invalid=3341, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:35:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-12 15:35:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 3738. [2021-06-12 15:35:24,698 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 15:35:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10228 transitions. [2021-06-12 15:35:24,703 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10228 transitions. Word has length 170 [2021-06-12 15:35:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:24,703 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10228 transitions. [2021-06-12 15:35:24,703 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 15:35:24,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10228 transitions. [2021-06-12 15:35:24,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:24,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:24,706 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 15:35:24,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:24,914 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1941712905, now seen corresponding path program 376 times [2021-06-12 15:35:24,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:24,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686974823] [2021-06-12 15:35:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:25,345 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 15:35:25,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:25,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686974823] [2021-06-12 15:35:25,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686974823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:25,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237984966] [2021-06-12 15:35:25,346 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 15:35:25,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:35:25,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:25,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:25,633 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 15:35:25,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237984966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:25,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:25,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:25,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112799219] [2021-06-12 15:35:25,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:25,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:25,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:25,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:25,635 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 15:35:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:26,329 INFO L93 Difference]: Finished difference Result 6106 states and 15167 transitions. [2021-06-12 15:35:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:35:26,329 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 15:35:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:26,335 INFO L225 Difference]: With dead ends: 6106 [2021-06-12 15:35:26,335 INFO L226 Difference]: Without dead ends: 5836 [2021-06-12 15:35:26,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 894.3ms TimeCoverageRelationStatistics Valid=1129, Invalid=3161, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:35:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-12 15:35:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 3813. [2021-06-12 15:35:26,379 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 15:35:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10453 transitions. [2021-06-12 15:35:26,384 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10453 transitions. Word has length 170 [2021-06-12 15:35:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:26,384 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10453 transitions. [2021-06-12 15:35:26,384 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 15:35:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10453 transitions. [2021-06-12 15:35:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:26,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:26,388 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 15:35:26,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:26,589 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:26,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1096225017, now seen corresponding path program 377 times [2021-06-12 15:35:26,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:26,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146074777] [2021-06-12 15:35:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:27,008 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 15:35:27,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:27,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146074777] [2021-06-12 15:35:27,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146074777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:27,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913053780] [2021-06-12 15:35:27,009 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 15:35:27,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:35:27,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:27,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:27,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:27,317 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 15:35:27,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913053780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:27,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:27,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:27,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982042681] [2021-06-12 15:35:27,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:27,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:27,319 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 15:35:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:28,104 INFO L93 Difference]: Finished difference Result 6131 states and 15292 transitions. [2021-06-12 15:35:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:35:28,105 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 15:35:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:28,110 INFO L225 Difference]: With dead ends: 6131 [2021-06-12 15:35:28,111 INFO L226 Difference]: Without dead ends: 5861 [2021-06-12 15:35:28,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 989.9ms TimeCoverageRelationStatistics Valid=1220, Invalid=3610, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:35:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-12 15:35:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 3888. [2021-06-12 15:35:28,153 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 15:35:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10678 transitions. [2021-06-12 15:35:28,158 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10678 transitions. Word has length 170 [2021-06-12 15:35:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:28,158 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10678 transitions. [2021-06-12 15:35:28,158 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 15:35:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10678 transitions. [2021-06-12 15:35:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:28,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:28,162 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 15:35:28,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:28,363 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash -809778041, now seen corresponding path program 378 times [2021-06-12 15:35:28,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:28,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65820888] [2021-06-12 15:35:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:28,752 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 15:35:28,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:28,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65820888] [2021-06-12 15:35:28,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65820888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:28,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837323750] [2021-06-12 15:35:28,753 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 15:35:28,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:35:28,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:28,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:28,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:29,051 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 15:35:29,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837323750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:29,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:29,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:29,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409656602] [2021-06-12 15:35:29,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:29,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:29,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:29,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:29,052 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 15:35:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:29,805 INFO L93 Difference]: Finished difference Result 6156 states and 15417 transitions. [2021-06-12 15:35:29,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:35:29,806 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 15:35:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:29,811 INFO L225 Difference]: With dead ends: 6156 [2021-06-12 15:35:29,812 INFO L226 Difference]: Without dead ends: 5886 [2021-06-12 15:35:29,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 871.8ms TimeCoverageRelationStatistics Valid=1142, Invalid=3414, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:35:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-12 15:35:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 3963. [2021-06-12 15:35:29,857 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 15:35:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10903 transitions. [2021-06-12 15:35:29,862 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10903 transitions. Word has length 170 [2021-06-12 15:35:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:29,862 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10903 transitions. [2021-06-12 15:35:29,862 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 15:35:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10903 transitions. [2021-06-12 15:35:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:29,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:29,866 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 15:35:30,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-12 15:35:30,066 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:30,066 INFO L82 PathProgramCache]: Analyzing trace with hash 73273719, now seen corresponding path program 379 times [2021-06-12 15:35:30,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:30,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460957089] [2021-06-12 15:35:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:30,459 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 15:35:30,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:30,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460957089] [2021-06-12 15:35:30,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460957089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:30,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144141166] [2021-06-12 15:35:30,460 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 15:35:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:30,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:30,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:30,763 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 15:35:30,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144141166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:30,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:30,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:30,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100046313] [2021-06-12 15:35:30,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:30,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:30,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:30,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:30,764 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 15:35:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:31,626 INFO L93 Difference]: Finished difference Result 6181 states and 15542 transitions. [2021-06-12 15:35:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:35:31,626 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 15:35:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:31,632 INFO L225 Difference]: With dead ends: 6181 [2021-06-12 15:35:31,632 INFO L226 Difference]: Without dead ends: 5911 [2021-06-12 15:35:31,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1019.4ms TimeCoverageRelationStatistics Valid=1241, Invalid=3871, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:35:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-12 15:35:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4038. [2021-06-12 15:35:31,677 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 15:35:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11128 transitions. [2021-06-12 15:35:31,682 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11128 transitions. Word has length 170 [2021-06-12 15:35:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:31,682 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11128 transitions. [2021-06-12 15:35:31,682 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 15:35:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11128 transitions. [2021-06-12 15:35:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:31,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:31,686 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 15:35:31,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-12 15:35:31,886 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:31,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1818935675, now seen corresponding path program 380 times [2021-06-12 15:35:31,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:31,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011620689] [2021-06-12 15:35:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:32,261 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 15:35:32,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:32,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011620689] [2021-06-12 15:35:32,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011620689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:32,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092624439] [2021-06-12 15:35:32,261 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 15:35:32,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:35:32,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:32,546 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 15:35:32,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092624439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:32,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:32,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:32,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232253141] [2021-06-12 15:35:32,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:32,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:32,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:32,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:32,547 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 15:35:33,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:33,358 INFO L93 Difference]: Finished difference Result 6206 states and 15667 transitions. [2021-06-12 15:35:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:35:33,358 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 15:35:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:33,365 INFO L225 Difference]: With dead ends: 6206 [2021-06-12 15:35:33,366 INFO L226 Difference]: Without dead ends: 5936 [2021-06-12 15:35:33,366 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 921.7ms TimeCoverageRelationStatistics Valid=1171, Invalid=3659, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:35:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-12 15:35:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4113. [2021-06-12 15:35:33,424 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 15:35:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11353 transitions. [2021-06-12 15:35:33,429 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11353 transitions. Word has length 170 [2021-06-12 15:35:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:33,429 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11353 transitions. [2021-06-12 15:35:33,429 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 15:35:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11353 transitions. [2021-06-12 15:35:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:33,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:33,433 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 15:35:33,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-12 15:35:33,633 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash 22411125, now seen corresponding path program 381 times [2021-06-12 15:35:33,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:33,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949605117] [2021-06-12 15:35:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:34,021 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 15:35:34,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:34,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949605117] [2021-06-12 15:35:34,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949605117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:34,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201301199] [2021-06-12 15:35:34,022 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 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 15:35:34,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:35:34,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:34,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:34,332 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 15:35:34,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201301199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:34,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:34,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:34,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099266951] [2021-06-12 15:35:34,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:34,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:34,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:34,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:34,333 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 15:35:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:35,257 INFO L93 Difference]: Finished difference Result 6231 states and 15792 transitions. [2021-06-12 15:35:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:35:35,257 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 15:35:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:35,263 INFO L225 Difference]: With dead ends: 6231 [2021-06-12 15:35:35,263 INFO L226 Difference]: Without dead ends: 5961 [2021-06-12 15:35:35,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1068.8ms TimeCoverageRelationStatistics Valid=1278, Invalid=4124, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:35:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-12 15:35:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4188. [2021-06-12 15:35:35,309 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 15:35:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11578 transitions. [2021-06-12 15:35:35,314 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11578 transitions. Word has length 170 [2021-06-12 15:35:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:35,314 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11578 transitions. [2021-06-12 15:35:35,315 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 15:35:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11578 transitions. [2021-06-12 15:35:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:35,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:35,318 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 15:35:35,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-12 15:35:35,518 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:35,519 INFO L82 PathProgramCache]: Analyzing trace with hash 903970307, now seen corresponding path program 382 times [2021-06-12 15:35:35,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:35,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462783227] [2021-06-12 15:35:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:35,884 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 15:35:35,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:35,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462783227] [2021-06-12 15:35:35,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462783227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:35,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681819193] [2021-06-12 15:35:35,885 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 15:35:35,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:35:35,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:35,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:36,166 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 15:35:36,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681819193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:36,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:36,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:36,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938586955] [2021-06-12 15:35:36,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:36,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:36,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:36,167 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 15:35:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:37,002 INFO L93 Difference]: Finished difference Result 6256 states and 15917 transitions. [2021-06-12 15:35:37,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:35:37,002 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 15:35:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:37,009 INFO L225 Difference]: With dead ends: 6256 [2021-06-12 15:35:37,009 INFO L226 Difference]: Without dead ends: 5986 [2021-06-12 15:35:37,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 922.0ms TimeCoverageRelationStatistics Valid=1216, Invalid=3896, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:35:37,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-12 15:35:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4263. [2021-06-12 15:35:37,060 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 15:35:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11803 transitions. [2021-06-12 15:35:37,066 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11803 transitions. Word has length 170 [2021-06-12 15:35:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:37,066 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11803 transitions. [2021-06-12 15:35:37,066 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 15:35:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11803 transitions. [2021-06-12 15:35:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:37,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:37,070 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 15:35:37,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:37,273 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash 261595891, now seen corresponding path program 383 times [2021-06-12 15:35:37,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:37,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020569317] [2021-06-12 15:35:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:37,660 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 15:35:37,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:37,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020569317] [2021-06-12 15:35:37,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020569317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:37,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251166820] [2021-06-12 15:35:37,660 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 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 15:35:37,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:35:37,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:37,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:37,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:37,962 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 15:35:37,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251166820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:37,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:37,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:37,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190061431] [2021-06-12 15:35:37,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:37,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:37,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:37,963 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 15:35:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:38,949 INFO L93 Difference]: Finished difference Result 6281 states and 16042 transitions. [2021-06-12 15:35:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:35:38,949 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 15:35:38,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:38,955 INFO L225 Difference]: With dead ends: 6281 [2021-06-12 15:35:38,955 INFO L226 Difference]: Without dead ends: 6011 [2021-06-12 15:35:38,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1093.6ms TimeCoverageRelationStatistics Valid=1331, Invalid=4369, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:35:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-12 15:35:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4338. [2021-06-12 15:35:39,020 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 15:35:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12028 transitions. [2021-06-12 15:35:39,027 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12028 transitions. Word has length 170 [2021-06-12 15:35:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:39,027 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12028 transitions. [2021-06-12 15:35:39,027 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 15:35:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12028 transitions. [2021-06-12 15:35:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:39,031 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:39,031 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 15:35:39,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:39,231 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:39,232 INFO L82 PathProgramCache]: Analyzing trace with hash 215048961, now seen corresponding path program 384 times [2021-06-12 15:35:39,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:39,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552894612] [2021-06-12 15:35:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:39,570 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 15:35:39,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:39,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552894612] [2021-06-12 15:35:39,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552894612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:39,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925792673] [2021-06-12 15:35:39,571 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 15:35:39,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:35:39,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:39,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:39,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:39,887 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 15:35:39,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925792673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:39,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:39,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:39,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449329231] [2021-06-12 15:35:39,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:39,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:39,888 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 15:35:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:40,759 INFO L93 Difference]: Finished difference Result 6306 states and 16167 transitions. [2021-06-12 15:35:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:35:40,759 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 15:35:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:40,765 INFO L225 Difference]: With dead ends: 6306 [2021-06-12 15:35:40,766 INFO L226 Difference]: Without dead ends: 6036 [2021-06-12 15:35:40,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 963.3ms TimeCoverageRelationStatistics Valid=1277, Invalid=4125, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:35:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-12 15:35:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4413. [2021-06-12 15:35:40,832 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 15:35:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12253 transitions. [2021-06-12 15:35:40,838 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12253 transitions. Word has length 170 [2021-06-12 15:35:40,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:40,838 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12253 transitions. [2021-06-12 15:35:40,838 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 15:35:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12253 transitions. [2021-06-12 15:35:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:40,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:40,842 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 15:35:41,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-12 15:35:41,042 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:41,043 INFO L82 PathProgramCache]: Analyzing trace with hash -703335439, now seen corresponding path program 385 times [2021-06-12 15:35:41,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:41,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647386621] [2021-06-12 15:35:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:41,388 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 15:35:41,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:41,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647386621] [2021-06-12 15:35:41,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647386621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:41,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088192228] [2021-06-12 15:35:41,388 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 15:35:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:41,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:41,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:41,714 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 15:35:41,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088192228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:41,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:41,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:41,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462796619] [2021-06-12 15:35:41,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:41,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:41,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:41,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:41,715 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 15:35:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:42,817 INFO L93 Difference]: Finished difference Result 6331 states and 16292 transitions. [2021-06-12 15:35:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:35:42,818 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 15:35:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:42,822 INFO L225 Difference]: With dead ends: 6331 [2021-06-12 15:35:42,822 INFO L226 Difference]: Without dead ends: 6061 [2021-06-12 15:35:42,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1157.4ms TimeCoverageRelationStatistics Valid=1400, Invalid=4606, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:35:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-12 15:35:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4488. [2021-06-12 15:35:42,867 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 15:35:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12478 transitions. [2021-06-12 15:35:42,873 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12478 transitions. Word has length 170 [2021-06-12 15:35:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:42,873 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12478 transitions. [2021-06-12 15:35:42,873 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 15:35:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12478 transitions. [2021-06-12 15:35:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:42,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:42,877 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 15:35:43,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:43,078 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:43,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:43,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1814941055, now seen corresponding path program 386 times [2021-06-12 15:35:43,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:43,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309313728] [2021-06-12 15:35:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:43,410 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 15:35:43,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:43,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309313728] [2021-06-12 15:35:43,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309313728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:43,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703024862] [2021-06-12 15:35:43,410 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 15:35:43,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:35:43,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:43,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:43,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:43,690 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 15:35:43,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703024862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:43,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:43,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:43,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726900905] [2021-06-12 15:35:43,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:43,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:43,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:43,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:43,691 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 15:35:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:44,649 INFO L93 Difference]: Finished difference Result 6356 states and 16417 transitions. [2021-06-12 15:35:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:35:44,650 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 15:35:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:44,655 INFO L225 Difference]: With dead ends: 6356 [2021-06-12 15:35:44,655 INFO L226 Difference]: Without dead ends: 6086 [2021-06-12 15:35:44,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1011.2ms TimeCoverageRelationStatistics Valid=1354, Invalid=4346, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:35:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-12 15:35:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4563. [2021-06-12 15:35:44,702 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 15:35:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12703 transitions. [2021-06-12 15:35:44,708 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12703 transitions. Word has length 170 [2021-06-12 15:35:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:44,708 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12703 transitions. [2021-06-12 15:35:44,708 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 15:35:44,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12703 transitions. [2021-06-12 15:35:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:44,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:44,712 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 15:35:44,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-06-12 15:35:44,912 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash -380384657, now seen corresponding path program 387 times [2021-06-12 15:35:44,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:44,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187387086] [2021-06-12 15:35:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:45,244 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 15:35:45,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:45,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187387086] [2021-06-12 15:35:45,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187387086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:45,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017921577] [2021-06-12 15:35:45,244 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 15:35:45,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:35:45,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:45,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:45,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:45,553 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 15:35:45,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017921577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:45,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:45,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:45,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545262671] [2021-06-12 15:35:45,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:45,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:45,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:45,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:45,554 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 15:35:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:46,710 INFO L93 Difference]: Finished difference Result 6381 states and 16542 transitions. [2021-06-12 15:35:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:35:46,710 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 15:35:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:46,716 INFO L225 Difference]: With dead ends: 6381 [2021-06-12 15:35:46,716 INFO L226 Difference]: Without dead ends: 6111 [2021-06-12 15:35:46,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 1197.8ms TimeCoverageRelationStatistics Valid=1485, Invalid=4835, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:35:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-12 15:35:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4638. [2021-06-12 15:35:46,767 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 15:35:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 12928 transitions. [2021-06-12 15:35:46,772 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 12928 transitions. Word has length 170 [2021-06-12 15:35:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:46,773 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 12928 transitions. [2021-06-12 15:35:46,773 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 15:35:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 12928 transitions. [2021-06-12 15:35:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:46,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:46,777 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 15:35:46,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:46,977 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:46,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1129815421, now seen corresponding path program 388 times [2021-06-12 15:35:46,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:46,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515801758] [2021-06-12 15:35:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:47,361 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 15:35:47,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:47,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515801758] [2021-06-12 15:35:47,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515801758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:47,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312005407] [2021-06-12 15:35:47,361 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 15:35:47,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:35:47,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:47,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:47,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:47,692 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 15:35:47,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312005407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:47,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:47,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:47,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521326857] [2021-06-12 15:35:47,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:47,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:47,693 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 15:35:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:48,896 INFO L93 Difference]: Finished difference Result 6406 states and 16667 transitions. [2021-06-12 15:35:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:35:48,897 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 15:35:48,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:48,904 INFO L225 Difference]: With dead ends: 6406 [2021-06-12 15:35:48,904 INFO L226 Difference]: Without dead ends: 6136 [2021-06-12 15:35:48,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1234.6ms TimeCoverageRelationStatistics Valid=1447, Invalid=4559, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:35:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-12 15:35:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4713. [2021-06-12 15:35:48,976 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 15:35:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13153 transitions. [2021-06-12 15:35:48,985 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13153 transitions. Word has length 170 [2021-06-12 15:35:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:48,986 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13153 transitions. [2021-06-12 15:35:48,986 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 15:35:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13153 transitions. [2021-06-12 15:35:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:48,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:48,991 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 15:35:49,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:49,214 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:49,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1769473645, now seen corresponding path program 389 times [2021-06-12 15:35:49,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:49,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71237363] [2021-06-12 15:35:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:49,660 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 15:35:49,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:49,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71237363] [2021-06-12 15:35:49,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71237363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:49,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598319563] [2021-06-12 15:35:49,661 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 15:35:49,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:35:49,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:49,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:49,761 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 [598319563] 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 34 [2021-06-12 15:35:50,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092981954] [2021-06-12 15:35:50,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:50,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:50,017 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 15:35:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:51,481 INFO L93 Difference]: Finished difference Result 6431 states and 16792 transitions. [2021-06-12 15:35:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:35:51,481 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 15:35:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:51,489 INFO L225 Difference]: With dead ends: 6431 [2021-06-12 15:35:51,489 INFO L226 Difference]: Without dead ends: 6161 [2021-06-12 15:35:51,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1488.2ms TimeCoverageRelationStatistics Valid=1586, Invalid=5056, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:35:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-12 15:35:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4788. [2021-06-12 15:35:51,563 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 15:35:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13378 transitions. [2021-06-12 15:35:51,572 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13378 transitions. Word has length 170 [2021-06-12 15:35:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:51,572 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13378 transitions. [2021-06-12 15:35:51,572 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 15:35:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13378 transitions. [2021-06-12 15:35:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:51,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:51,577 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 15:35:51,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:51,801 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash 994554619, now seen corresponding path program 390 times [2021-06-12 15:35:51,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:51,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995812881] [2021-06-12 15:35:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:52,240 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 15:35:52,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:52,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995812881] [2021-06-12 15:35:52,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995812881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:52,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925375499] [2021-06-12 15:35:52,241 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 15:35:52,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:35:52,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:52,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:52,652 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 15:35:52,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925375499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:52,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:52,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:52,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837001932] [2021-06-12 15:35:52,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:52,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:52,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:52,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:52,653 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 15:35:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:53,895 INFO L93 Difference]: Finished difference Result 6456 states and 16917 transitions. [2021-06-12 15:35:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:35:53,895 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 15:35:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:53,903 INFO L225 Difference]: With dead ends: 6456 [2021-06-12 15:35:53,904 INFO L226 Difference]: Without dead ends: 6186 [2021-06-12 15:35:53,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1267.1ms TimeCoverageRelationStatistics Valid=1556, Invalid=4764, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:35:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-06-12 15:35:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4863. [2021-06-12 15:35:53,978 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 15:35:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13603 transitions. [2021-06-12 15:35:53,988 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13603 transitions. Word has length 170 [2021-06-12 15:35:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:53,988 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13603 transitions. [2021-06-12 15:35:53,988 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 15:35:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13603 transitions. [2021-06-12 15:35:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:53,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:54,007 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 15:35:54,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-12 15:35:54,229 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:54,229 INFO L82 PathProgramCache]: Analyzing trace with hash 540641259, now seen corresponding path program 391 times [2021-06-12 15:35:54,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:54,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012681710] [2021-06-12 15:35:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:54,691 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 15:35:54,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:54,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012681710] [2021-06-12 15:35:54,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012681710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:54,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327741578] [2021-06-12 15:35:54,692 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 15:35:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:54,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:54,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:55,035 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 15:35:55,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327741578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:55,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:55,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:55,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634410662] [2021-06-12 15:35:55,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:55,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:55,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:55,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:55,037 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 15:35:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:56,533 INFO L93 Difference]: Finished difference Result 6481 states and 17042 transitions. [2021-06-12 15:35:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:35:56,533 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 15:35:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:56,542 INFO L225 Difference]: With dead ends: 6481 [2021-06-12 15:35:56,542 INFO L226 Difference]: Without dead ends: 6211 [2021-06-12 15:35:56,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1578.7ms TimeCoverageRelationStatistics Valid=1703, Invalid=5269, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:35:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-06-12 15:35:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4938. [2021-06-12 15:35:56,648 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 15:35:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13828 transitions. [2021-06-12 15:35:56,658 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13828 transitions. Word has length 170 [2021-06-12 15:35:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:56,658 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13828 transitions. [2021-06-12 15:35:56,658 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 15:35:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13828 transitions. [2021-06-12 15:35:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:56,664 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:56,664 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 15:35:56,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:35:56,879 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:56,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1418653177, now seen corresponding path program 392 times [2021-06-12 15:35:56,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:56,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071263663] [2021-06-12 15:35:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:57,256 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 15:35:57,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:57,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071263663] [2021-06-12 15:35:57,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071263663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:57,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840543443] [2021-06-12 15:35:57,257 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 15:35:57,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:35:57,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:57,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:57,622 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 15:35:57,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840543443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:57,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:57,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:35:57,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742760516] [2021-06-12 15:35:57,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:35:57,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:57,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:35:57,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:35:57,623 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 15:35:58,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:35:58,802 INFO L93 Difference]: Finished difference Result 6506 states and 17167 transitions. [2021-06-12 15:35:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:35:58,802 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 15:35:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:35:58,808 INFO L225 Difference]: With dead ends: 6506 [2021-06-12 15:35:58,808 INFO L226 Difference]: Without dead ends: 6236 [2021-06-12 15:35:58,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 1187.7ms TimeCoverageRelationStatistics Valid=1681, Invalid=4961, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:35:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-12 15:35:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 5013. [2021-06-12 15:35:58,873 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 15:35:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14053 transitions. [2021-06-12 15:35:58,882 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14053 transitions. Word has length 170 [2021-06-12 15:35:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:35:58,882 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14053 transitions. [2021-06-12 15:35:58,882 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 15:35:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14053 transitions. [2021-06-12 15:35:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:35:58,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:35:58,887 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 15:35:59,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-12 15:35:59,087 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:35:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:35:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash 518598377, now seen corresponding path program 393 times [2021-06-12 15:35:59,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:35:59,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879945965] [2021-06-12 15:35:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:35:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:35:59,426 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 15:35:59,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:35:59,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879945965] [2021-06-12 15:35:59,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879945965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:59,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195374501] [2021-06-12 15:35:59,426 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 15:35:59,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:35:59,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:35:59,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:35:59,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:35:59,738 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 15:35:59,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195374501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:35:59,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:35:59,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:35:59,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224953355] [2021-06-12 15:35:59,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:35:59,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:35:59,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:35:59,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:35:59,739 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 15:36:01,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:01,127 INFO L93 Difference]: Finished difference Result 6531 states and 17292 transitions. [2021-06-12 15:36:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:36:01,127 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 15:36:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:01,133 INFO L225 Difference]: With dead ends: 6531 [2021-06-12 15:36:01,133 INFO L226 Difference]: Without dead ends: 6261 [2021-06-12 15:36:01,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1359.5ms TimeCoverageRelationStatistics Valid=1836, Invalid=5474, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 15:36:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-06-12 15:36:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 5088. [2021-06-12 15:36:01,189 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 15:36:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14278 transitions. [2021-06-12 15:36:01,196 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14278 transitions. Word has length 170 [2021-06-12 15:36:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:01,196 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14278 transitions. [2021-06-12 15:36:01,196 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 15:36:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14278 transitions. [2021-06-12 15:36:01,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:36:01,201 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:01,201 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 15:36:01,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-12 15:36:01,401 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash 89534071, now seen corresponding path program 394 times [2021-06-12 15:36:01,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:01,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695458115] [2021-06-12 15:36:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:01,717 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 15:36:01,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:01,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695458115] [2021-06-12 15:36:01,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695458115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:01,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348472147] [2021-06-12 15:36:01,718 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 15:36:01,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:36:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:01,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:36:01,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:01,992 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 15:36:01,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348472147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:01,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:01,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:36:01,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86530255] [2021-06-12 15:36:01,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:36:01,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:36:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:36:01,994 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 15:36:03,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:03,131 INFO L93 Difference]: Finished difference Result 6556 states and 17417 transitions. [2021-06-12 15:36:03,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:36:03,131 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 15:36:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:03,137 INFO L225 Difference]: With dead ends: 6556 [2021-06-12 15:36:03,137 INFO L226 Difference]: Without dead ends: 6286 [2021-06-12 15:36:03,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1147.1ms TimeCoverageRelationStatistics Valid=1822, Invalid=5150, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:36:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-06-12 15:36:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 5163. [2021-06-12 15:36:03,191 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 15:36:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14503 transitions. [2021-06-12 15:36:03,198 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14503 transitions. Word has length 170 [2021-06-12 15:36:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:03,199 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14503 transitions. [2021-06-12 15:36:03,199 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 15:36:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14503 transitions. [2021-06-12 15:36:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:36:03,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:03,203 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 15:36:03,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:03,404 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:03,404 INFO L82 PathProgramCache]: Analyzing trace with hash -596649113, now seen corresponding path program 395 times [2021-06-12 15:36:03,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:03,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293322281] [2021-06-12 15:36:03,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:03,744 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 15:36:03,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:03,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293322281] [2021-06-12 15:36:03,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293322281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:03,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177842802] [2021-06-12 15:36:03,744 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 15:36:03,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:36:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:03,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:36:03,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:04,035 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 15:36:04,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177842802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:04,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:04,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:36:04,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453248469] [2021-06-12 15:36:04,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:04,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:04,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:04,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:04,036 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 15:36:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:05,468 INFO L93 Difference]: Finished difference Result 6581 states and 17542 transitions. [2021-06-12 15:36:05,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:36:05,468 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 15:36:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:05,474 INFO L225 Difference]: With dead ends: 6581 [2021-06-12 15:36:05,474 INFO L226 Difference]: Without dead ends: 6311 [2021-06-12 15:36:05,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1392.6ms TimeCoverageRelationStatistics Valid=1985, Invalid=5671, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:36:05,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-12 15:36:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5238. [2021-06-12 15:36:05,534 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 15:36:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14728 transitions. [2021-06-12 15:36:05,543 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14728 transitions. Word has length 170 [2021-06-12 15:36:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:05,543 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14728 transitions. [2021-06-12 15:36:05,543 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 15:36:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14728 transitions. [2021-06-12 15:36:05,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:36:05,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:05,548 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 15:36:05,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-12 15:36:05,748 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:05,749 INFO L82 PathProgramCache]: Analyzing trace with hash -681683851, now seen corresponding path program 396 times [2021-06-12 15:36:05,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:05,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2613977] [2021-06-12 15:36:05,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:06,065 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 15:36:06,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:06,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2613977] [2021-06-12 15:36:06,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2613977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:06,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118470547] [2021-06-12 15:36:06,065 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 15:36:06,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:36:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:36:06,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:06,347 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 15:36:06,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118470547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:06,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:06,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:36:06,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654233254] [2021-06-12 15:36:06,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:36:06,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:06,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:36:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:36:06,348 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 15:36:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:07,551 INFO L93 Difference]: Finished difference Result 6606 states and 17667 transitions. [2021-06-12 15:36:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:36:07,551 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 15:36:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:07,559 INFO L225 Difference]: With dead ends: 6606 [2021-06-12 15:36:07,559 INFO L226 Difference]: Without dead ends: 6336 [2021-06-12 15:36:07,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1184.7ms TimeCoverageRelationStatistics Valid=1979, Invalid=5331, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 15:36:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-06-12 15:36:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5313. [2021-06-12 15:36:07,619 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 15:36:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 14953 transitions. [2021-06-12 15:36:07,626 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 14953 transitions. Word has length 170 [2021-06-12 15:36:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:07,627 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 14953 transitions. [2021-06-12 15:36:07,627 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 15:36:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 14953 transitions. [2021-06-12 15:36:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:36:07,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:07,631 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 15:36:07,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-12 15:36:07,845 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:07,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:07,845 INFO L82 PathProgramCache]: Analyzing trace with hash -749834907, now seen corresponding path program 397 times [2021-06-12 15:36:07,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:07,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386171973] [2021-06-12 15:36:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:08,164 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 15:36:08,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:08,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386171973] [2021-06-12 15:36:08,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386171973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:08,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113309541] [2021-06-12 15:36:08,165 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 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 15:36:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:08,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:36:08,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:08,443 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 15:36:08,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113309541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:08,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:08,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:36:08,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162788930] [2021-06-12 15:36:08,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:08,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:08,444 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 15:36:09,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:09,940 INFO L93 Difference]: Finished difference Result 6631 states and 17792 transitions. [2021-06-12 15:36:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:36:09,941 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 15:36:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:09,947 INFO L225 Difference]: With dead ends: 6631 [2021-06-12 15:36:09,947 INFO L226 Difference]: Without dead ends: 6361 [2021-06-12 15:36:09,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1457.6ms TimeCoverageRelationStatistics Valid=2150, Invalid=5860, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 15:36:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-12 15:36:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 5388. [2021-06-12 15:36:10,008 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 15:36:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 15178 transitions. [2021-06-12 15:36:10,016 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 15178 transitions. Word has length 170 [2021-06-12 15:36:10,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:10,016 INFO L482 AbstractCegarLoop]: Abstraction has 5388 states and 15178 transitions. [2021-06-12 15:36:10,017 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 15:36:10,017 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 15178 transitions. [2021-06-12 15:36:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:36:10,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:10,021 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 15:36:10,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:10,222 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:10,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:10,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2046803981, now seen corresponding path program 398 times [2021-06-12 15:36:10,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:10,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097237701] [2021-06-12 15:36:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:10,536 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 15:36:10,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097237701] [2021-06-12 15:36:10,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097237701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112267678] [2021-06-12 15:36:10,536 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 15:36:10,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:36:10,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:10,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:36:10,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:10,808 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 15:36:10,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112267678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:10,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:10,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:36:10,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119737515] [2021-06-12 15:36:10,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:36:10,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:10,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:36:10,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:36:10,809 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 15:36:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:12,053 INFO L93 Difference]: Finished difference Result 6656 states and 17917 transitions. [2021-06-12 15:36:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:36:12,053 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 15:36:12,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:12,060 INFO L225 Difference]: With dead ends: 6656 [2021-06-12 15:36:12,060 INFO L226 Difference]: Without dead ends: 6386 [2021-06-12 15:36:12,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1224.4ms TimeCoverageRelationStatistics Valid=2152, Invalid=5504, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:36:12,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-06-12 15:36:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5463. [2021-06-12 15:36:12,120 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 15:36:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 15403 transitions. [2021-06-12 15:36:12,128 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 15403 transitions. Word has length 170 [2021-06-12 15:36:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:12,129 INFO L482 AbstractCegarLoop]: Abstraction has 5463 states and 15403 transitions. [2021-06-12 15:36:12,129 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 15:36:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 15403 transitions. [2021-06-12 15:36:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:36:12,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:12,133 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 15:36:12,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:12,334 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:12,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1617050397, now seen corresponding path program 399 times [2021-06-12 15:36:12,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:12,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427991723] [2021-06-12 15:36:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:12,655 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 15:36:12,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:12,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427991723] [2021-06-12 15:36:12,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427991723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:12,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048262379] [2021-06-12 15:36:12,655 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 15:36:12,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:36:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:12,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:36:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:12,951 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 15:36:12,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048262379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:12,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:12,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:36:12,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827048073] [2021-06-12 15:36:12,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:12,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:12,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:12,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:12,952 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 15:36:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:14,484 INFO L93 Difference]: Finished difference Result 6741 states and 18207 transitions. [2021-06-12 15:36:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 15:36:14,485 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 15:36:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:14,491 INFO L225 Difference]: With dead ends: 6741 [2021-06-12 15:36:14,492 INFO L226 Difference]: Without dead ends: 6471 [2021-06-12 15:36:14,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 1496.4ms TimeCoverageRelationStatistics Valid=2331, Invalid=6041, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 15:36:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-12 15:36:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 5538. [2021-06-12 15:36:14,553 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 15:36:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 15648 transitions. [2021-06-12 15:36:14,561 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 15648 transitions. Word has length 170 [2021-06-12 15:36:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:14,561 INFO L482 AbstractCegarLoop]: Abstraction has 5538 states and 15648 transitions. [2021-06-12 15:36:14,561 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 15:36:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 15648 transitions. [2021-06-12 15:36:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:36:14,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:14,566 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 15:36:14,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:14,767 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:14,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1674784527, now seen corresponding path program 400 times [2021-06-12 15:36:14,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:14,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433109856] [2021-06-12 15:36:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:15,086 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 15:36:15,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:15,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433109856] [2021-06-12 15:36:15,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433109856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:15,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324896416] [2021-06-12 15:36:15,087 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 15:36:15,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:36:15,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:15,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:36:15,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:15,350 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 15:36:15,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324896416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:15,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:15,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-12 15:36:15,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772870136] [2021-06-12 15:36:15,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 15:36:15,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:15,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 15:36:15,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:36:15,351 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 15:36:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:16,629 INFO L93 Difference]: Finished difference Result 7508 states and 20381 transitions. [2021-06-12 15:36:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:36:16,629 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 15:36:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:16,637 INFO L225 Difference]: With dead ends: 7508 [2021-06-12 15:36:16,637 INFO L226 Difference]: Without dead ends: 7238 [2021-06-12 15:36:16,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 1247.2ms TimeCoverageRelationStatistics Valid=2342, Invalid=5668, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 15:36:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-06-12 15:36:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 5718. [2021-06-12 15:36:16,697 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 15:36:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 16207 transitions. [2021-06-12 15:36:16,705 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 16207 transitions. Word has length 170 [2021-06-12 15:36:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:16,705 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 16207 transitions. [2021-06-12 15:36:16,706 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 15:36:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 16207 transitions. [2021-06-12 15:36:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-12 15:36:16,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:16,710 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 15:36:16,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:16,911 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:16,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1652441277, now seen corresponding path program 401 times [2021-06-12 15:36:16,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:16,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156665452] [2021-06-12 15:36:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:17,233 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 15:36:17,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:17,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156665452] [2021-06-12 15:36:17,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156665452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:17,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738528257] [2021-06-12 15:36:17,233 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 15:36:17,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:36:17,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:17,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 15:36:17,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:17,517 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 15:36:17,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738528257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:17,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:17,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-12 15:36:17,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192987008] [2021-06-12 15:36:17,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:17,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:17,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:17,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:17,519 INFO L87 Difference]: Start difference. First operand 5718 states and 16207 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 15:36:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:19,098 INFO L93 Difference]: Finished difference Result 6995 states and 19081 transitions. [2021-06-12 15:36:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 15:36:19,099 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 15:36:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:19,106 INFO L225 Difference]: With dead ends: 6995 [2021-06-12 15:36:19,106 INFO L226 Difference]: Without dead ends: 6506 [2021-06-12 15:36:19,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 1582.5ms TimeCoverageRelationStatistics Valid=2531, Invalid=6211, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 15:36:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2021-06-12 15:36:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 3713. [2021-06-12 15:36:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3713 states, 3712 states have (on average 2.741918103448276) internal successors, (10178), 3712 states have internal predecessors, (10178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3713 states to 3713 states and 10178 transitions. [2021-06-12 15:36:19,157 INFO L78 Accepts]: Start accepts. Automaton has 3713 states and 10178 transitions. Word has length 170 [2021-06-12 15:36:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:19,157 INFO L482 AbstractCegarLoop]: Abstraction has 3713 states and 10178 transitions. [2021-06-12 15:36:19,157 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 15:36:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3713 states and 10178 transitions. [2021-06-12 15:36:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:19,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:19,161 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 15:36:19,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:19,361 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash 420129948, now seen corresponding path program 402 times [2021-06-12 15:36:19,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:19,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118396433] [2021-06-12 15:36:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:19,761 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 15:36:19,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:19,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118396433] [2021-06-12 15:36:19,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118396433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:19,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021018851] [2021-06-12 15:36:19,762 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 15:36:19,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:36:19,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:19,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:19,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:20,091 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 15:36:20,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021018851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:20,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:20,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:36:20,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331775516] [2021-06-12 15:36:20,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:20,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:20,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:20,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:20,092 INFO L87 Difference]: Start difference. First operand 3713 states and 10178 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:20,825 INFO L93 Difference]: Finished difference Result 5531 states and 14017 transitions. [2021-06-12 15:36:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:36:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:36:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:20,830 INFO L225 Difference]: With dead ends: 5531 [2021-06-12 15:36:20,831 INFO L226 Difference]: Without dead ends: 5261 [2021-06-12 15:36:20,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 889.9ms TimeCoverageRelationStatistics Valid=1223, Invalid=3333, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:36:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-06-12 15:36:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 3788. [2021-06-12 15:36:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 2.7470293108001056) internal successors, (10403), 3787 states have internal predecessors, (10403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 10403 transitions. [2021-06-12 15:36:20,875 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 10403 transitions. Word has length 175 [2021-06-12 15:36:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:20,875 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 10403 transitions. [2021-06-12 15:36:20,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 10403 transitions. [2021-06-12 15:36:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:20,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:20,879 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 15:36:21,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-12 15:36:21,079 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:21,079 INFO L82 PathProgramCache]: Analyzing trace with hash -520806004, now seen corresponding path program 403 times [2021-06-12 15:36:21,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:21,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558512902] [2021-06-12 15:36:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:21,497 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 15:36:21,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:21,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558512902] [2021-06-12 15:36:21,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558512902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:21,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099338151] [2021-06-12 15:36:21,497 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 15:36:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:21,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:21,803 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 15:36:21,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099338151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:21,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:21,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:21,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216020952] [2021-06-12 15:36:21,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:21,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:21,804 INFO L87 Difference]: Start difference. First operand 3788 states and 10403 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 15:36:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:22,594 INFO L93 Difference]: Finished difference Result 6251 states and 15532 transitions. [2021-06-12 15:36:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:36:22,594 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 15:36:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:22,600 INFO L225 Difference]: With dead ends: 6251 [2021-06-12 15:36:22,600 INFO L226 Difference]: Without dead ends: 5981 [2021-06-12 15:36:22,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 979.8ms TimeCoverageRelationStatistics Valid=1291, Invalid=3679, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:36:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5981 states. [2021-06-12 15:36:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5981 to 3863. [2021-06-12 15:36:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 2.7519419989642673) internal successors, (10628), 3862 states have internal predecessors, (10628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 10628 transitions. [2021-06-12 15:36:22,647 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 10628 transitions. Word has length 175 [2021-06-12 15:36:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:22,647 INFO L482 AbstractCegarLoop]: Abstraction has 3863 states and 10628 transitions. [2021-06-12 15:36:22,647 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 15:36:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 10628 transitions. [2021-06-12 15:36:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:22,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:22,650 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 15:36:22,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-12 15:36:22,851 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:22,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:22,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1110522778, now seen corresponding path program 404 times [2021-06-12 15:36:22,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:22,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987871082] [2021-06-12 15:36:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:23,242 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 15:36:23,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:23,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987871082] [2021-06-12 15:36:23,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987871082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:23,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102120903] [2021-06-12 15:36:23,242 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 15:36:23,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:36:23,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:23,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:23,529 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 15:36:23,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102120903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:23,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:23,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:36:23,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484522923] [2021-06-12 15:36:23,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:23,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:23,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:23,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:23,530 INFO L87 Difference]: Start difference. First operand 3863 states and 10628 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:24,292 INFO L93 Difference]: Finished difference Result 6281 states and 15667 transitions. [2021-06-12 15:36:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:36:24,292 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:36:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:24,297 INFO L225 Difference]: With dead ends: 6281 [2021-06-12 15:36:24,297 INFO L226 Difference]: Without dead ends: 6011 [2021-06-12 15:36:24,297 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 930.3ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 15:36:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-12 15:36:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3938. [2021-06-12 15:36:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 2.7566675133350267) internal successors, (10853), 3937 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 10853 transitions. [2021-06-12 15:36:24,341 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 10853 transitions. Word has length 175 [2021-06-12 15:36:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:24,341 INFO L482 AbstractCegarLoop]: Abstraction has 3938 states and 10853 transitions. [2021-06-12 15:36:24,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 10853 transitions. [2021-06-12 15:36:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:24,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:24,344 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 15:36:24,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:24,545 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:24,545 INFO L82 PathProgramCache]: Analyzing trace with hash 265034890, now seen corresponding path program 405 times [2021-06-12 15:36:24,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:24,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261140758] [2021-06-12 15:36:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:24,950 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 15:36:24,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:24,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261140758] [2021-06-12 15:36:24,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261140758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:24,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655713453] [2021-06-12 15:36:24,951 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 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 15:36:25,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:36:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:25,276 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 15:36:25,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655713453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:25,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:25,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:25,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388170285] [2021-06-12 15:36:25,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:25,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:25,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:25,277 INFO L87 Difference]: Start difference. First operand 3938 states and 10853 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 15:36:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:26,143 INFO L93 Difference]: Finished difference Result 6306 states and 15792 transitions. [2021-06-12 15:36:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:36:26,143 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 15:36:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:26,149 INFO L225 Difference]: With dead ends: 6306 [2021-06-12 15:36:26,149 INFO L226 Difference]: Without dead ends: 6036 [2021-06-12 15:36:26,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1007.0ms TimeCoverageRelationStatistics Valid=1303, Invalid=3953, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:36:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-12 15:36:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4013. [2021-06-12 15:36:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4013 states, 4012 states have (on average 2.7612163509471586) internal successors, (11078), 4012 states have internal predecessors, (11078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4013 states to 4013 states and 11078 transitions. [2021-06-12 15:36:26,220 INFO L78 Accepts]: Start accepts. Automaton has 4013 states and 11078 transitions. Word has length 175 [2021-06-12 15:36:26,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:26,220 INFO L482 AbstractCegarLoop]: Abstraction has 4013 states and 11078 transitions. [2021-06-12 15:36:26,220 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 15:36:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4013 states and 11078 transitions. [2021-06-12 15:36:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:26,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:26,223 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 15:36:26,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-12 15:36:26,424 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:26,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:26,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1640968168, now seen corresponding path program 406 times [2021-06-12 15:36:26,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:26,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670995517] [2021-06-12 15:36:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:26,804 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 15:36:26,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:26,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670995517] [2021-06-12 15:36:26,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670995517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:26,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736864256] [2021-06-12 15:36:26,804 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 15:36:26,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:36:26,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:26,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:26,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:27,095 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 15:36:27,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736864256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:27,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:27,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:36:27,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2905326] [2021-06-12 15:36:27,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:27,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:27,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:27,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:27,096 INFO L87 Difference]: Start difference. First operand 4013 states and 11078 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:27,919 INFO L93 Difference]: Finished difference Result 6331 states and 15917 transitions. [2021-06-12 15:36:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:36:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:36:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:27,925 INFO L225 Difference]: With dead ends: 6331 [2021-06-12 15:36:27,925 INFO L226 Difference]: Without dead ends: 6061 [2021-06-12 15:36:27,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 935.0ms TimeCoverageRelationStatistics Valid=1307, Invalid=3949, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:36:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-12 15:36:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4088. [2021-06-12 15:36:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4087 states have (on average 2.7655982383166138) internal successors, (11303), 4087 states have internal predecessors, (11303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 11303 transitions. [2021-06-12 15:36:27,977 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 11303 transitions. Word has length 175 [2021-06-12 15:36:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:27,977 INFO L482 AbstractCegarLoop]: Abstraction has 4088 states and 11303 transitions. [2021-06-12 15:36:27,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 11303 transitions. [2021-06-12 15:36:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:27,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:27,981 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 15:36:28,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-12 15:36:28,181 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:28,182 INFO L82 PathProgramCache]: Analyzing trace with hash -757916408, now seen corresponding path program 407 times [2021-06-12 15:36:28,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:28,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084386267] [2021-06-12 15:36:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:28,599 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 15:36:28,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:28,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084386267] [2021-06-12 15:36:28,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084386267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:28,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493266252] [2021-06-12 15:36:28,599 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 15:36:28,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:36:28,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:28,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:28,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:28,911 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 15:36:28,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493266252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:28,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:28,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:28,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356399465] [2021-06-12 15:36:28,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:28,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:28,912 INFO L87 Difference]: Start difference. First operand 4088 states and 11303 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 15:36:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:29,825 INFO L93 Difference]: Finished difference Result 6356 states and 16042 transitions. [2021-06-12 15:36:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:36:29,825 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 15:36:29,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:29,831 INFO L225 Difference]: With dead ends: 6356 [2021-06-12 15:36:29,831 INFO L226 Difference]: Without dead ends: 6086 [2021-06-12 15:36:29,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1069.7ms TimeCoverageRelationStatistics Valid=1331, Invalid=4219, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:36:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-12 15:36:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4163. [2021-06-12 15:36:29,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4163 states, 4162 states have (on average 2.7698222008649687) internal successors, (11528), 4162 states have internal predecessors, (11528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 11528 transitions. [2021-06-12 15:36:29,883 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 11528 transitions. Word has length 175 [2021-06-12 15:36:29,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:29,883 INFO L482 AbstractCegarLoop]: Abstraction has 4163 states and 11528 transitions. [2021-06-12 15:36:29,883 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 15:36:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 11528 transitions. [2021-06-12 15:36:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:29,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:29,887 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 15:36:30,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-12 15:36:30,105 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:30,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1644841494, now seen corresponding path program 408 times [2021-06-12 15:36:30,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:30,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953306185] [2021-06-12 15:36:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:30,474 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 15:36:30,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953306185] [2021-06-12 15:36:30,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953306185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756199313] [2021-06-12 15:36:30,475 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 15:36:30,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:36:30,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:30,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:30,798 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 15:36:30,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756199313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:30,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:30,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:36:30,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137075689] [2021-06-12 15:36:30,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:30,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:30,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:30,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:30,799 INFO L87 Difference]: Start difference. First operand 4163 states and 11528 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:31,687 INFO L93 Difference]: Finished difference Result 6381 states and 16167 transitions. [2021-06-12 15:36:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:36:31,688 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:36:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:31,694 INFO L225 Difference]: With dead ends: 6381 [2021-06-12 15:36:31,694 INFO L226 Difference]: Without dead ends: 6111 [2021-06-12 15:36:31,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 957.9ms TimeCoverageRelationStatistics Valid=1349, Invalid=4201, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:36:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-12 15:36:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4238. [2021-06-12 15:36:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4238 states, 4237 states have (on average 2.773896624970498) internal successors, (11753), 4237 states have internal predecessors, (11753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4238 states to 4238 states and 11753 transitions. [2021-06-12 15:36:31,748 INFO L78 Accepts]: Start accepts. Automaton has 4238 states and 11753 transitions. Word has length 175 [2021-06-12 15:36:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:31,748 INFO L482 AbstractCegarLoop]: Abstraction has 4238 states and 11753 transitions. [2021-06-12 15:36:31,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4238 states and 11753 transitions. [2021-06-12 15:36:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:31,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:31,752 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 15:36:31,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-12 15:36:31,953 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:31,953 INFO L82 PathProgramCache]: Analyzing trace with hash -808779002, now seen corresponding path program 409 times [2021-06-12 15:36:31,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:31,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129582204] [2021-06-12 15:36:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:32,336 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 15:36:32,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:32,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129582204] [2021-06-12 15:36:32,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129582204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:32,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465650340] [2021-06-12 15:36:32,337 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 15:36:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:32,665 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 15:36:32,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465650340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:32,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:32,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:32,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443500227] [2021-06-12 15:36:32,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:32,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:32,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:32,666 INFO L87 Difference]: Start difference. First operand 4238 states and 11753 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 15:36:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:33,652 INFO L93 Difference]: Finished difference Result 6406 states and 16292 transitions. [2021-06-12 15:36:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:36:33,652 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 15:36:33,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:33,658 INFO L225 Difference]: With dead ends: 6406 [2021-06-12 15:36:33,658 INFO L226 Difference]: Without dead ends: 6136 [2021-06-12 15:36:33,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 1094.4ms TimeCoverageRelationStatistics Valid=1375, Invalid=4477, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:36:33,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-12 15:36:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4313. [2021-06-12 15:36:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4313 states, 4312 states have (on average 2.777829313543599) internal successors, (11978), 4312 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4313 states to 4313 states and 11978 transitions. [2021-06-12 15:36:33,711 INFO L78 Accepts]: Start accepts. Automaton has 4313 states and 11978 transitions. Word has length 175 [2021-06-12 15:36:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:33,711 INFO L482 AbstractCegarLoop]: Abstraction has 4313 states and 11978 transitions. [2021-06-12 15:36:33,711 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 15:36:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4313 states and 11978 transitions. [2021-06-12 15:36:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:33,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:33,715 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 15:36:33,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:33,916 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash 72780180, now seen corresponding path program 410 times [2021-06-12 15:36:33,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:33,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049605404] [2021-06-12 15:36:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:34,292 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 15:36:34,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:34,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049605404] [2021-06-12 15:36:34,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049605404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:34,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884114060] [2021-06-12 15:36:34,293 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 15:36:34,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:36:34,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:34,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:34,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:34,582 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 15:36:34,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884114060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:34,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:34,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:36:34,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427432943] [2021-06-12 15:36:34,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:34,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:34,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:34,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:34,583 INFO L87 Difference]: Start difference. First operand 4313 states and 11978 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:35,536 INFO L93 Difference]: Finished difference Result 6431 states and 16417 transitions. [2021-06-12 15:36:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:36:35,536 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:36:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:35,542 INFO L225 Difference]: With dead ends: 6431 [2021-06-12 15:36:35,542 INFO L226 Difference]: Without dead ends: 6161 [2021-06-12 15:36:35,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1004.4ms TimeCoverageRelationStatistics Valid=1407, Invalid=4445, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:36:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-12 15:36:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4388. [2021-06-12 15:36:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 2.7816275359015274) internal successors, (12203), 4387 states have internal predecessors, (12203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 12203 transitions. [2021-06-12 15:36:35,598 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 12203 transitions. Word has length 175 [2021-06-12 15:36:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:35,599 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 12203 transitions. [2021-06-12 15:36:35,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 12203 transitions. [2021-06-12 15:36:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:35,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:35,602 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 15:36:35,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-12 15:36:35,803 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash -569594236, now seen corresponding path program 411 times [2021-06-12 15:36:35,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:35,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099768417] [2021-06-12 15:36:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:36,176 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 15:36:36,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:36,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099768417] [2021-06-12 15:36:36,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099768417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:36,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987147977] [2021-06-12 15:36:36,176 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 15:36:36,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:36:36,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:36,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:36,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:36,495 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 15:36:36,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987147977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:36,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:36,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:36,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24577215] [2021-06-12 15:36:36,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:36,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:36,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:36,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:36,496 INFO L87 Difference]: Start difference. First operand 4388 states and 12203 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 15:36:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:37,544 INFO L93 Difference]: Finished difference Result 6456 states and 16542 transitions. [2021-06-12 15:36:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:36:37,544 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 15:36:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:37,550 INFO L225 Difference]: With dead ends: 6456 [2021-06-12 15:36:37,550 INFO L226 Difference]: Without dead ends: 6186 [2021-06-12 15:36:37,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 1150.0ms TimeCoverageRelationStatistics Valid=1435, Invalid=4727, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:36:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-06-12 15:36:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4463. [2021-06-12 15:36:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 2.7852980726131777) internal successors, (12428), 4462 states have internal predecessors, (12428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 12428 transitions. [2021-06-12 15:36:37,609 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 12428 transitions. Word has length 175 [2021-06-12 15:36:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:37,609 INFO L482 AbstractCegarLoop]: Abstraction has 4463 states and 12428 transitions. [2021-06-12 15:36:37,609 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 15:36:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 12428 transitions. [2021-06-12 15:36:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:37,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:37,613 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 15:36:37,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-12 15:36:37,814 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:37,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:37,814 INFO L82 PathProgramCache]: Analyzing trace with hash -616141166, now seen corresponding path program 412 times [2021-06-12 15:36:37,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:37,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312329192] [2021-06-12 15:36:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:38,166 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 15:36:38,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:38,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312329192] [2021-06-12 15:36:38,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312329192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:38,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406466355] [2021-06-12 15:36:38,167 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 15:36:38,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:36:38,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:38,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:38,453 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 15:36:38,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406466355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:38,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:38,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:36:38,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622978999] [2021-06-12 15:36:38,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:38,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:38,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:38,454 INFO L87 Difference]: Start difference. First operand 4463 states and 12428 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:39,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:39,429 INFO L93 Difference]: Finished difference Result 6481 states and 16667 transitions. [2021-06-12 15:36:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:36:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:36:39,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:39,435 INFO L225 Difference]: With dead ends: 6481 [2021-06-12 15:36:39,436 INFO L226 Difference]: Without dead ends: 6211 [2021-06-12 15:36:39,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 1039.1ms TimeCoverageRelationStatistics Valid=1481, Invalid=4681, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:36:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-06-12 15:36:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4538. [2021-06-12 15:36:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4538 states, 4537 states have (on average 2.7888472558959667) internal successors, (12653), 4537 states have internal predecessors, (12653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4538 states to 4538 states and 12653 transitions. [2021-06-12 15:36:39,492 INFO L78 Accepts]: Start accepts. Automaton has 4538 states and 12653 transitions. Word has length 175 [2021-06-12 15:36:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:39,493 INFO L482 AbstractCegarLoop]: Abstraction has 4538 states and 12653 transitions. [2021-06-12 15:36:39,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4538 states and 12653 transitions. [2021-06-12 15:36:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:39,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:39,496 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 15:36:39,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-12 15:36:39,697 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1534525566, now seen corresponding path program 413 times [2021-06-12 15:36:39,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:39,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684372261] [2021-06-12 15:36:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:40,127 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 15:36:40,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:40,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684372261] [2021-06-12 15:36:40,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684372261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:40,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139646519] [2021-06-12 15:36:40,128 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 15:36:40,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:36:40,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:40,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:40,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:40,498 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 15:36:40,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139646519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:40,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:40,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:40,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027518702] [2021-06-12 15:36:40,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:40,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:40,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:40,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:40,499 INFO L87 Difference]: Start difference. First operand 4538 states and 12653 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 15:36:41,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:41,943 INFO L93 Difference]: Finished difference Result 6506 states and 16792 transitions. [2021-06-12 15:36:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:36:41,943 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 15:36:41,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:41,950 INFO L225 Difference]: With dead ends: 6506 [2021-06-12 15:36:41,950 INFO L226 Difference]: Without dead ends: 6236 [2021-06-12 15:36:41,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 1412.8ms TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:36:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-12 15:36:42,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 4613. [2021-06-12 15:36:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.7922810060711187) internal successors, (12878), 4612 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 12878 transitions. [2021-06-12 15:36:42,027 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 12878 transitions. Word has length 175 [2021-06-12 15:36:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:42,027 INFO L482 AbstractCegarLoop]: Abstraction has 4613 states and 12878 transitions. [2021-06-12 15:36:42,027 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 15:36:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 12878 transitions. [2021-06-12 15:36:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:42,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:42,033 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 15:36:42,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-12 15:36:42,255 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash 983750928, now seen corresponding path program 414 times [2021-06-12 15:36:42,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:42,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100604834] [2021-06-12 15:36:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:42,667 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 15:36:42,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:42,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100604834] [2021-06-12 15:36:42,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100604834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:42,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933010478] [2021-06-12 15:36:42,668 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 15:36:42,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:36:42,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:43,027 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 15:36:43,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933010478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:43,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:43,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:36:43,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242227130] [2021-06-12 15:36:43,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:43,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:43,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:43,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:43,029 INFO L87 Difference]: Start difference. First operand 4613 states and 12878 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:44,252 INFO L93 Difference]: Finished difference Result 6531 states and 16917 transitions. [2021-06-12 15:36:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:36:44,253 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:36:44,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:44,259 INFO L225 Difference]: With dead ends: 6531 [2021-06-12 15:36:44,259 INFO L226 Difference]: Without dead ends: 6261 [2021-06-12 15:36:44,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 1300.2ms TimeCoverageRelationStatistics Valid=1571, Invalid=4909, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:36:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-06-12 15:36:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 4688. [2021-06-12 15:36:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 2.795604864518882) internal successors, (13103), 4687 states have internal predecessors, (13103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:44,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 13103 transitions. [2021-06-12 15:36:44,336 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 13103 transitions. Word has length 175 [2021-06-12 15:36:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:44,336 INFO L482 AbstractCegarLoop]: Abstraction has 4688 states and 13103 transitions. [2021-06-12 15:36:44,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:44,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 13103 transitions. [2021-06-12 15:36:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:44,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:44,342 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 15:36:44,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:44,565 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1211574784, now seen corresponding path program 415 times [2021-06-12 15:36:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:44,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777758355] [2021-06-12 15:36:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:44,986 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 15:36:44,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:44,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777758355] [2021-06-12 15:36:44,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777758355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:44,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579208419] [2021-06-12 15:36:44,987 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 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 15:36:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:45,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:45,343 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 15:36:45,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579208419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:45,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:45,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:45,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3883426] [2021-06-12 15:36:45,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:45,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:45,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:45,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:45,344 INFO L87 Difference]: Start difference. First operand 4688 states and 13103 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 15:36:46,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:46,596 INFO L93 Difference]: Finished difference Result 6556 states and 17042 transitions. [2021-06-12 15:36:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:36:46,596 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 15:36:46,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:46,601 INFO L225 Difference]: With dead ends: 6556 [2021-06-12 15:36:46,601 INFO L226 Difference]: Without dead ends: 6286 [2021-06-12 15:36:46,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1328.5ms TimeCoverageRelationStatistics Valid=1603, Invalid=5203, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:36:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-06-12 15:36:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 4763. [2021-06-12 15:36:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4762 states have (on average 2.7988240235195296) internal successors, (13328), 4762 states have internal predecessors, (13328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 13328 transitions. [2021-06-12 15:36:46,658 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 13328 transitions. Word has length 175 [2021-06-12 15:36:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:46,658 INFO L482 AbstractCegarLoop]: Abstraction has 4763 states and 13328 transitions. [2021-06-12 15:36:46,658 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 15:36:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 13328 transitions. [2021-06-12 15:36:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:46,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:46,662 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 15:36:46,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-12 15:36:46,863 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:46,863 INFO L82 PathProgramCache]: Analyzing trace with hash 298625294, now seen corresponding path program 416 times [2021-06-12 15:36:46,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:46,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357313927] [2021-06-12 15:36:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:47,205 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 15:36:47,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:47,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357313927] [2021-06-12 15:36:47,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357313927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:47,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530509535] [2021-06-12 15:36:47,206 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 15:36:47,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:36:47,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:47,489 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 15:36:47,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530509535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:47,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:47,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:36:47,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780136895] [2021-06-12 15:36:47,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:47,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:47,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:47,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:47,490 INFO L87 Difference]: Start difference. First operand 4763 states and 13328 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:48,559 INFO L93 Difference]: Finished difference Result 6581 states and 17167 transitions. [2021-06-12 15:36:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:36:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:36:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:48,566 INFO L225 Difference]: With dead ends: 6581 [2021-06-12 15:36:48,566 INFO L226 Difference]: Without dead ends: 6311 [2021-06-12 15:36:48,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1106.8ms TimeCoverageRelationStatistics Valid=1677, Invalid=5129, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:36:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-12 15:36:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 4838. [2021-06-12 15:36:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 2.8019433533181726) internal successors, (13553), 4837 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 13553 transitions. [2021-06-12 15:36:48,626 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 13553 transitions. Word has length 175 [2021-06-12 15:36:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:48,626 INFO L482 AbstractCegarLoop]: Abstraction has 4838 states and 13553 transitions. [2021-06-12 15:36:48,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 13553 transitions. [2021-06-12 15:36:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:48,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:48,631 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 15:36:48,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:48,831 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:48,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:48,832 INFO L82 PathProgramCache]: Analyzing trace with hash 938283518, now seen corresponding path program 417 times [2021-06-12 15:36:48,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:48,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660319703] [2021-06-12 15:36:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:49,182 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 15:36:49,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:49,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660319703] [2021-06-12 15:36:49,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660319703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:49,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819467880] [2021-06-12 15:36:49,183 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 15:36:49,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:36:49,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:49,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:49,497 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 15:36:49,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819467880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:49,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:49,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:49,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307028934] [2021-06-12 15:36:49,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:49,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:49,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:49,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:49,499 INFO L87 Difference]: Start difference. First operand 4838 states and 13553 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 15:36:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:50,758 INFO L93 Difference]: Finished difference Result 6606 states and 17292 transitions. [2021-06-12 15:36:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:36:50,758 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 15:36:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:50,763 INFO L225 Difference]: With dead ends: 6606 [2021-06-12 15:36:50,763 INFO L226 Difference]: Without dead ends: 6336 [2021-06-12 15:36:50,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 1291.2ms TimeCoverageRelationStatistics Valid=1711, Invalid=5429, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:36:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-06-12 15:36:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 4913. [2021-06-12 15:36:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4913 states, 4912 states have (on average 2.804967426710098) internal successors, (13778), 4912 states have internal predecessors, (13778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:50,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 13778 transitions. [2021-06-12 15:36:50,822 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 13778 transitions. Word has length 175 [2021-06-12 15:36:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:50,822 INFO L482 AbstractCegarLoop]: Abstraction has 4913 states and 13778 transitions. [2021-06-12 15:36:50,822 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 15:36:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 13778 transitions. [2021-06-12 15:36:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:50,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:50,826 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 15:36:51,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-12 15:36:51,027 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash 163364492, now seen corresponding path program 418 times [2021-06-12 15:36:51,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:51,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363846885] [2021-06-12 15:36:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:51,365 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 15:36:51,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:51,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363846885] [2021-06-12 15:36:51,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363846885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:51,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028771894] [2021-06-12 15:36:51,365 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 15:36:51,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:36:51,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:51,646 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 15:36:51,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028771894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:51,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:51,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:36:51,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766436125] [2021-06-12 15:36:51,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:51,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:51,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:51,647 INFO L87 Difference]: Start difference. First operand 4913 states and 13778 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:52,751 INFO L93 Difference]: Finished difference Result 6631 states and 17417 transitions. [2021-06-12 15:36:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:36:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:36:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:52,757 INFO L225 Difference]: With dead ends: 6631 [2021-06-12 15:36:52,757 INFO L226 Difference]: Without dead ends: 6361 [2021-06-12 15:36:52,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 1140.9ms TimeCoverageRelationStatistics Valid=1799, Invalid=5341, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:36:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-12 15:36:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 4988. [2021-06-12 15:36:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 2.80790054140766) internal successors, (14003), 4987 states have internal predecessors, (14003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 14003 transitions. [2021-06-12 15:36:52,817 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 14003 transitions. Word has length 175 [2021-06-12 15:36:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:52,817 INFO L482 AbstractCegarLoop]: Abstraction has 4988 states and 14003 transitions. [2021-06-12 15:36:52,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 14003 transitions. [2021-06-12 15:36:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:52,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:52,821 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 15:36:53,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:53,022 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:53,022 INFO L82 PathProgramCache]: Analyzing trace with hash -290548868, now seen corresponding path program 419 times [2021-06-12 15:36:53,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:53,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899858483] [2021-06-12 15:36:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:53,362 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 15:36:53,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:53,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899858483] [2021-06-12 15:36:53,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899858483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:53,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195910469] [2021-06-12 15:36:53,363 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 15:36:53,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:36:53,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:53,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:53,665 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 15:36:53,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195910469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:53,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:53,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:53,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735622536] [2021-06-12 15:36:53,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:53,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:53,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:53,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:53,666 INFO L87 Difference]: Start difference. First operand 4988 states and 14003 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 15:36:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:54,981 INFO L93 Difference]: Finished difference Result 6656 states and 17542 transitions. [2021-06-12 15:36:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:36:54,982 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 15:36:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:54,987 INFO L225 Difference]: With dead ends: 6656 [2021-06-12 15:36:54,987 INFO L226 Difference]: Without dead ends: 6386 [2021-06-12 15:36:54,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 1331.5ms TimeCoverageRelationStatistics Valid=1835, Invalid=5647, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:36:54,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-06-12 15:36:55,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5063. [2021-06-12 15:36:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5063 states, 5062 states have (on average 2.8107467404188067) internal successors, (14228), 5062 states have internal predecessors, (14228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 14228 transitions. [2021-06-12 15:36:55,047 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 14228 transitions. Word has length 175 [2021-06-12 15:36:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:55,047 INFO L482 AbstractCegarLoop]: Abstraction has 5063 states and 14228 transitions. [2021-06-12 15:36:55,047 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 15:36:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 14228 transitions. [2021-06-12 15:36:55,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:55,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:55,051 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 15:36:55,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:55,252 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:55,252 INFO L82 PathProgramCache]: Analyzing trace with hash 587463050, now seen corresponding path program 420 times [2021-06-12 15:36:55,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:55,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965295358] [2021-06-12 15:36:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:55,587 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 15:36:55,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:55,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965295358] [2021-06-12 15:36:55,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965295358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:55,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330264940] [2021-06-12 15:36:55,588 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 15:36:55,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:36:55,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:36:55,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:55,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:55,879 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 15:36:55,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330264940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:55,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:55,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:36:55,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056865476] [2021-06-12 15:36:55,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:36:55,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:55,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:36:55,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:36:55,880 INFO L87 Difference]: Start difference. First operand 5063 states and 14228 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:57,034 INFO L93 Difference]: Finished difference Result 6681 states and 17667 transitions. [2021-06-12 15:36:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:36:57,035 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:36:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:57,040 INFO L225 Difference]: With dead ends: 6681 [2021-06-12 15:36:57,040 INFO L226 Difference]: Without dead ends: 6411 [2021-06-12 15:36:57,041 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 1170.6ms TimeCoverageRelationStatistics Valid=1937, Invalid=5545, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:36:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2021-06-12 15:36:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5138. [2021-06-12 15:36:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5138 states, 5137 states have (on average 2.813509830640452) internal successors, (14453), 5137 states have internal predecessors, (14453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5138 states to 5138 states and 14453 transitions. [2021-06-12 15:36:57,102 INFO L78 Accepts]: Start accepts. Automaton has 5138 states and 14453 transitions. Word has length 175 [2021-06-12 15:36:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:57,102 INFO L482 AbstractCegarLoop]: Abstraction has 5138 states and 14453 transitions. [2021-06-12 15:36:57,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:57,102 INFO L276 IsEmpty]: Start isEmpty. Operand 5138 states and 14453 transitions. [2021-06-12 15:36:57,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:57,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:57,107 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 15:36:57,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:57,307 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:57,307 INFO L82 PathProgramCache]: Analyzing trace with hash -312591750, now seen corresponding path program 421 times [2021-06-12 15:36:57,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:57,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883798379] [2021-06-12 15:36:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:57,648 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 15:36:57,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:57,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883798379] [2021-06-12 15:36:57,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883798379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:57,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576723672] [2021-06-12 15:36:57,649 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 15:36:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:57,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:36:57,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:36:57,942 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 15:36:57,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576723672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:57,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:36:57,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:36:57,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353682681] [2021-06-12 15:36:57,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:36:57,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:36:57,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:36:57,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:36:57,943 INFO L87 Difference]: Start difference. First operand 5138 states and 14453 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 15:36:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:36:59,316 INFO L93 Difference]: Finished difference Result 6706 states and 17792 transitions. [2021-06-12 15:36:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:36:59,316 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 15:36:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:36:59,323 INFO L225 Difference]: With dead ends: 6706 [2021-06-12 15:36:59,323 INFO L226 Difference]: Without dead ends: 6436 [2021-06-12 15:36:59,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 1359.1ms TimeCoverageRelationStatistics Valid=1975, Invalid=5857, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:36:59,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6436 states. [2021-06-12 15:36:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6436 to 5213. [2021-06-12 15:36:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 5212 states have (on average 2.816193399846508) internal successors, (14678), 5212 states have internal predecessors, (14678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:36:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 14678 transitions. [2021-06-12 15:36:59,393 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 14678 transitions. Word has length 175 [2021-06-12 15:36:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:36:59,394 INFO L482 AbstractCegarLoop]: Abstraction has 5213 states and 14678 transitions. [2021-06-12 15:36:59,394 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 15:36:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 14678 transitions. [2021-06-12 15:36:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:36:59,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:36:59,398 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 15:36:59,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:36:59,599 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:36:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:36:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash -741656056, now seen corresponding path program 422 times [2021-06-12 15:36:59,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:36:59,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219748558] [2021-06-12 15:36:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:36:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:36:59,930 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 15:36:59,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:36:59,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219748558] [2021-06-12 15:36:59,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219748558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:36:59,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472613514] [2021-06-12 15:36:59,930 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 15:36:59,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:36:59,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:00,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:37:00,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:00,198 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 15:37:00,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472613514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:00,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:00,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:37:00,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442547362] [2021-06-12 15:37:00,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:37:00,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:00,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:37:00,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:37:00,199 INFO L87 Difference]: Start difference. First operand 5213 states and 14678 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:01,394 INFO L93 Difference]: Finished difference Result 6731 states and 17917 transitions. [2021-06-12 15:37:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:37:01,394 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:37:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:01,400 INFO L225 Difference]: With dead ends: 6731 [2021-06-12 15:37:01,400 INFO L226 Difference]: Without dead ends: 6461 [2021-06-12 15:37:01,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1203.9ms TimeCoverageRelationStatistics Valid=2091, Invalid=5741, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:37:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6461 states. [2021-06-12 15:37:01,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6461 to 5288. [2021-06-12 15:37:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 2.818800832229998) internal successors, (14903), 5287 states have internal predecessors, (14903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 14903 transitions. [2021-06-12 15:37:01,464 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 14903 transitions. Word has length 175 [2021-06-12 15:37:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:01,465 INFO L482 AbstractCegarLoop]: Abstraction has 5288 states and 14903 transitions. [2021-06-12 15:37:01,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 14903 transitions. [2021-06-12 15:37:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:37:01,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:01,469 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 15:37:01,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:01,670 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:01,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:01,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1427839240, now seen corresponding path program 423 times [2021-06-12 15:37:01,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:01,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525968347] [2021-06-12 15:37:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:02,007 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 15:37:02,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:02,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525968347] [2021-06-12 15:37:02,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525968347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:02,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046753556] [2021-06-12 15:37:02,008 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 15:37:02,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:37:02,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:37:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:02,315 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 15:37:02,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046753556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:02,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:02,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:37:02,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959345309] [2021-06-12 15:37:02,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:02,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:02,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:02,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:02,316 INFO L87 Difference]: Start difference. First operand 5288 states and 14903 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 15:37:03,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:03,758 INFO L93 Difference]: Finished difference Result 6756 states and 18042 transitions. [2021-06-12 15:37:03,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:37:03,758 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 15:37:03,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:03,764 INFO L225 Difference]: With dead ends: 6756 [2021-06-12 15:37:03,764 INFO L226 Difference]: Without dead ends: 6486 [2021-06-12 15:37:03,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 1433.2ms TimeCoverageRelationStatistics Valid=2131, Invalid=6059, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:37:03,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6486 states. [2021-06-12 15:37:03,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6486 to 5363. [2021-06-12 15:37:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5362 states have (on average 2.8213353226408056) internal successors, (15128), 5362 states have internal predecessors, (15128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 15128 transitions. [2021-06-12 15:37:03,830 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 15128 transitions. Word has length 175 [2021-06-12 15:37:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:03,830 INFO L482 AbstractCegarLoop]: Abstraction has 5363 states and 15128 transitions. [2021-06-12 15:37:03,830 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 15:37:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 15128 transitions. [2021-06-12 15:37:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:37:03,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:03,835 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 15:37:04,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-12 15:37:04,035 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:04,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1512873978, now seen corresponding path program 424 times [2021-06-12 15:37:04,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:04,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058835752] [2021-06-12 15:37:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:04,369 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 15:37:04,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:04,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058835752] [2021-06-12 15:37:04,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058835752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:04,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072875570] [2021-06-12 15:37:04,369 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 15:37:04,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:37:04,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:37:04,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:04,645 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 15:37:04,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072875570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:04,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:04,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:37:04,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305476656] [2021-06-12 15:37:04,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:37:04,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:04,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:37:04,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:37:04,646 INFO L87 Difference]: Start difference. First operand 5363 states and 15128 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:05,880 INFO L93 Difference]: Finished difference Result 6781 states and 18167 transitions. [2021-06-12 15:37:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:37:05,881 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:37:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:05,887 INFO L225 Difference]: With dead ends: 6781 [2021-06-12 15:37:05,887 INFO L226 Difference]: Without dead ends: 6511 [2021-06-12 15:37:05,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1234.7ms TimeCoverageRelationStatistics Valid=2261, Invalid=5929, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:37:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6511 states. [2021-06-12 15:37:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6511 to 5438. [2021-06-12 15:37:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5438 states, 5437 states have (on average 2.823799889645025) internal successors, (15353), 5437 states have internal predecessors, (15353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 15353 transitions. [2021-06-12 15:37:05,954 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 15353 transitions. Word has length 175 [2021-06-12 15:37:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:05,954 INFO L482 AbstractCegarLoop]: Abstraction has 5438 states and 15353 transitions. [2021-06-12 15:37:05,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 15353 transitions. [2021-06-12 15:37:05,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:37:05,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:05,959 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 15:37:06,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-12 15:37:06,159 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:06,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1581025034, now seen corresponding path program 425 times [2021-06-12 15:37:06,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:06,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124649433] [2021-06-12 15:37:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:06,497 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 15:37:06,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:06,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124649433] [2021-06-12 15:37:06,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124649433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:06,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120200063] [2021-06-12 15:37:06,497 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 15:37:06,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 15:37:06,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:06,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:37:06,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:06,793 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 15:37:06,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120200063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:06,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:06,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:37:06,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311596648] [2021-06-12 15:37:06,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:06,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:06,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:06,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:06,794 INFO L87 Difference]: Start difference. First operand 5438 states and 15353 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 15:37:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:08,299 INFO L93 Difference]: Finished difference Result 6806 states and 18292 transitions. [2021-06-12 15:37:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 15:37:08,300 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 15:37:08,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:08,307 INFO L225 Difference]: With dead ends: 6806 [2021-06-12 15:37:08,307 INFO L226 Difference]: Without dead ends: 6536 [2021-06-12 15:37:08,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1482.5ms TimeCoverageRelationStatistics Valid=2303, Invalid=6253, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:37:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6536 states. [2021-06-12 15:37:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6536 to 5513. [2021-06-12 15:37:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 2.826197387518142) internal successors, (15578), 5512 states have internal predecessors, (15578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 15578 transitions. [2021-06-12 15:37:08,383 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 15578 transitions. Word has length 175 [2021-06-12 15:37:08,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:08,383 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 15578 transitions. [2021-06-12 15:37:08,383 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 15:37:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 15578 transitions. [2021-06-12 15:37:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:37:08,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:08,388 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 15:37:08,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 15:37:08,589 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:08,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1416973188, now seen corresponding path program 426 times [2021-06-12 15:37:08,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:08,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192796433] [2021-06-12 15:37:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:08,926 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 15:37:08,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:08,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192796433] [2021-06-12 15:37:08,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192796433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:08,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604863283] [2021-06-12 15:37:08,926 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 15:37:09,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 15:37:09,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:37:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:09,211 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 15:37:09,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604863283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:09,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:09,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:37:09,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354638239] [2021-06-12 15:37:09,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:37:09,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:09,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:37:09,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:37:09,212 INFO L87 Difference]: Start difference. First operand 5513 states and 15578 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:10,487 INFO L93 Difference]: Finished difference Result 6831 states and 18417 transitions. [2021-06-12 15:37:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 15:37:10,488 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:37:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:10,494 INFO L225 Difference]: With dead ends: 6831 [2021-06-12 15:37:10,495 INFO L226 Difference]: Without dead ends: 6561 [2021-06-12 15:37:10,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1277.4ms TimeCoverageRelationStatistics Valid=2447, Invalid=6109, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:37:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2021-06-12 15:37:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 5588. [2021-06-12 15:37:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5588 states, 5587 states have (on average 2.828530517272239) internal successors, (15803), 5587 states have internal predecessors, (15803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5588 states to 5588 states and 15803 transitions. [2021-06-12 15:37:10,564 INFO L78 Accepts]: Start accepts. Automaton has 5588 states and 15803 transitions. Word has length 175 [2021-06-12 15:37:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:10,564 INFO L482 AbstractCegarLoop]: Abstraction has 5588 states and 15803 transitions. [2021-06-12 15:37:10,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 5588 states and 15803 transitions. [2021-06-12 15:37:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:37:10,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:10,569 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 15:37:10,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:10,770 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:10,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1846726772, now seen corresponding path program 427 times [2021-06-12 15:37:10,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:10,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417521397] [2021-06-12 15:37:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:11,107 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 15:37:11,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:11,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417521397] [2021-06-12 15:37:11,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417521397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:11,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485028517] [2021-06-12 15:37:11,107 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 15:37:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:11,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:37:11,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:11,390 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 15:37:11,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485028517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:11,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:11,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-12 15:37:11,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965700259] [2021-06-12 15:37:11,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:11,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:11,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:11,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:11,391 INFO L87 Difference]: Start difference. First operand 5588 states and 15803 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 15:37:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:12,953 INFO L93 Difference]: Finished difference Result 6916 states and 18707 transitions. [2021-06-12 15:37:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 15:37:12,953 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 15:37:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:12,960 INFO L225 Difference]: With dead ends: 6916 [2021-06-12 15:37:12,961 INFO L226 Difference]: Without dead ends: 6646 [2021-06-12 15:37:12,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 1523.1ms TimeCoverageRelationStatistics Valid=2491, Invalid=6439, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:37:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6646 states. [2021-06-12 15:37:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6646 to 5663. [2021-06-12 15:37:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5663 states, 5662 states have (on average 2.834334157541505) internal successors, (16048), 5662 states have internal predecessors, (16048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5663 states to 5663 states and 16048 transitions. [2021-06-12 15:37:13,035 INFO L78 Accepts]: Start accepts. Automaton has 5663 states and 16048 transitions. Word has length 175 [2021-06-12 15:37:13,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:13,035 INFO L482 AbstractCegarLoop]: Abstraction has 5663 states and 16048 transitions. [2021-06-12 15:37:13,035 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 15:37:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5663 states and 16048 transitions. [2021-06-12 15:37:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:37:13,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:13,040 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 15:37:13,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-12 15:37:13,240 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1788992642, now seen corresponding path program 428 times [2021-06-12 15:37:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:13,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909356224] [2021-06-12 15:37:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:13,576 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 15:37:13,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:13,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909356224] [2021-06-12 15:37:13,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909356224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:13,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291450010] [2021-06-12 15:37:13,577 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 15:37:13,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:37:13,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:13,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:37:13,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:13,878 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 15:37:13,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291450010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:13,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:13,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 15:37:13,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055610918] [2021-06-12 15:37:13,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 15:37:13,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:13,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 15:37:13,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:37:13,879 INFO L87 Difference]: Start difference. First operand 5663 states and 16048 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:15,181 INFO L93 Difference]: Finished difference Result 7658 states and 20831 transitions. [2021-06-12 15:37:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 15:37:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 15:37:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:15,190 INFO L225 Difference]: With dead ends: 7658 [2021-06-12 15:37:15,190 INFO L226 Difference]: Without dead ends: 7388 [2021-06-12 15:37:15,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 1298.2ms TimeCoverageRelationStatistics Valid=2650, Invalid=6280, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:37:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2021-06-12 15:37:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 5843. [2021-06-12 15:37:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5843 states, 5842 states have (on average 2.842690859294762) internal successors, (16607), 5842 states have internal predecessors, (16607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5843 states to 5843 states and 16607 transitions. [2021-06-12 15:37:15,261 INFO L78 Accepts]: Start accepts. Automaton has 5843 states and 16607 transitions. Word has length 175 [2021-06-12 15:37:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:15,261 INFO L482 AbstractCegarLoop]: Abstraction has 5843 states and 16607 transitions. [2021-06-12 15:37:15,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 5843 states and 16607 transitions. [2021-06-12 15:37:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-12 15:37:15,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:15,266 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 15:37:15,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-12 15:37:15,466 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1811335892, now seen corresponding path program 429 times [2021-06-12 15:37:15,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:15,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248841481] [2021-06-12 15:37:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:15,808 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 15:37:15,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:15,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248841481] [2021-06-12 15:37:15,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248841481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:15,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305665491] [2021-06-12 15:37:15,808 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 15:37:15,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 15:37:15,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:15,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 15:37:15,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:16,157 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 15:37:16,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305665491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:16,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:16,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-12 15:37:16,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515261594] [2021-06-12 15:37:16,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:16,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:16,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:16,158 INFO L87 Difference]: Start difference. First operand 5843 states and 16607 transitions. Second operand has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:17,815 INFO L93 Difference]: Finished difference Result 7526 states and 20496 transitions. [2021-06-12 15:37:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 15:37:17,816 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have 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 15:37:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:17,824 INFO L225 Difference]: With dead ends: 7526 [2021-06-12 15:37:17,824 INFO L226 Difference]: Without dead ends: 6951 [2021-06-12 15:37:17,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 1642.1ms TimeCoverageRelationStatistics Valid=2786, Invalid=7314, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 15:37:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-12 15:37:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5878. [2021-06-12 15:37:17,883 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 15:37:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16683 transitions. [2021-06-12 15:37:17,892 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16683 transitions. Word has length 175 [2021-06-12 15:37:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:17,892 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16683 transitions. [2021-06-12 15:37:17,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:17,893 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16683 transitions. [2021-06-12 15:37:17,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:17,925 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:17,925 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 15:37:18,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-12 15:37:18,126 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:18,126 INFO L82 PathProgramCache]: Analyzing trace with hash -359446824, now seen corresponding path program 430 times [2021-06-12 15:37:18,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:18,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021033953] [2021-06-12 15:37:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:18,551 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 15:37:18,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:18,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021033953] [2021-06-12 15:37:18,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021033953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:18,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795137380] [2021-06-12 15:37:18,552 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 15:37:18,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:37:18,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:37:18,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:18,893 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 15:37:18,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795137380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:18,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:18,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2021-06-12 15:37:18,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607366577] [2021-06-12 15:37:18,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:37:18,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:18,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:37:18,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:37:18,894 INFO L87 Difference]: Start difference. First operand 5878 states and 16683 transitions. Second operand has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:19,727 INFO L93 Difference]: Finished difference Result 7268 states and 19783 transitions. [2021-06-12 15:37:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:37:19,728 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have 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 15:37:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:19,736 INFO L225 Difference]: With dead ends: 7268 [2021-06-12 15:37:19,736 INFO L226 Difference]: Without dead ends: 6934 [2021-06-12 15:37:19,736 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1031.9ms TimeCoverageRelationStatistics Valid=1485, Invalid=3917, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:37:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-06-12 15:37:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 5963. [2021-06-12 15:37:19,797 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 15:37:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 16853 transitions. [2021-06-12 15:37:19,806 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 16853 transitions. Word has length 180 [2021-06-12 15:37:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:19,806 INFO L482 AbstractCegarLoop]: Abstraction has 5963 states and 16853 transitions. [2021-06-12 15:37:19,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:37:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 16853 transitions. [2021-06-12 15:37:19,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:19,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:19,812 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 15:37:20,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:20,012 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:20,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1425719172, now seen corresponding path program 431 times [2021-06-12 15:37:20,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:20,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444226869] [2021-06-12 15:37:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:20,476 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 15:37:20,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:20,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444226869] [2021-06-12 15:37:20,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444226869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:20,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401805134] [2021-06-12 15:37:20,477 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 15:37:20,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:37:20,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:20,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:20,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:20,784 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 15:37:20,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401805134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:20,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:20,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:37:20,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152520741] [2021-06-12 15:37:20,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:20,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:20,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:20,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:20,785 INFO L87 Difference]: Start difference. First operand 5963 states and 16853 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:21,490 INFO L93 Difference]: Finished difference Result 8561 states and 22177 transitions. [2021-06-12 15:37:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:37:21,490 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:37:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:21,499 INFO L225 Difference]: With dead ends: 8561 [2021-06-12 15:37:21,500 INFO L226 Difference]: Without dead ends: 8291 [2021-06-12 15:37:21,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 914.5ms TimeCoverageRelationStatistics Valid=1286, Invalid=3270, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:37:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8291 states. [2021-06-12 15:37:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8291 to 5978. [2021-06-12 15:37:21,567 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 15:37:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:21,577 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:21,577 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:21,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:21,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:21,582 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 15:37:21,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-06-12 15:37:21,783 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:21,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1305889132, now seen corresponding path program 432 times [2021-06-12 15:37:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:21,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132007806] [2021-06-12 15:37:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:22,262 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 15:37:22,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:22,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132007806] [2021-06-12 15:37:22,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132007806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:22,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322564047] [2021-06-12 15:37:22,263 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 15:37:22,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:37:22,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:22,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:22,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:22,599 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 15:37:22,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322564047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:22,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:22,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:22,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757079431] [2021-06-12 15:37:22,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:22,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:22,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:22,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:22,600 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 15:37:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:23,393 INFO L93 Difference]: Finished difference Result 8446 states and 21947 transitions. [2021-06-12 15:37:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:37:23,393 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 15:37:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:23,402 INFO L225 Difference]: With dead ends: 8446 [2021-06-12 15:37:23,402 INFO L226 Difference]: Without dead ends: 8176 [2021-06-12 15:37:23,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1045.2ms TimeCoverageRelationStatistics Valid=1373, Invalid=3739, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:37:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-12 15:37:23,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 5978. [2021-06-12 15:37:23,466 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 15:37:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:23,475 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:23,475 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:23,475 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 15:37:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:23,481 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:23,481 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 15:37:23,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:23,682 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:23,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1296324102, now seen corresponding path program 433 times [2021-06-12 15:37:23,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:23,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581291030] [2021-06-12 15:37:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:24,131 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 15:37:24,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:24,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581291030] [2021-06-12 15:37:24,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581291030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727321708] [2021-06-12 15:37:24,132 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 15:37:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:24,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:24,430 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 15:37:24,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727321708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:24,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:24,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:37:24,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511805462] [2021-06-12 15:37:24,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:24,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:24,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:24,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:24,431 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:25,182 INFO L93 Difference]: Finished difference Result 8421 states and 21897 transitions. [2021-06-12 15:37:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:37:25,182 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:37:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:25,191 INFO L225 Difference]: With dead ends: 8421 [2021-06-12 15:37:25,191 INFO L226 Difference]: Without dead ends: 8151 [2021-06-12 15:37:25,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 967.8ms TimeCoverageRelationStatistics Valid=1281, Invalid=3549, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:37:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-12 15:37:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 5978. [2021-06-12 15:37:25,253 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 15:37:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:25,262 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:25,262 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:25,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:25,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:25,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:25,267 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 15:37:25,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-12 15:37:25,468 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:25,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2057707242, now seen corresponding path program 434 times [2021-06-12 15:37:25,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:25,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665110320] [2021-06-12 15:37:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:25,902 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 15:37:25,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:25,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665110320] [2021-06-12 15:37:25,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665110320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:25,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297723335] [2021-06-12 15:37:25,902 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 15:37:25,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:37:25,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:25,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:25,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:26,249 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 15:37:26,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297723335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:26,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:26,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:26,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268380811] [2021-06-12 15:37:26,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:26,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:26,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:26,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:26,250 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 15:37:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:27,124 INFO L93 Difference]: Finished difference Result 8371 states and 21797 transitions. [2021-06-12 15:37:27,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:37:27,124 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 15:37:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:27,133 INFO L225 Difference]: With dead ends: 8371 [2021-06-12 15:37:27,133 INFO L226 Difference]: Without dead ends: 8101 [2021-06-12 15:37:27,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1056.7ms TimeCoverageRelationStatistics Valid=1376, Invalid=4026, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:37:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-06-12 15:37:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 5978. [2021-06-12 15:37:27,197 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 15:37:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:27,206 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:27,206 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:27,206 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 15:37:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:27,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:27,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:27,211 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 15:37:27,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-12 15:37:27,412 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash -605931272, now seen corresponding path program 435 times [2021-06-12 15:37:27,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:27,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287662172] [2021-06-12 15:37:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:27,819 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 15:37:27,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:27,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287662172] [2021-06-12 15:37:27,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287662172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:27,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457840942] [2021-06-12 15:37:27,819 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 15:37:27,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:37:27,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:27,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:27,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:28,161 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 15:37:28,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457840942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:28,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:28,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:37:28,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648970209] [2021-06-12 15:37:28,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:28,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:28,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:28,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:28,162 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:29,036 INFO L93 Difference]: Finished difference Result 8321 states and 21697 transitions. [2021-06-12 15:37:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:37:29,036 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:37:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:29,045 INFO L225 Difference]: With dead ends: 8321 [2021-06-12 15:37:29,046 INFO L226 Difference]: Without dead ends: 8051 [2021-06-12 15:37:29,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 969.8ms TimeCoverageRelationStatistics Valid=1292, Invalid=3820, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:37:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-12 15:37:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 5978. [2021-06-12 15:37:29,109 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 15:37:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:29,119 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:29,119 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:29,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:29,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:29,124 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 15:37:29,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-12 15:37:29,324 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:29,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1451419160, now seen corresponding path program 436 times [2021-06-12 15:37:29,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:29,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553484273] [2021-06-12 15:37:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:29,757 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 15:37:29,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:29,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553484273] [2021-06-12 15:37:29,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553484273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:29,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386748940] [2021-06-12 15:37:29,757 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 15:37:29,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:37:29,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:29,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:30,104 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 15:37:30,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386748940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:30,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:30,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:30,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059131595] [2021-06-12 15:37:30,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:30,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:30,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:30,105 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 15:37:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:31,093 INFO L93 Difference]: Finished difference Result 8271 states and 21597 transitions. [2021-06-12 15:37:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:37:31,093 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 15:37:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:31,102 INFO L225 Difference]: With dead ends: 8271 [2021-06-12 15:37:31,102 INFO L226 Difference]: Without dead ends: 8001 [2021-06-12 15:37:31,103 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1103.7ms TimeCoverageRelationStatistics Valid=1395, Invalid=4305, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:37:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-06-12 15:37:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 5978. [2021-06-12 15:37:31,166 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 15:37:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:31,175 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:31,175 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:31,175 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 15:37:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:31,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:31,181 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 15:37:31,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-12 15:37:31,381 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash 937545078, now seen corresponding path program 437 times [2021-06-12 15:37:31,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:31,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756223287] [2021-06-12 15:37:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:31,794 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 15:37:31,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756223287] [2021-06-12 15:37:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756223287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391665115] [2021-06-12 15:37:31,795 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 15:37:31,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:37:31,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:31,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:32,129 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 15:37:32,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391665115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:32,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:32,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:37:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468031423] [2021-06-12 15:37:32,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:32,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:32,130 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:33,049 INFO L93 Difference]: Finished difference Result 8221 states and 21497 transitions. [2021-06-12 15:37:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:37:33,050 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:37:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:33,058 INFO L225 Difference]: With dead ends: 8221 [2021-06-12 15:37:33,059 INFO L226 Difference]: Without dead ends: 7951 [2021-06-12 15:37:33,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1003.2ms TimeCoverageRelationStatistics Valid=1319, Invalid=4083, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 15:37:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-12 15:37:33,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 5978. [2021-06-12 15:37:33,121 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 15:37:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:33,129 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:33,129 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:33,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:33,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:33,135 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 15:37:33,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-12 15:37:33,335 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:33,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1820596838, now seen corresponding path program 438 times [2021-06-12 15:37:33,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:33,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208482065] [2021-06-12 15:37:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:33,751 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 15:37:33,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:33,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208482065] [2021-06-12 15:37:33,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208482065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:33,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218269293] [2021-06-12 15:37:33,751 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 15:37:33,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:37:33,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:33,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:33,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:34,126 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 15:37:34,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218269293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:34,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:34,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:34,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973876913] [2021-06-12 15:37:34,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:34,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:34,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:34,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:34,127 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 15:37:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:35,123 INFO L93 Difference]: Finished difference Result 8171 states and 21397 transitions. [2021-06-12 15:37:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:37:35,123 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 15:37:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:35,132 INFO L225 Difference]: With dead ends: 8171 [2021-06-12 15:37:35,132 INFO L226 Difference]: Without dead ends: 7901 [2021-06-12 15:37:35,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1146.2ms TimeCoverageRelationStatistics Valid=1430, Invalid=4576, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:37:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-06-12 15:37:35,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 5978. [2021-06-12 15:37:35,195 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 15:37:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:35,204 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:35,204 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:35,204 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 15:37:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:35,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:35,209 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 15:37:35,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:35,410 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:35,410 INFO L82 PathProgramCache]: Analyzing trace with hash -71612556, now seen corresponding path program 439 times [2021-06-12 15:37:35,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:35,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18262798] [2021-06-12 15:37:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:35,789 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 15:37:35,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:35,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18262798] [2021-06-12 15:37:35,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18262798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:35,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316753707] [2021-06-12 15:37:35,790 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 15:37:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:35,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:35,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:36,132 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 15:37:36,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316753707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:36,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:36,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:37:36,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828579511] [2021-06-12 15:37:36,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:36,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:36,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:36,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:36,133 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:37,098 INFO L93 Difference]: Finished difference Result 8121 states and 21297 transitions. [2021-06-12 15:37:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:37:37,099 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:37:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:37,107 INFO L225 Difference]: With dead ends: 8121 [2021-06-12 15:37:37,108 INFO L226 Difference]: Without dead ends: 7851 [2021-06-12 15:37:37,108 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1021.8ms TimeCoverageRelationStatistics Valid=1362, Invalid=4338, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 15:37:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-06-12 15:37:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 5978. [2021-06-12 15:37:37,171 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 15:37:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:37,180 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:37,180 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:37,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:37,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:37,186 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 15:37:37,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-12 15:37:37,386 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:37,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1769734244, now seen corresponding path program 440 times [2021-06-12 15:37:37,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:37,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127690621] [2021-06-12 15:37:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:37,787 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 15:37:37,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127690621] [2021-06-12 15:37:37,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127690621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926942597] [2021-06-12 15:37:37,788 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 15:37:37,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:37:37,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:37,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:38,111 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 15:37:38,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926942597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:38,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:38,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:38,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102185360] [2021-06-12 15:37:38,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:38,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:38,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:38,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:38,112 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 15:37:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:39,269 INFO L93 Difference]: Finished difference Result 8071 states and 21197 transitions. [2021-06-12 15:37:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:37:39,270 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 15:37:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:39,278 INFO L225 Difference]: With dead ends: 8071 [2021-06-12 15:37:39,278 INFO L226 Difference]: Without dead ends: 7801 [2021-06-12 15:37:39,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1214.8ms TimeCoverageRelationStatistics Valid=1481, Invalid=4839, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:37:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-06-12 15:37:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 5978. [2021-06-12 15:37:39,340 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 15:37:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:39,349 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:39,349 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:39,349 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 15:37:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:39,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:39,354 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 15:37:39,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-12 15:37:39,555 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:39,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1643673870, now seen corresponding path program 441 times [2021-06-12 15:37:39,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:39,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79472238] [2021-06-12 15:37:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:39,933 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 15:37:39,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:39,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79472238] [2021-06-12 15:37:39,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79472238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:39,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169682129] [2021-06-12 15:37:39,934 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 15:37:40,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:37:40,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:40,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:40,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:40,279 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 15:37:40,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169682129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:40,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:40,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:37:40,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486827691] [2021-06-12 15:37:40,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:40,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:40,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:40,280 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:41,247 INFO L93 Difference]: Finished difference Result 8021 states and 21097 transitions. [2021-06-12 15:37:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:37:41,248 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:37:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:41,256 INFO L225 Difference]: With dead ends: 8021 [2021-06-12 15:37:41,256 INFO L226 Difference]: Without dead ends: 7751 [2021-06-12 15:37:41,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1059.9ms TimeCoverageRelationStatistics Valid=1421, Invalid=4585, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 15:37:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-06-12 15:37:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 5978. [2021-06-12 15:37:41,319 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 15:37:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:41,328 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:41,329 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:41,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:41,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:41,334 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 15:37:41,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-12 15:37:41,534 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:41,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2008919010, now seen corresponding path program 442 times [2021-06-12 15:37:41,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:41,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956783195] [2021-06-12 15:37:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:41,926 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 15:37:41,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:41,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956783195] [2021-06-12 15:37:41,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956783195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:41,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263748136] [2021-06-12 15:37:41,926 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 15:37:41,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:37:41,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:42,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:42,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:42,239 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 15:37:42,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263748136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:42,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:42,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:42,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95501487] [2021-06-12 15:37:42,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:42,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:42,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:42,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:42,240 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 15:37:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:43,400 INFO L93 Difference]: Finished difference Result 7971 states and 20997 transitions. [2021-06-12 15:37:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:37:43,401 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 15:37:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:43,409 INFO L225 Difference]: With dead ends: 7971 [2021-06-12 15:37:43,409 INFO L226 Difference]: Without dead ends: 7701 [2021-06-12 15:37:43,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 1251.1ms TimeCoverageRelationStatistics Valid=1548, Invalid=5094, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:37:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-06-12 15:37:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 5978. [2021-06-12 15:37:43,473 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 15:37:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:43,482 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:43,482 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:43,482 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 15:37:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:43,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:43,487 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 15:37:43,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:43,688 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1962372080, now seen corresponding path program 443 times [2021-06-12 15:37:43,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:43,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79615394] [2021-06-12 15:37:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:44,056 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 15:37:44,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:44,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79615394] [2021-06-12 15:37:44,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79615394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:44,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363907094] [2021-06-12 15:37:44,056 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 15:37:44,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:37:44,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:44,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:44,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:44,351 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 15:37:44,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363907094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:44,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:44,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:37:44,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295636511] [2021-06-12 15:37:44,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:44,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:44,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:44,352 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:45,367 INFO L93 Difference]: Finished difference Result 7921 states and 20897 transitions. [2021-06-12 15:37:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:37:45,367 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:37:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:45,375 INFO L225 Difference]: With dead ends: 7921 [2021-06-12 15:37:45,375 INFO L226 Difference]: Without dead ends: 7651 [2021-06-12 15:37:45,376 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 1082.0ms TimeCoverageRelationStatistics Valid=1496, Invalid=4824, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 15:37:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-06-12 15:37:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 5978. [2021-06-12 15:37:45,438 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 15:37:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:45,447 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:45,447 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:45,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:45,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:45,452 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 15:37:45,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:45,653 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1043987680, now seen corresponding path program 444 times [2021-06-12 15:37:45,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:45,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844309798] [2021-06-12 15:37:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:46,031 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 15:37:46,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:46,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844309798] [2021-06-12 15:37:46,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844309798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:46,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905639153] [2021-06-12 15:37:46,032 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 15:37:46,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:37:46,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:46,357 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 15:37:46,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905639153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:46,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:46,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:46,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618314232] [2021-06-12 15:37:46,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:46,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:46,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:46,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:46,358 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 15:37:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:47,564 INFO L93 Difference]: Finished difference Result 7871 states and 20797 transitions. [2021-06-12 15:37:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:37:47,565 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 15:37:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:47,574 INFO L225 Difference]: With dead ends: 7871 [2021-06-12 15:37:47,574 INFO L226 Difference]: Without dead ends: 7601 [2021-06-12 15:37:47,574 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1299.9ms TimeCoverageRelationStatistics Valid=1631, Invalid=5341, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:37:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-06-12 15:37:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 5978. [2021-06-12 15:37:47,639 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 15:37:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:47,649 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:47,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:47,649 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:47,649 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 15:37:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:47,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:47,655 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 15:37:47,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-12 15:37:47,855 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:47,856 INFO L82 PathProgramCache]: Analyzing trace with hash -732703122, now seen corresponding path program 445 times [2021-06-12 15:37:47,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:47,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036581248] [2021-06-12 15:37:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:48,220 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 15:37:48,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:48,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036581248] [2021-06-12 15:37:48,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036581248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:48,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153424422] [2021-06-12 15:37:48,221 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 15:37:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:48,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:48,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:48,522 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 15:37:48,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153424422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:48,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:48,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:37:48,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544342719] [2021-06-12 15:37:48,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:48,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:48,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:48,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:48,524 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:49,611 INFO L93 Difference]: Finished difference Result 7821 states and 20697 transitions. [2021-06-12 15:37:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:37:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:37:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:49,620 INFO L225 Difference]: With dead ends: 7821 [2021-06-12 15:37:49,621 INFO L226 Difference]: Without dead ends: 7551 [2021-06-12 15:37:49,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1141.4ms TimeCoverageRelationStatistics Valid=1587, Invalid=5055, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 15:37:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-12 15:37:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 5978. [2021-06-12 15:37:49,683 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 15:37:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:49,692 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:49,692 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:49,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:49,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:49,698 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 15:37:49,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:49,898 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:49,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1366938462, now seen corresponding path program 446 times [2021-06-12 15:37:49,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:49,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374850988] [2021-06-12 15:37:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:50,270 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 15:37:50,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:50,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374850988] [2021-06-12 15:37:50,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374850988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:50,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097635089] [2021-06-12 15:37:50,271 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 15:37:50,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:37:50,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:50,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:50,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:50,579 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 15:37:50,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097635089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:50,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:50,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:50,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607452526] [2021-06-12 15:37:50,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:50,581 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 15:37:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:51,868 INFO L93 Difference]: Finished difference Result 7771 states and 20597 transitions. [2021-06-12 15:37:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:37:51,868 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 15:37:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:51,877 INFO L225 Difference]: With dead ends: 7771 [2021-06-12 15:37:51,877 INFO L226 Difference]: Without dead ends: 7501 [2021-06-12 15:37:51,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1333.7ms TimeCoverageRelationStatistics Valid=1730, Invalid=5580, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 15:37:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-06-12 15:37:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 5978. [2021-06-12 15:37:51,939 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 15:37:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:51,948 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:51,948 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:51,948 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 15:37:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:51,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:51,954 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 15:37:52,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:52,154 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1417828756, now seen corresponding path program 447 times [2021-06-12 15:37:52,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:52,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709292969] [2021-06-12 15:37:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:52,513 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 15:37:52,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:52,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709292969] [2021-06-12 15:37:52,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709292969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:52,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122519043] [2021-06-12 15:37:52,513 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 15:37:52,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:37:52,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:52,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:52,848 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 15:37:52,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122519043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:52,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:52,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:37:52,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084121194] [2021-06-12 15:37:52,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:52,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:52,849 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:53,961 INFO L93 Difference]: Finished difference Result 7721 states and 20497 transitions. [2021-06-12 15:37:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:37:53,961 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:37:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:53,970 INFO L225 Difference]: With dead ends: 7721 [2021-06-12 15:37:53,970 INFO L226 Difference]: Without dead ends: 7451 [2021-06-12 15:37:53,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 1161.1ms TimeCoverageRelationStatistics Valid=1694, Invalid=5278, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 15:37:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-06-12 15:37:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 5978. [2021-06-12 15:37:54,034 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 15:37:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:54,043 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:54,043 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:54,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:54,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:54,049 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 15:37:54,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-12 15:37:54,249 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:54,250 INFO L82 PathProgramCache]: Analyzing trace with hash -778170532, now seen corresponding path program 448 times [2021-06-12 15:37:54,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:54,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664453923] [2021-06-12 15:37:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:54,614 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 15:37:54,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:54,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664453923] [2021-06-12 15:37:54,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664453923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:54,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517697269] [2021-06-12 15:37:54,614 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 15:37:54,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:37:54,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:54,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:54,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:54,952 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 15:37:54,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517697269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:54,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:54,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:54,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579233766] [2021-06-12 15:37:54,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:54,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:54,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:54,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:54,953 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 15:37:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:56,367 INFO L93 Difference]: Finished difference Result 7671 states and 20397 transitions. [2021-06-12 15:37:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:37:56,367 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 15:37:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:56,375 INFO L225 Difference]: With dead ends: 7671 [2021-06-12 15:37:56,376 INFO L226 Difference]: Without dead ends: 7401 [2021-06-12 15:37:56,376 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1387.1ms TimeCoverageRelationStatistics Valid=1845, Invalid=5811, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:37:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-06-12 15:37:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 5978. [2021-06-12 15:37:56,438 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 15:37:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:56,447 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:56,448 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:56,448 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 15:37:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:56,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:56,453 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 15:37:56,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-12 15:37:56,653 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:56,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1553089558, now seen corresponding path program 449 times [2021-06-12 15:37:56,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:56,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844965000] [2021-06-12 15:37:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:57,030 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 15:37:57,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:57,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844965000] [2021-06-12 15:37:57,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844965000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:57,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656529269] [2021-06-12 15:37:57,030 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 15:37:57,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:37:57,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:57,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:57,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:57,321 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 15:37:57,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656529269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:57,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:57,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:37:57,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876438458] [2021-06-12 15:37:57,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:37:57,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:57,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:37:57,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:37:57,322 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:37:58,542 INFO L93 Difference]: Finished difference Result 7621 states and 20297 transitions. [2021-06-12 15:37:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:37:58,542 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:37:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:37:58,551 INFO L225 Difference]: With dead ends: 7621 [2021-06-12 15:37:58,551 INFO L226 Difference]: Without dead ends: 7351 [2021-06-12 15:37:58,552 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1218.2ms TimeCoverageRelationStatistics Valid=1817, Invalid=5493, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 15:37:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-06-12 15:37:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 5978. [2021-06-12 15:37:58,612 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 15:37:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:37:58,621 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:37:58,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:37:58,621 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:37:58,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:37:58,622 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:37:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:37:58,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:37:58,627 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 15:37:58,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:37:58,827 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:37:58,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:37:58,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2007002918, now seen corresponding path program 450 times [2021-06-12 15:37:58,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:37:58,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994157313] [2021-06-12 15:37:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:37:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:37:59,219 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 15:37:59,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:37:59,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994157313] [2021-06-12 15:37:59,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994157313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:59,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030135645] [2021-06-12 15:37:59,220 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 15:37:59,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:37:59,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:37:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:37:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:37:59,537 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 15:37:59,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030135645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:37:59,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:37:59,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:37:59,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646777411] [2021-06-12 15:37:59,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:37:59,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:37:59,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:37:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:37:59,538 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 15:38:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:00,989 INFO L93 Difference]: Finished difference Result 7571 states and 20197 transitions. [2021-06-12 15:38:00,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:38:00,990 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 15:38:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:00,998 INFO L225 Difference]: With dead ends: 7571 [2021-06-12 15:38:00,998 INFO L226 Difference]: Without dead ends: 7301 [2021-06-12 15:38:00,999 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 1435.1ms TimeCoverageRelationStatistics Valid=1976, Invalid=6034, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 15:38:01,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-06-12 15:38:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 5978. [2021-06-12 15:38:01,083 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 15:38:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:38:01,091 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:38:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:01,092 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:38:01,092 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 15:38:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:38:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:38:01,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:01,097 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 15:38:01,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-12 15:38:01,297 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1128991000, now seen corresponding path program 451 times [2021-06-12 15:38:01,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:01,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338621136] [2021-06-12 15:38:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:01,653 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 15:38:01,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338621136] [2021-06-12 15:38:01,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338621136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105175466] [2021-06-12 15:38:01,654 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 15:38:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:01,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:38:01,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:01,946 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 15:38:01,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105175466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:01,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:01,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:38:01,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390531973] [2021-06-12 15:38:01,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:38:01,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:01,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:38:01,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:38:01,947 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:38:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:03,254 INFO L93 Difference]: Finished difference Result 7521 states and 20097 transitions. [2021-06-12 15:38:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:38:03,255 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:38:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:03,261 INFO L225 Difference]: With dead ends: 7521 [2021-06-12 15:38:03,261 INFO L226 Difference]: Without dead ends: 7251 [2021-06-12 15:38:03,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1230.7ms TimeCoverageRelationStatistics Valid=1956, Invalid=5700, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 15:38:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2021-06-12 15:38:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 5978. [2021-06-12 15:38:03,316 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 15:38:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:38:03,325 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:38:03,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:03,325 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:38:03,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:38:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:38:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:38:03,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:03,330 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 15:38:03,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-12 15:38:03,531 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:03,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2029045800, now seen corresponding path program 452 times [2021-06-12 15:38:03,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:03,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785572787] [2021-06-12 15:38:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:03,888 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 15:38:03,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:03,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785572787] [2021-06-12 15:38:03,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785572787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:03,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683237890] [2021-06-12 15:38:03,889 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 15:38:03,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:38:03,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:38:03,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:04,191 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 15:38:04,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683237890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:04,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:04,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:38:04,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689705654] [2021-06-12 15:38:04,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:04,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:04,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:04,192 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 15:38:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:05,740 INFO L93 Difference]: Finished difference Result 7471 states and 19997 transitions. [2021-06-12 15:38:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:38:05,740 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 15:38:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:05,747 INFO L225 Difference]: With dead ends: 7471 [2021-06-12 15:38:05,747 INFO L226 Difference]: Without dead ends: 7201 [2021-06-12 15:38:05,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 1521.5ms TimeCoverageRelationStatistics Valid=2123, Invalid=6249, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 15:38:05,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2021-06-12 15:38:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 5978. [2021-06-12 15:38:05,804 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 15:38:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:38:05,813 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:38:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:05,813 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:38:05,813 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 15:38:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:38:05,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:38:05,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:05,818 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 15:38:06,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:06,019 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1836857190, now seen corresponding path program 453 times [2021-06-12 15:38:06,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:06,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260645718] [2021-06-12 15:38:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:06,372 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 15:38:06,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:06,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260645718] [2021-06-12 15:38:06,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260645718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:06,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067285638] [2021-06-12 15:38:06,372 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 15:38:06,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:38:06,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:06,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:38:06,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:06,672 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 15:38:06,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067285638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:06,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:06,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:38:06,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632429045] [2021-06-12 15:38:06,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:38:06,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:38:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:38:06,673 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:38:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:07,972 INFO L93 Difference]: Finished difference Result 7421 states and 19897 transitions. [2021-06-12 15:38:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:38:07,972 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:38:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:07,980 INFO L225 Difference]: With dead ends: 7421 [2021-06-12 15:38:07,980 INFO L226 Difference]: Without dead ends: 7151 [2021-06-12 15:38:07,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1288.1ms TimeCoverageRelationStatistics Valid=2111, Invalid=5899, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 15:38:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-12 15:38:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5978. [2021-06-12 15:38:08,039 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 15:38:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:38:08,048 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:38:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:08,048 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:38:08,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:38:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:38:08,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:38:08,054 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:08,054 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 15:38:08,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable461 [2021-06-12 15:38:08,254 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:08,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:08,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1150674006, now seen corresponding path program 454 times [2021-06-12 15:38:08,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:08,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193248833] [2021-06-12 15:38:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:08,612 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 15:38:08,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:08,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193248833] [2021-06-12 15:38:08,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193248833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:08,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433143402] [2021-06-12 15:38:08,613 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 15:38:08,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:38:08,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:38:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:08,914 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 15:38:08,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433143402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:08,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:08,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:38:08,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641492902] [2021-06-12 15:38:08,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:08,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:08,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:08,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:08,915 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 15:38:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:10,504 INFO L93 Difference]: Finished difference Result 7371 states and 19797 transitions. [2021-06-12 15:38:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 15:38:10,504 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 15:38:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:10,511 INFO L225 Difference]: With dead ends: 7371 [2021-06-12 15:38:10,511 INFO L226 Difference]: Without dead ends: 7101 [2021-06-12 15:38:10,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 1566.4ms TimeCoverageRelationStatistics Valid=2286, Invalid=6456, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 15:38:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-06-12 15:38:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5978. [2021-06-12 15:38:10,570 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 15:38:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:38:10,580 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:38:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:10,580 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:38:10,580 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 15:38:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:38:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:38:10,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:10,585 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 15:38:10,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:10,786 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:10,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1065639268, now seen corresponding path program 455 times [2021-06-12 15:38:10,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:10,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108039496] [2021-06-12 15:38:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:11,137 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 15:38:11,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:11,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108039496] [2021-06-12 15:38:11,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108039496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:11,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701210523] [2021-06-12 15:38:11,138 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 15:38:11,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:38:11,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:11,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:38:11,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:11,423 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 15:38:11,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701210523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:11,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:11,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:38:11,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238129634] [2021-06-12 15:38:11,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:38:11,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:11,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:38:11,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:38:11,424 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:38:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:12,757 INFO L93 Difference]: Finished difference Result 7321 states and 19697 transitions. [2021-06-12 15:38:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:38:12,757 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:38:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:12,765 INFO L225 Difference]: With dead ends: 7321 [2021-06-12 15:38:12,765 INFO L226 Difference]: Without dead ends: 7051 [2021-06-12 15:38:12,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1330.8ms TimeCoverageRelationStatistics Valid=2282, Invalid=6090, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 15:38:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-06-12 15:38:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5978. [2021-06-12 15:38:12,824 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 15:38:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:38:12,833 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:38:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:12,833 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:38:12,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:38:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:38:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:38:12,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:12,838 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 15:38:13,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:13,038 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:13,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:13,038 INFO L82 PathProgramCache]: Analyzing trace with hash 997488212, now seen corresponding path program 456 times [2021-06-12 15:38:13,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:13,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332830279] [2021-06-12 15:38:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:13,393 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 15:38:13,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:13,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332830279] [2021-06-12 15:38:13,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332830279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:13,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560551339] [2021-06-12 15:38:13,393 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 15:38:13,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:38:13,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:13,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:38:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:13,703 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 15:38:13,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560551339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:13,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:13,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:38:13,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542863739] [2021-06-12 15:38:13,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:13,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:13,704 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 15:38:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:15,356 INFO L93 Difference]: Finished difference Result 7271 states and 19597 transitions. [2021-06-12 15:38:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 15:38:15,356 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 15:38:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:15,364 INFO L225 Difference]: With dead ends: 7271 [2021-06-12 15:38:15,364 INFO L226 Difference]: Without dead ends: 7001 [2021-06-12 15:38:15,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 1624.5ms TimeCoverageRelationStatistics Valid=2465, Invalid=6655, Unknown=0, NotChecked=0, Total=9120 [2021-06-12 15:38:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-12 15:38:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5978. [2021-06-12 15:38:15,425 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 15:38:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:38:15,434 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:38:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:15,434 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:38:15,434 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 15:38:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:38:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:38:15,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:15,439 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 15:38:15,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:15,640 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash -299480862, now seen corresponding path program 457 times [2021-06-12 15:38:15,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:15,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217447682] [2021-06-12 15:38:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:16,014 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 15:38:16,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:16,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217447682] [2021-06-12 15:38:16,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217447682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:16,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119705394] [2021-06-12 15:38:16,015 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 15:38:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:16,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:38:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:16,292 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 15:38:16,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119705394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:16,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:16,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:38:16,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871338197] [2021-06-12 15:38:16,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:38:16,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:16,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:38:16,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:38:16,293 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:38:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:17,687 INFO L93 Difference]: Finished difference Result 7221 states and 19497 transitions. [2021-06-12 15:38:17,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 15:38:17,688 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:38:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:17,695 INFO L225 Difference]: With dead ends: 7221 [2021-06-12 15:38:17,696 INFO L226 Difference]: Without dead ends: 6951 [2021-06-12 15:38:17,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 1374.3ms TimeCoverageRelationStatistics Valid=2469, Invalid=6273, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 15:38:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-12 15:38:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5978. [2021-06-12 15:38:17,756 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 15:38:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-12 15:38:17,765 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-12 15:38:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:17,765 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-12 15:38:17,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:38:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-12 15:38:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:38:17,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:17,770 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 15:38:17,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-12 15:38:17,971 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash 130272722, now seen corresponding path program 458 times [2021-06-12 15:38:17,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:17,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008819758] [2021-06-12 15:38:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:18,368 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 15:38:18,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:18,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008819758] [2021-06-12 15:38:18,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008819758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:18,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463359] [2021-06-12 15:38:18,369 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 15:38:18,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:38:18,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:18,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:38:18,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:18,670 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 15:38:18,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:18,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:18,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-12 15:38:18,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420662993] [2021-06-12 15:38:18,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:18,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:18,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:18,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:18,671 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 15:38:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:20,422 INFO L93 Difference]: Finished difference Result 7231 states and 19547 transitions. [2021-06-12 15:38:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 15:38:20,423 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 15:38:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:20,429 INFO L225 Difference]: With dead ends: 7231 [2021-06-12 15:38:20,430 INFO L226 Difference]: Without dead ends: 6961 [2021-06-12 15:38:20,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 1708.3ms TimeCoverageRelationStatistics Valid=2660, Invalid=6846, Unknown=0, NotChecked=0, Total=9506 [2021-06-12 15:38:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-06-12 15:38:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 5978. [2021-06-12 15:38:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.82549774134181) internal successors, (16888), 5977 states have internal predecessors, (16888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16888 transitions. [2021-06-12 15:38:20,498 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16888 transitions. Word has length 180 [2021-06-12 15:38:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:20,498 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16888 transitions. [2021-06-12 15:38:20,498 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 15:38:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16888 transitions. [2021-06-12 15:38:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:38:20,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:20,503 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 15:38:20,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-12 15:38:20,704 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:20,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:20,704 INFO L82 PathProgramCache]: Analyzing trace with hash 72538592, now seen corresponding path program 459 times [2021-06-12 15:38:20,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:20,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760416584] [2021-06-12 15:38:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:21,060 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 15:38:21,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:21,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760416584] [2021-06-12 15:38:21,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760416584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:21,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407719521] [2021-06-12 15:38:21,061 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 15:38:21,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:38:21,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:21,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:38:21,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:21,354 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 15:38:21,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407719521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:21,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:21,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-12 15:38:21,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016075807] [2021-06-12 15:38:21,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 15:38:21,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 15:38:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:38:21,355 INFO L87 Difference]: Start difference. First operand 5978 states and 16888 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:38:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:22,811 INFO L93 Difference]: Finished difference Result 7998 states and 21721 transitions. [2021-06-12 15:38:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 15:38:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 180 [2021-06-12 15:38:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:22,818 INFO L225 Difference]: With dead ends: 7998 [2021-06-12 15:38:22,818 INFO L226 Difference]: Without dead ends: 7728 [2021-06-12 15:38:22,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 1420.2ms TimeCoverageRelationStatistics Valid=2673, Invalid=6447, Unknown=0, NotChecked=0, Total=9120 [2021-06-12 15:38:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7728 states. [2021-06-12 15:38:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7728 to 6158. [2021-06-12 15:38:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6158 states, 6157 states have (on average 2.833685236316388) internal successors, (17447), 6157 states have internal predecessors, (17447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6158 states to 6158 states and 17447 transitions. [2021-06-12 15:38:22,890 INFO L78 Accepts]: Start accepts. Automaton has 6158 states and 17447 transitions. Word has length 180 [2021-06-12 15:38:22,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:22,890 INFO L482 AbstractCegarLoop]: Abstraction has 6158 states and 17447 transitions. [2021-06-12 15:38:22,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 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 15:38:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 6158 states and 17447 transitions. [2021-06-12 15:38:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-12 15:38:22,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:22,895 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 15:38:23,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:23,096 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:23,096 INFO L82 PathProgramCache]: Analyzing trace with hash 94881842, now seen corresponding path program 460 times [2021-06-12 15:38:23,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:23,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665116274] [2021-06-12 15:38:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:23,453 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 15:38:23,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:23,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665116274] [2021-06-12 15:38:23,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665116274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:23,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998968239] [2021-06-12 15:38:23,453 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 15:38:23,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:38:23,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 15:38:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:23,763 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 15:38:23,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998968239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:23,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:23,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-12 15:38:23,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646747725] [2021-06-12 15:38:23,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:23,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:23,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:23,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:23,764 INFO L87 Difference]: Start difference. First operand 6158 states and 17447 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 15:38:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:25,611 INFO L93 Difference]: Finished difference Result 7821 states and 21221 transitions. [2021-06-12 15:38:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 15:38:25,612 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 15:38:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:25,619 INFO L225 Difference]: With dead ends: 7821 [2021-06-12 15:38:25,619 INFO L226 Difference]: Without dead ends: 7246 [2021-06-12 15:38:25,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1808.2ms TimeCoverageRelationStatistics Valid=2964, Invalid=7748, Unknown=0, NotChecked=0, Total=10712 [2021-06-12 15:38:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7246 states. [2021-06-12 15:38:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7246 to 4003. [2021-06-12 15:38:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.7406296851574212) internal successors, (10968), 4002 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 10968 transitions. [2021-06-12 15:38:25,673 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 10968 transitions. Word has length 180 [2021-06-12 15:38:25,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:25,673 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 10968 transitions. [2021-06-12 15:38:25,673 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 15:38:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 10968 transitions. [2021-06-12 15:38:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:25,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:25,677 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 15:38:25,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-12 15:38:25,877 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:25,877 INFO L82 PathProgramCache]: Analyzing trace with hash -730740019, now seen corresponding path program 461 times [2021-06-12 15:38:25,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:25,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251190173] [2021-06-12 15:38:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:26,325 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 15:38:26,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251190173] [2021-06-12 15:38:26,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251190173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49275000] [2021-06-12 15:38:26,325 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 15:38:26,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:38:26,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:26,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:26,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:26,664 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 15:38:26,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49275000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:26,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:26,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:26,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319748800] [2021-06-12 15:38:26,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:26,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:26,665 INFO L87 Difference]: Start difference. First operand 4003 states and 10968 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 15:38:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:27,475 INFO L93 Difference]: Finished difference Result 5921 states and 15007 transitions. [2021-06-12 15:38:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:38:27,475 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 15:38:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:27,480 INFO L225 Difference]: With dead ends: 5921 [2021-06-12 15:38:27,481 INFO L226 Difference]: Without dead ends: 5651 [2021-06-12 15:38:27,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 991.0ms TimeCoverageRelationStatistics Valid=1382, Invalid=3730, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 15:38:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-12 15:38:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4078. [2021-06-12 15:38:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 2.745401030169242) internal successors, (11193), 4077 states have internal predecessors, (11193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 11193 transitions. [2021-06-12 15:38:27,529 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 11193 transitions. Word has length 185 [2021-06-12 15:38:27,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:27,529 INFO L482 AbstractCegarLoop]: Abstraction has 4078 states and 11193 transitions. [2021-06-12 15:38:27,529 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 15:38:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 11193 transitions. [2021-06-12 15:38:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:27,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:27,533 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 15:38:27,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-12 15:38:27,733 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2000868285, now seen corresponding path program 462 times [2021-06-12 15:38:27,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:27,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797693608] [2021-06-12 15:38:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:28,190 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 15:38:28,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:28,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797693608] [2021-06-12 15:38:28,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797693608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:28,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152899937] [2021-06-12 15:38:28,191 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 15:38:28,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:38:28,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:28,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:28,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:28,533 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 15:38:28,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152899937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:28,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:28,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:28,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982041177] [2021-06-12 15:38:28,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:28,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:28,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:28,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:28,535 INFO L87 Difference]: Start difference. First operand 4078 states and 11193 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 15:38:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:29,483 INFO L93 Difference]: Finished difference Result 6691 states and 16622 transitions. [2021-06-12 15:38:29,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:38:29,483 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 15:38:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:29,489 INFO L225 Difference]: With dead ends: 6691 [2021-06-12 15:38:29,490 INFO L226 Difference]: Without dead ends: 6421 [2021-06-12 15:38:29,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1076.5ms TimeCoverageRelationStatistics Valid=1453, Invalid=4097, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:38:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-06-12 15:38:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4153. [2021-06-12 15:38:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 2.75) internal successors, (11418), 4152 states have internal predecessors, (11418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 11418 transitions. [2021-06-12 15:38:29,543 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 11418 transitions. Word has length 185 [2021-06-12 15:38:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:29,544 INFO L482 AbstractCegarLoop]: Abstraction has 4153 states and 11418 transitions. [2021-06-12 15:38:29,544 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 15:38:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 11418 transitions. [2021-06-12 15:38:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:29,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:29,547 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 15:38:29,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:29,748 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:29,748 INFO L82 PathProgramCache]: Analyzing trace with hash -601344949, now seen corresponding path program 463 times [2021-06-12 15:38:29,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:29,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724869732] [2021-06-12 15:38:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:30,175 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 15:38:30,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:30,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724869732] [2021-06-12 15:38:30,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724869732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:30,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708920297] [2021-06-12 15:38:30,176 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 15:38:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:30,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:30,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:30,484 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 15:38:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708920297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:30,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:30,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645614396] [2021-06-12 15:38:30,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:30,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:30,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:30,485 INFO L87 Difference]: Start difference. First operand 4153 states and 11418 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 15:38:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:31,346 INFO L93 Difference]: Finished difference Result 6721 states and 16757 transitions. [2021-06-12 15:38:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:38:31,347 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 15:38:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:31,353 INFO L225 Difference]: With dead ends: 6721 [2021-06-12 15:38:31,353 INFO L226 Difference]: Without dead ends: 6451 [2021-06-12 15:38:31,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1021.1ms TimeCoverageRelationStatistics Valid=1441, Invalid=4109, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:38:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-12 15:38:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 4228. [2021-06-12 15:38:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.7544357700496804) internal successors, (11643), 4227 states have internal predecessors, (11643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11643 transitions. [2021-06-12 15:38:31,408 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11643 transitions. Word has length 185 [2021-06-12 15:38:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:31,408 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11643 transitions. [2021-06-12 15:38:31,408 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 15:38:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11643 transitions. [2021-06-12 15:38:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:31,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:31,412 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 15:38:31,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:31,612 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:31,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:31,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1542280901, now seen corresponding path program 464 times [2021-06-12 15:38:31,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:31,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514158009] [2021-06-12 15:38:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:32,077 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 15:38:32,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:32,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514158009] [2021-06-12 15:38:32,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514158009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:32,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778835087] [2021-06-12 15:38:32,077 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 15:38:32,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:38:32,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:32,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:32,399 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 15:38:32,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778835087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:32,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:32,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:32,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556105227] [2021-06-12 15:38:32,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:32,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:32,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:32,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:32,400 INFO L87 Difference]: Start difference. First operand 4228 states and 11643 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 15:38:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:33,439 INFO L93 Difference]: Finished difference Result 6746 states and 16882 transitions. [2021-06-12 15:38:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:38:33,439 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 15:38:33,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:33,445 INFO L225 Difference]: With dead ends: 6746 [2021-06-12 15:38:33,445 INFO L226 Difference]: Without dead ends: 6476 [2021-06-12 15:38:33,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1145.6ms TimeCoverageRelationStatistics Valid=1463, Invalid=4389, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:38:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2021-06-12 15:38:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 4303. [2021-06-12 15:38:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 2.758716875871688) internal successors, (11868), 4302 states have internal predecessors, (11868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 11868 transitions. [2021-06-12 15:38:33,497 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 11868 transitions. Word has length 185 [2021-06-12 15:38:33,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:33,497 INFO L482 AbstractCegarLoop]: Abstraction has 4303 states and 11868 transitions. [2021-06-12 15:38:33,497 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 15:38:33,497 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 11868 transitions. [2021-06-12 15:38:33,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:33,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:33,500 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 15:38:33,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:33,701 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:33,701 INFO L82 PathProgramCache]: Analyzing trace with hash 89047881, now seen corresponding path program 465 times [2021-06-12 15:38:33,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:33,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070488279] [2021-06-12 15:38:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:34,120 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 15:38:34,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:34,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070488279] [2021-06-12 15:38:34,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070488279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:34,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785500065] [2021-06-12 15:38:34,121 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 15:38:34,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:38:34,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:34,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:34,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:34,438 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 15:38:34,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785500065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:34,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:34,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:34,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072809356] [2021-06-12 15:38:34,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:34,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:34,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:34,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:34,439 INFO L87 Difference]: Start difference. First operand 4303 states and 11868 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 15:38:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:35,399 INFO L93 Difference]: Finished difference Result 6771 states and 17007 transitions. [2021-06-12 15:38:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:38:35,399 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 15:38:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:35,405 INFO L225 Difference]: With dead ends: 6771 [2021-06-12 15:38:35,405 INFO L226 Difference]: Without dead ends: 6501 [2021-06-12 15:38:35,406 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1037.7ms TimeCoverageRelationStatistics Valid=1465, Invalid=4387, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:38:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-06-12 15:38:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 4378. [2021-06-12 15:38:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 2.7628512679917754) internal successors, (12093), 4377 states have internal predecessors, (12093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 12093 transitions. [2021-06-12 15:38:35,462 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 12093 transitions. Word has length 185 [2021-06-12 15:38:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:35,462 INFO L482 AbstractCegarLoop]: Abstraction has 4378 states and 12093 transitions. [2021-06-12 15:38:35,462 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 15:38:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 12093 transitions. [2021-06-12 15:38:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:35,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:35,466 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 15:38:35,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:35,666 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:35,667 INFO L82 PathProgramCache]: Analyzing trace with hash -756440007, now seen corresponding path program 466 times [2021-06-12 15:38:35,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:35,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789893649] [2021-06-12 15:38:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:36,103 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 15:38:36,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:36,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789893649] [2021-06-12 15:38:36,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789893649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:36,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041098717] [2021-06-12 15:38:36,104 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 15:38:36,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:38:36,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:36,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:36,426 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 15:38:36,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041098717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:36,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:36,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:36,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055825635] [2021-06-12 15:38:36,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:36,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:36,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:36,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:36,427 INFO L87 Difference]: Start difference. First operand 4378 states and 12093 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 15:38:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:37,461 INFO L93 Difference]: Finished difference Result 6796 states and 17132 transitions. [2021-06-12 15:38:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:38:37,462 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 15:38:37,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:37,467 INFO L225 Difference]: With dead ends: 6796 [2021-06-12 15:38:37,467 INFO L226 Difference]: Without dead ends: 6526 [2021-06-12 15:38:37,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1152.6ms TimeCoverageRelationStatistics Valid=1489, Invalid=4673, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:38:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-06-12 15:38:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 4453. [2021-06-12 15:38:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 2.766846361185984) internal successors, (12318), 4452 states have internal predecessors, (12318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 12318 transitions. [2021-06-12 15:38:37,521 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 12318 transitions. Word has length 185 [2021-06-12 15:38:37,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:37,521 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 12318 transitions. [2021-06-12 15:38:37,521 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 15:38:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 12318 transitions. [2021-06-12 15:38:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:37,525 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:37,525 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 15:38:37,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-12 15:38:37,726 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:37,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1632524231, now seen corresponding path program 467 times [2021-06-12 15:38:37,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:37,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980007834] [2021-06-12 15:38:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:38,137 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 15:38:38,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:38,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980007834] [2021-06-12 15:38:38,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980007834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:38,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69177622] [2021-06-12 15:38:38,138 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 15:38:38,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:38:38,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:38,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:38,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:38,445 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 15:38:38,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69177622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:38,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:38,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:38,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748490098] [2021-06-12 15:38:38,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:38,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:38,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:38,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:38,446 INFO L87 Difference]: Start difference. First operand 4453 states and 12318 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 15:38:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:39,491 INFO L93 Difference]: Finished difference Result 6821 states and 17257 transitions. [2021-06-12 15:38:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:38:39,492 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 15:38:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:39,497 INFO L225 Difference]: With dead ends: 6821 [2021-06-12 15:38:39,498 INFO L226 Difference]: Without dead ends: 6551 [2021-06-12 15:38:39,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1079.4ms TimeCoverageRelationStatistics Valid=1505, Invalid=4657, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:38:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-06-12 15:38:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 4528. [2021-06-12 15:38:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 2.7707090788601723) internal successors, (12543), 4527 states have internal predecessors, (12543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 12543 transitions. [2021-06-12 15:38:39,559 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 12543 transitions. Word has length 185 [2021-06-12 15:38:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:39,559 INFO L482 AbstractCegarLoop]: Abstraction has 4528 states and 12543 transitions. [2021-06-12 15:38:39,559 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 15:38:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 12543 transitions. [2021-06-12 15:38:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:39,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:39,564 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 15:38:39,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-12 15:38:39,764 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:39,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1779391305, now seen corresponding path program 468 times [2021-06-12 15:38:39,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:39,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859620990] [2021-06-12 15:38:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:40,191 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 15:38:40,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:40,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859620990] [2021-06-12 15:38:40,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859620990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:40,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474361935] [2021-06-12 15:38:40,191 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 15:38:40,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:38:40,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:40,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:40,530 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 15:38:40,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474361935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:40,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:40,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:40,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593237074] [2021-06-12 15:38:40,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:40,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:40,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:40,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:40,531 INFO L87 Difference]: Start difference. First operand 4528 states and 12543 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 15:38:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:41,701 INFO L93 Difference]: Finished difference Result 6846 states and 17382 transitions. [2021-06-12 15:38:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:38:41,702 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 15:38:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:41,708 INFO L225 Difference]: With dead ends: 6846 [2021-06-12 15:38:41,708 INFO L226 Difference]: Without dead ends: 6576 [2021-06-12 15:38:41,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1209.7ms TimeCoverageRelationStatistics Valid=1531, Invalid=4949, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:38:41,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-06-12 15:38:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 4603. [2021-06-12 15:38:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 2.7744458930899607) internal successors, (12768), 4602 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 12768 transitions. [2021-06-12 15:38:41,765 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 12768 transitions. Word has length 185 [2021-06-12 15:38:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:41,765 INFO L482 AbstractCegarLoop]: Abstraction has 4603 states and 12768 transitions. [2021-06-12 15:38:41,765 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 15:38:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 12768 transitions. [2021-06-12 15:38:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:41,769 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:41,769 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 15:38:41,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-12 15:38:41,969 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:41,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:41,970 INFO L82 PathProgramCache]: Analyzing trace with hash 623366597, now seen corresponding path program 469 times [2021-06-12 15:38:41,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:41,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715119282] [2021-06-12 15:38:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:42,372 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 15:38:42,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:42,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715119282] [2021-06-12 15:38:42,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715119282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:42,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957545556] [2021-06-12 15:38:42,372 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 15:38:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:42,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:42,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:42,674 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 15:38:42,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957545556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:42,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:42,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:42,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932038227] [2021-06-12 15:38:42,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:42,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:42,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:42,675 INFO L87 Difference]: Start difference. First operand 4603 states and 12768 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 15:38:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:43,682 INFO L93 Difference]: Finished difference Result 6871 states and 17507 transitions. [2021-06-12 15:38:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:38:43,683 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 15:38:43,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:43,688 INFO L225 Difference]: With dead ends: 6871 [2021-06-12 15:38:43,688 INFO L226 Difference]: Without dead ends: 6601 [2021-06-12 15:38:43,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 1087.2ms TimeCoverageRelationStatistics Valid=1561, Invalid=4919, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:38:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-12 15:38:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 4678. [2021-06-12 15:38:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 2.7780628608082103) internal successors, (12993), 4677 states have internal predecessors, (12993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 12993 transitions. [2021-06-12 15:38:43,742 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 12993 transitions. Word has length 185 [2021-06-12 15:38:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:43,743 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 12993 transitions. [2021-06-12 15:38:43,743 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 15:38:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 12993 transitions. [2021-06-12 15:38:43,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:43,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:43,747 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 15:38:43,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-12 15:38:43,947 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:43,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:43,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1830253899, now seen corresponding path program 470 times [2021-06-12 15:38:43,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:43,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736968254] [2021-06-12 15:38:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:44,358 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 15:38:44,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:44,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736968254] [2021-06-12 15:38:44,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736968254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:44,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416102473] [2021-06-12 15:38:44,359 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 15:38:44,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:38:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:44,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:44,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:44,679 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 15:38:44,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416102473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:44,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:44,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:44,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459484030] [2021-06-12 15:38:44,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:44,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:44,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:44,680 INFO L87 Difference]: Start difference. First operand 4678 states and 12993 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 15:38:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:45,801 INFO L93 Difference]: Finished difference Result 6896 states and 17632 transitions. [2021-06-12 15:38:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:38:45,801 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 15:38:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:45,807 INFO L225 Difference]: With dead ends: 6896 [2021-06-12 15:38:45,807 INFO L226 Difference]: Without dead ends: 6626 [2021-06-12 15:38:45,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1245.4ms TimeCoverageRelationStatistics Valid=1589, Invalid=5217, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:38:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-06-12 15:38:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 4753. [2021-06-12 15:38:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4753 states, 4752 states have (on average 2.7815656565656566) internal successors, (13218), 4752 states have internal predecessors, (13218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 13218 transitions. [2021-06-12 15:38:45,864 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 13218 transitions. Word has length 185 [2021-06-12 15:38:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:45,864 INFO L482 AbstractCegarLoop]: Abstraction has 4753 states and 13218 transitions. [2021-06-12 15:38:45,864 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 15:38:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 13218 transitions. [2021-06-12 15:38:45,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:45,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:45,868 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 15:38:46,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-12 15:38:46,069 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash -948694717, now seen corresponding path program 471 times [2021-06-12 15:38:46,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:46,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186430555] [2021-06-12 15:38:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:46,461 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 15:38:46,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:46,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186430555] [2021-06-12 15:38:46,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186430555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:46,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088029938] [2021-06-12 15:38:46,462 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 15:38:46,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:38:46,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:46,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:46,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:46,778 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 15:38:46,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088029938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:46,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:46,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:46,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550693825] [2021-06-12 15:38:46,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:46,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:46,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:46,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:46,779 INFO L87 Difference]: Start difference. First operand 4753 states and 13218 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 15:38:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:47,796 INFO L93 Difference]: Finished difference Result 6921 states and 17757 transitions. [2021-06-12 15:38:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 15:38:47,796 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 15:38:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:47,802 INFO L225 Difference]: With dead ends: 6921 [2021-06-12 15:38:47,802 INFO L226 Difference]: Without dead ends: 6651 [2021-06-12 15:38:47,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1136.7ms TimeCoverageRelationStatistics Valid=1633, Invalid=5173, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:38:47,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-12 15:38:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 4828. [2021-06-12 15:38:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.7849596022374143) internal successors, (13443), 4827 states have internal predecessors, (13443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13443 transitions. [2021-06-12 15:38:47,859 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13443 transitions. Word has length 185 [2021-06-12 15:38:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:47,859 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13443 transitions. [2021-06-12 15:38:47,859 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 15:38:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13443 transitions. [2021-06-12 15:38:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:47,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:47,863 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 15:38:48,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:48,064 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:48,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1591069133, now seen corresponding path program 472 times [2021-06-12 15:38:48,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:48,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193649520] [2021-06-12 15:38:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:48,515 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 15:38:48,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:48,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193649520] [2021-06-12 15:38:48,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193649520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:48,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927726120] [2021-06-12 15:38:48,515 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 15:38:48,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:38:48,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:48,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:48,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:48,834 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 15:38:48,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927726120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:48,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:48,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:48,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120162250] [2021-06-12 15:38:48,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:48,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:48,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:48,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:48,836 INFO L87 Difference]: Start difference. First operand 4828 states and 13443 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 15:38:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:50,061 INFO L93 Difference]: Finished difference Result 6946 states and 17882 transitions. [2021-06-12 15:38:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 15:38:50,061 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 15:38:50,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:50,067 INFO L225 Difference]: With dead ends: 6946 [2021-06-12 15:38:50,067 INFO L226 Difference]: Without dead ends: 6676 [2021-06-12 15:38:50,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1336.1ms TimeCoverageRelationStatistics Valid=1663, Invalid=5477, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:38:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-06-12 15:38:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 4903. [2021-06-12 15:38:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4902 states have (on average 2.788249694002448) internal successors, (13668), 4902 states have internal predecessors, (13668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 13668 transitions. [2021-06-12 15:38:50,129 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 13668 transitions. Word has length 185 [2021-06-12 15:38:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:50,129 INFO L482 AbstractCegarLoop]: Abstraction has 4903 states and 13668 transitions. [2021-06-12 15:38:50,129 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 15:38:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 13668 transitions. [2021-06-12 15:38:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:50,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:50,133 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 15:38:50,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:50,334 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:50,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1637616063, now seen corresponding path program 473 times [2021-06-12 15:38:50,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:50,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013081072] [2021-06-12 15:38:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:50,723 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 15:38:50,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:50,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013081072] [2021-06-12 15:38:50,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013081072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:50,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135723026] [2021-06-12 15:38:50,724 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 15:38:50,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:38:50,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:50,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:50,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:51,028 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 15:38:51,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135723026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:51,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:51,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:51,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840530573] [2021-06-12 15:38:51,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:51,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:51,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:51,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:51,029 INFO L87 Difference]: Start difference. First operand 4903 states and 13668 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 15:38:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:52,137 INFO L93 Difference]: Finished difference Result 6971 states and 18007 transitions. [2021-06-12 15:38:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 15:38:52,138 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 15:38:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:52,144 INFO L225 Difference]: With dead ends: 6971 [2021-06-12 15:38:52,144 INFO L226 Difference]: Without dead ends: 6701 [2021-06-12 15:38:52,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 1160.5ms TimeCoverageRelationStatistics Valid=1721, Invalid=5419, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:38:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2021-06-12 15:38:52,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 4978. [2021-06-12 15:38:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4977 states have (on average 2.7914406268836647) internal successors, (13893), 4977 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 13893 transitions. [2021-06-12 15:38:52,207 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 13893 transitions. Word has length 185 [2021-06-12 15:38:52,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:52,207 INFO L482 AbstractCegarLoop]: Abstraction has 4978 states and 13893 transitions. [2021-06-12 15:38:52,207 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 15:38:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 13893 transitions. [2021-06-12 15:38:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:52,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:52,212 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 15:38:52,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:52,412 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:52,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1738966833, now seen corresponding path program 474 times [2021-06-12 15:38:52,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:52,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233768100] [2021-06-12 15:38:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:52,808 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 15:38:52,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:52,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233768100] [2021-06-12 15:38:52,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233768100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:52,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070785469] [2021-06-12 15:38:52,808 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 15:38:52,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:38:52,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:52,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:52,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:53,142 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 15:38:53,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070785469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:53,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:53,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:53,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639241354] [2021-06-12 15:38:53,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:53,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:53,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:53,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:53,143 INFO L87 Difference]: Start difference. First operand 4978 states and 13893 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 15:38:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:54,420 INFO L93 Difference]: Finished difference Result 6996 states and 18132 transitions. [2021-06-12 15:38:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 15:38:54,421 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 15:38:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:54,427 INFO L225 Difference]: With dead ends: 6996 [2021-06-12 15:38:54,427 INFO L226 Difference]: Without dead ends: 6726 [2021-06-12 15:38:54,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1346.7ms TimeCoverageRelationStatistics Valid=1753, Invalid=5729, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:38:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2021-06-12 15:38:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 5053. [2021-06-12 15:38:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 5052 states have (on average 2.794536817102138) internal successors, (14118), 5052 states have internal predecessors, (14118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 14118 transitions. [2021-06-12 15:38:54,490 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 14118 transitions. Word has length 185 [2021-06-12 15:38:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:54,490 INFO L482 AbstractCegarLoop]: Abstraction has 5053 states and 14118 transitions. [2021-06-12 15:38:54,490 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 15:38:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 14118 transitions. [2021-06-12 15:38:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:54,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:54,494 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 15:38:54,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:54,695 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:54,695 INFO L82 PathProgramCache]: Analyzing trace with hash -37723969, now seen corresponding path program 475 times [2021-06-12 15:38:54,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:54,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896333956] [2021-06-12 15:38:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:55,066 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 15:38:55,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:55,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896333956] [2021-06-12 15:38:55,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896333956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:55,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884639067] [2021-06-12 15:38:55,067 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 15:38:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:55,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:55,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:55,365 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 15:38:55,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884639067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:55,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:55,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:55,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719688465] [2021-06-12 15:38:55,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:55,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:55,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:55,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:55,366 INFO L87 Difference]: Start difference. First operand 5053 states and 14118 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 15:38:56,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:56,513 INFO L93 Difference]: Finished difference Result 7021 states and 18257 transitions. [2021-06-12 15:38:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 15:38:56,513 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 15:38:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:56,520 INFO L225 Difference]: With dead ends: 7021 [2021-06-12 15:38:56,520 INFO L226 Difference]: Without dead ends: 6751 [2021-06-12 15:38:56,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 1182.4ms TimeCoverageRelationStatistics Valid=1825, Invalid=5657, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 15:38:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-06-12 15:38:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 5128. [2021-06-12 15:38:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 2.7975424224692804) internal successors, (14343), 5127 states have internal predecessors, (14343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 14343 transitions. [2021-06-12 15:38:56,587 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 14343 transitions. Word has length 185 [2021-06-12 15:38:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:56,587 INFO L482 AbstractCegarLoop]: Abstraction has 5128 states and 14343 transitions. [2021-06-12 15:38:56,587 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 15:38:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 14343 transitions. [2021-06-12 15:38:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:56,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:56,592 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 15:38:56,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:56,792 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:56,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2061917615, now seen corresponding path program 476 times [2021-06-12 15:38:56,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:56,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030580157] [2021-06-12 15:38:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:57,177 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 15:38:57,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:57,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030580157] [2021-06-12 15:38:57,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030580157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:57,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540122815] [2021-06-12 15:38:57,177 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 15:38:57,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:38:57,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:57,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:57,493 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 15:38:57,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540122815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:57,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:57,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:38:57,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795364277] [2021-06-12 15:38:57,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:38:57,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:57,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:38:57,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:38:57,495 INFO L87 Difference]: Start difference. First operand 5128 states and 14343 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 15:38:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:38:58,825 INFO L93 Difference]: Finished difference Result 7046 states and 18382 transitions. [2021-06-12 15:38:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 15:38:58,825 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 15:38:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:38:58,832 INFO L225 Difference]: With dead ends: 7046 [2021-06-12 15:38:58,832 INFO L226 Difference]: Without dead ends: 6776 [2021-06-12 15:38:58,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1391.5ms TimeCoverageRelationStatistics Valid=1859, Invalid=5973, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:38:58,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2021-06-12 15:38:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 5203. [2021-06-12 15:38:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5203 states, 5202 states have (on average 2.800461361014994) internal successors, (14568), 5202 states have internal predecessors, (14568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:38:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 14568 transitions. [2021-06-12 15:38:58,897 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 14568 transitions. Word has length 185 [2021-06-12 15:38:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:38:58,897 INFO L482 AbstractCegarLoop]: Abstraction has 5203 states and 14568 transitions. [2021-06-12 15:38:58,897 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 15:38:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 14568 transitions. [2021-06-12 15:38:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:38:58,902 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:38:58,902 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 15:38:59,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:38:59,102 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:38:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:38:59,102 INFO L82 PathProgramCache]: Analyzing trace with hash -722849603, now seen corresponding path program 477 times [2021-06-12 15:38:59,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:38:59,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204479414] [2021-06-12 15:38:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:38:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:38:59,478 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 15:38:59,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:38:59,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204479414] [2021-06-12 15:38:59,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204479414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:59,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071759115] [2021-06-12 15:38:59,478 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 15:38:59,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:38:59,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:38:59,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:38:59,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:38:59,784 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 15:38:59,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071759115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:38:59,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:38:59,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:38:59,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936644023] [2021-06-12 15:38:59,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:38:59,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:38:59,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:38:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:38:59,785 INFO L87 Difference]: Start difference. First operand 5203 states and 14568 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 15:39:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:00,953 INFO L93 Difference]: Finished difference Result 7071 states and 18507 transitions. [2021-06-12 15:39:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 15:39:00,953 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 15:39:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:00,960 INFO L225 Difference]: With dead ends: 7071 [2021-06-12 15:39:00,960 INFO L226 Difference]: Without dead ends: 6801 [2021-06-12 15:39:00,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1234.6ms TimeCoverageRelationStatistics Valid=1945, Invalid=5887, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 15:39:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-06-12 15:39:01,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 5278. [2021-06-12 15:39:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.803297328027288) internal successors, (14793), 5277 states have internal predecessors, (14793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14793 transitions. [2021-06-12 15:39:01,028 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14793 transitions. Word has length 185 [2021-06-12 15:39:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:01,029 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14793 transitions. [2021-06-12 15:39:01,029 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 15:39:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14793 transitions. [2021-06-12 15:39:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:01,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:01,033 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 15:39:01,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:01,234 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:01,234 INFO L82 PathProgramCache]: Analyzing trace with hash -83191379, now seen corresponding path program 478 times [2021-06-12 15:39:01,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:01,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817756824] [2021-06-12 15:39:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:01,615 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 15:39:01,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:01,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817756824] [2021-06-12 15:39:01,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817756824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:01,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199372628] [2021-06-12 15:39:01,615 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 15:39:01,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:39:01,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:01,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:01,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:01,922 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 15:39:01,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199372628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:01,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:01,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:39:01,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953906352] [2021-06-12 15:39:01,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:39:01,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:01,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:39:01,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:39:01,923 INFO L87 Difference]: Start difference. First operand 5278 states and 14793 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 15:39:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:03,310 INFO L93 Difference]: Finished difference Result 7096 states and 18632 transitions. [2021-06-12 15:39:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 15:39:03,310 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 15:39:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:03,318 INFO L225 Difference]: With dead ends: 7096 [2021-06-12 15:39:03,318 INFO L226 Difference]: Without dead ends: 6826 [2021-06-12 15:39:03,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1438.2ms TimeCoverageRelationStatistics Valid=1981, Invalid=6209, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:39:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2021-06-12 15:39:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 5353. [2021-06-12 15:39:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5353 states, 5352 states have (on average 2.8060538116591927) internal successors, (15018), 5352 states have internal predecessors, (15018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5353 states to 5353 states and 15018 transitions. [2021-06-12 15:39:03,389 INFO L78 Accepts]: Start accepts. Automaton has 5353 states and 15018 transitions. Word has length 185 [2021-06-12 15:39:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:03,389 INFO L482 AbstractCegarLoop]: Abstraction has 5353 states and 15018 transitions. [2021-06-12 15:39:03,389 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 15:39:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5353 states and 15018 transitions. [2021-06-12 15:39:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:03,394 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:03,394 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 15:39:03,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-12 15:39:03,594 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:03,595 INFO L82 PathProgramCache]: Analyzing trace with hash -858110405, now seen corresponding path program 479 times [2021-06-12 15:39:03,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:03,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048583267] [2021-06-12 15:39:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:03,966 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 15:39:03,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:03,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048583267] [2021-06-12 15:39:03,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048583267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:03,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847464433] [2021-06-12 15:39:03,967 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 15:39:04,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:39:04,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:04,264 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 15:39:04,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847464433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:04,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:04,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:39:04,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435346232] [2021-06-12 15:39:04,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:39:04,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:04,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:39:04,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:39:04,265 INFO L87 Difference]: Start difference. First operand 5353 states and 15018 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 15:39:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:05,481 INFO L93 Difference]: Finished difference Result 7121 states and 18757 transitions. [2021-06-12 15:39:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 15:39:05,482 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 15:39:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:05,490 INFO L225 Difference]: With dead ends: 7121 [2021-06-12 15:39:05,490 INFO L226 Difference]: Without dead ends: 6851 [2021-06-12 15:39:05,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 1249.5ms TimeCoverageRelationStatistics Valid=2081, Invalid=6109, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 15:39:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2021-06-12 15:39:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 5428. [2021-06-12 15:39:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 2.80873410724157) internal successors, (15243), 5427 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 15243 transitions. [2021-06-12 15:39:05,563 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 15243 transitions. Word has length 185 [2021-06-12 15:39:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:05,563 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 15243 transitions. [2021-06-12 15:39:05,563 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 15:39:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 15243 transitions. [2021-06-12 15:39:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:05,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:05,568 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 15:39:05,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:05,768 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:05,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1312023765, now seen corresponding path program 480 times [2021-06-12 15:39:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:05,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696502556] [2021-06-12 15:39:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:06,148 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 15:39:06,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:06,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696502556] [2021-06-12 15:39:06,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696502556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:06,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46938534] [2021-06-12 15:39:06,148 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 15:39:06,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:39:06,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:06,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:06,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:06,475 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 15:39:06,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46938534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:06,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:06,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:39:06,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450030279] [2021-06-12 15:39:06,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:39:06,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:06,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:39:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:39:06,476 INFO L87 Difference]: Start difference. First operand 5428 states and 15243 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 15:39:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:07,932 INFO L93 Difference]: Finished difference Result 7146 states and 18882 transitions. [2021-06-12 15:39:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 15:39:07,932 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 15:39:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:07,940 INFO L225 Difference]: With dead ends: 7146 [2021-06-12 15:39:07,940 INFO L226 Difference]: Without dead ends: 6876 [2021-06-12 15:39:07,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 1471.1ms TimeCoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:39:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-06-12 15:39:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5503. [2021-06-12 15:39:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5503 states, 5502 states have (on average 2.8113413304253) internal successors, (15468), 5502 states have internal predecessors, (15468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5503 states to 5503 states and 15468 transitions. [2021-06-12 15:39:08,015 INFO L78 Accepts]: Start accepts. Automaton has 5503 states and 15468 transitions. Word has length 185 [2021-06-12 15:39:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:08,015 INFO L482 AbstractCegarLoop]: Abstraction has 5503 states and 15468 transitions. [2021-06-12 15:39:08,015 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 15:39:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 5503 states and 15468 transitions. [2021-06-12 15:39:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:08,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:08,020 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 15:39:08,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-12 15:39:08,221 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:08,221 INFO L82 PathProgramCache]: Analyzing trace with hash -434011847, now seen corresponding path program 481 times [2021-06-12 15:39:08,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:08,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878042318] [2021-06-12 15:39:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:08,595 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 15:39:08,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:08,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878042318] [2021-06-12 15:39:08,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878042318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:08,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620298607] [2021-06-12 15:39:08,595 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 15:39:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:08,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:08,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:08,916 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 15:39:08,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620298607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:08,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:08,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:39:08,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7912777] [2021-06-12 15:39:08,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:39:08,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:08,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:39:08,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:39:08,917 INFO L87 Difference]: Start difference. First operand 5503 states and 15468 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 15:39:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:10,181 INFO L93 Difference]: Finished difference Result 7171 states and 19007 transitions. [2021-06-12 15:39:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 15:39:10,181 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 15:39:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:10,190 INFO L225 Difference]: With dead ends: 7171 [2021-06-12 15:39:10,190 INFO L226 Difference]: Without dead ends: 6901 [2021-06-12 15:39:10,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 1295.0ms TimeCoverageRelationStatistics Valid=2233, Invalid=6323, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 15:39:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-06-12 15:39:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5578. [2021-06-12 15:39:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5578 states, 5577 states have (on average 2.8138784292630445) internal successors, (15693), 5577 states have internal predecessors, (15693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 15693 transitions. [2021-06-12 15:39:10,268 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 15693 transitions. Word has length 185 [2021-06-12 15:39:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:10,268 INFO L482 AbstractCegarLoop]: Abstraction has 5578 states and 15693 transitions. [2021-06-12 15:39:10,268 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 15:39:10,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 15693 transitions. [2021-06-12 15:39:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:10,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:10,273 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 15:39:10,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:10,474 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:10,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:10,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1334066647, now seen corresponding path program 482 times [2021-06-12 15:39:10,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:10,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627378887] [2021-06-12 15:39:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:10,876 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 15:39:10,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:10,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627378887] [2021-06-12 15:39:10,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627378887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:10,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562778017] [2021-06-12 15:39:10,877 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 15:39:10,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:39:10,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:10,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:11,178 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 15:39:11,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562778017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:11,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:11,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:39:11,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618357884] [2021-06-12 15:39:11,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:39:11,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:11,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:39:11,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:39:11,179 INFO L87 Difference]: Start difference. First operand 5578 states and 15693 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 15:39:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:12,697 INFO L93 Difference]: Finished difference Result 7196 states and 19132 transitions. [2021-06-12 15:39:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 15:39:12,697 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 15:39:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:12,705 INFO L225 Difference]: With dead ends: 7196 [2021-06-12 15:39:12,705 INFO L226 Difference]: Without dead ends: 6926 [2021-06-12 15:39:12,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 1559.7ms TimeCoverageRelationStatistics Valid=2273, Invalid=6657, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:39:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-06-12 15:39:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 5653. [2021-06-12 15:39:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5653 states, 5652 states have (on average 2.816348195329087) internal successors, (15918), 5652 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5653 states to 5653 states and 15918 transitions. [2021-06-12 15:39:12,803 INFO L78 Accepts]: Start accepts. Automaton has 5653 states and 15918 transitions. Word has length 185 [2021-06-12 15:39:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:12,804 INFO L482 AbstractCegarLoop]: Abstraction has 5653 states and 15918 transitions. [2021-06-12 15:39:12,804 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 15:39:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 5653 states and 15918 transitions. [2021-06-12 15:39:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:12,808 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:12,809 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 15:39:13,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-12 15:39:13,009 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1763130953, now seen corresponding path program 483 times [2021-06-12 15:39:13,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:13,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106829670] [2021-06-12 15:39:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:13,373 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 15:39:13,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:13,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106829670] [2021-06-12 15:39:13,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106829670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:13,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668459636] [2021-06-12 15:39:13,374 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 15:39:13,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:39:13,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:13,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:13,679 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 15:39:13,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668459636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:13,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:13,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:39:13,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337736542] [2021-06-12 15:39:13,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:39:13,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:13,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:39:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:39:13,680 INFO L87 Difference]: Start difference. First operand 5653 states and 15918 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 15:39:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:15,020 INFO L93 Difference]: Finished difference Result 7221 states and 19257 transitions. [2021-06-12 15:39:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 15:39:15,020 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 15:39:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:15,026 INFO L225 Difference]: With dead ends: 7221 [2021-06-12 15:39:15,026 INFO L226 Difference]: Without dead ends: 6951 [2021-06-12 15:39:15,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 1327.2ms TimeCoverageRelationStatistics Valid=2401, Invalid=6529, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 15:39:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-12 15:39:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5728. [2021-06-12 15:39:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5728 states, 5727 states have (on average 2.818753273965427) internal successors, (16143), 5727 states have internal predecessors, (16143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5728 states to 5728 states and 16143 transitions. [2021-06-12 15:39:15,094 INFO L78 Accepts]: Start accepts. Automaton has 5728 states and 16143 transitions. Word has length 185 [2021-06-12 15:39:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:15,094 INFO L482 AbstractCegarLoop]: Abstraction has 5728 states and 16143 transitions. [2021-06-12 15:39:15,094 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 15:39:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5728 states and 16143 transitions. [2021-06-12 15:39:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:15,099 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:15,099 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 15:39:15,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:15,299 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:15,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1845653159, now seen corresponding path program 484 times [2021-06-12 15:39:15,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:15,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462859121] [2021-06-12 15:39:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:15,678 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 15:39:15,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:15,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462859121] [2021-06-12 15:39:15,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462859121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:15,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921724076] [2021-06-12 15:39:15,679 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 15:39:15,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:39:15,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:15,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:15,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:15,987 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 15:39:15,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921724076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:15,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:15,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:39:15,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458912153] [2021-06-12 15:39:15,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:39:15,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:39:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:39:15,988 INFO L87 Difference]: Start difference. First operand 5728 states and 16143 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 15:39:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:17,587 INFO L93 Difference]: Finished difference Result 7246 states and 19382 transitions. [2021-06-12 15:39:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 15:39:17,588 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 15:39:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:17,594 INFO L225 Difference]: With dead ends: 7246 [2021-06-12 15:39:17,594 INFO L226 Difference]: Without dead ends: 6976 [2021-06-12 15:39:17,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 1574.9ms TimeCoverageRelationStatistics Valid=2443, Invalid=6869, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 15:39:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6976 states. [2021-06-12 15:39:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6976 to 5803. [2021-06-12 15:39:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5803 states, 5802 states have (on average 2.8210961737331957) internal successors, (16368), 5802 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 16368 transitions. [2021-06-12 15:39:17,667 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 16368 transitions. Word has length 185 [2021-06-12 15:39:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:17,667 INFO L482 AbstractCegarLoop]: Abstraction has 5803 states and 16368 transitions. [2021-06-12 15:39:17,667 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 15:39:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 16368 transitions. [2021-06-12 15:39:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:17,672 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:17,672 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 15:39:17,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:17,873 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1760618421, now seen corresponding path program 485 times [2021-06-12 15:39:17,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:17,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246406742] [2021-06-12 15:39:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:18,247 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 15:39:18,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:18,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246406742] [2021-06-12 15:39:18,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246406742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:18,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740820004] [2021-06-12 15:39:18,247 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 15:39:18,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 15:39:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:18,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:18,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:18,553 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 15:39:18,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740820004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:18,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:18,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:39:18,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171038973] [2021-06-12 15:39:18,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:39:18,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:39:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:39:18,555 INFO L87 Difference]: Start difference. First operand 5803 states and 16368 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 15:39:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:19,940 INFO L93 Difference]: Finished difference Result 7271 states and 19507 transitions. [2021-06-12 15:39:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 15:39:19,940 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 15:39:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:19,947 INFO L225 Difference]: With dead ends: 7271 [2021-06-12 15:39:19,947 INFO L226 Difference]: Without dead ends: 7001 [2021-06-12 15:39:19,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 1369.4ms TimeCoverageRelationStatistics Valid=2585, Invalid=6727, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 15:39:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-12 15:39:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5878. [2021-06-12 15:39:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 2.8233792751403777) internal successors, (16593), 5877 states have internal predecessors, (16593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16593 transitions. [2021-06-12 15:39:20,022 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16593 transitions. Word has length 185 [2021-06-12 15:39:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:20,022 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16593 transitions. [2021-06-12 15:39:20,022 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 15:39:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16593 transitions. [2021-06-12 15:39:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:20,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:20,027 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 15:39:20,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:20,228 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:20,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:20,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1692467365, now seen corresponding path program 486 times [2021-06-12 15:39:20,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:20,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715634303] [2021-06-12 15:39:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:20,602 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 15:39:20,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:20,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715634303] [2021-06-12 15:39:20,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715634303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:20,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330164107] [2021-06-12 15:39:20,603 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 15:39:20,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 15:39:20,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:20,922 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 15:39:20,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330164107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:20,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:20,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:39:20,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939584381] [2021-06-12 15:39:20,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:39:20,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:20,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:39:20,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:39:20,923 INFO L87 Difference]: Start difference. First operand 5878 states and 16593 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 15:39:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:22,572 INFO L93 Difference]: Finished difference Result 7296 states and 19632 transitions. [2021-06-12 15:39:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 15:39:22,573 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 15:39:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:22,580 INFO L225 Difference]: With dead ends: 7296 [2021-06-12 15:39:22,580 INFO L226 Difference]: Without dead ends: 7026 [2021-06-12 15:39:22,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2689 ImplicationChecksByTransitivity, 1636.9ms TimeCoverageRelationStatistics Valid=2629, Invalid=7073, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 15:39:22,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2021-06-12 15:39:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 5953. [2021-06-12 15:39:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5952 states have (on average 2.8256048387096775) internal successors, (16818), 5952 states have internal predecessors, (16818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 16818 transitions. [2021-06-12 15:39:22,658 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 16818 transitions. Word has length 185 [2021-06-12 15:39:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:22,658 INFO L482 AbstractCegarLoop]: Abstraction has 5953 states and 16818 transitions. [2021-06-12 15:39:22,658 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 15:39:22,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 16818 transitions. [2021-06-12 15:39:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:22,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:22,663 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 15:39:22,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-06-12 15:39:22,864 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:22,864 INFO L82 PathProgramCache]: Analyzing trace with hash 395498291, now seen corresponding path program 487 times [2021-06-12 15:39:22,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:22,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194291211] [2021-06-12 15:39:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:23,228 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 15:39:23,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:23,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194291211] [2021-06-12 15:39:23,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194291211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:23,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74935935] [2021-06-12 15:39:23,229 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 15:39:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:23,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:23,543 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 15:39:23,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74935935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:23,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:23,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:39:23,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86498204] [2021-06-12 15:39:23,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:39:23,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:23,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:39:23,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:39:23,544 INFO L87 Difference]: Start difference. First operand 5953 states and 16818 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 15:39:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:24,956 INFO L93 Difference]: Finished difference Result 7366 states and 19877 transitions. [2021-06-12 15:39:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 15:39:24,957 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 15:39:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:24,965 INFO L225 Difference]: With dead ends: 7366 [2021-06-12 15:39:24,965 INFO L226 Difference]: Without dead ends: 7096 [2021-06-12 15:39:24,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 1418.3ms TimeCoverageRelationStatistics Valid=2785, Invalid=6917, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 15:39:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-06-12 15:39:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6028. [2021-06-12 15:39:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.83026381284221) internal successors, (17058), 6027 states have internal predecessors, (17058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:39:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 17058 transitions. [2021-06-12 15:39:25,043 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 17058 transitions. Word has length 185 [2021-06-12 15:39:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:25,043 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 17058 transitions. [2021-06-12 15:39:25,043 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 15:39:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 17058 transitions. [2021-06-12 15:39:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:25,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:25,048 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 15:39:25,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:25,249 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:25,249 INFO L82 PathProgramCache]: Analyzing trace with hash 825251875, now seen corresponding path program 488 times [2021-06-12 15:39:25,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:25,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045532137] [2021-06-12 15:39:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:25,652 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 15:39:25,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:25,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045532137] [2021-06-12 15:39:25,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045532137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:25,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65010966] [2021-06-12 15:39:25,653 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 15:39:25,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:39:25,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:25,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:25,956 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 15:39:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65010966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:25,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:25,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:39:25,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144828377] [2021-06-12 15:39:25,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:39:25,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:25,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:39:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:39:25,957 INFO L87 Difference]: Start difference. First operand 6028 states and 17058 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 15:39:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:27,755 INFO L93 Difference]: Finished difference Result 7944 states and 21503 transitions. [2021-06-12 15:39:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 15:39:27,755 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 15:39:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:27,762 INFO L225 Difference]: With dead ends: 7944 [2021-06-12 15:39:27,762 INFO L226 Difference]: Without dead ends: 7321 [2021-06-12 15:39:27,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 1762.8ms TimeCoverageRelationStatistics Valid=2852, Invalid=7654, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 15:39:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7321 states. [2021-06-12 15:39:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7321 to 6103. [2021-06-12 15:39:27,819 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 15:39:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17288 transitions. [2021-06-12 15:39:27,828 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17288 transitions. Word has length 185 [2021-06-12 15:39:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:27,828 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17288 transitions. [2021-06-12 15:39:27,828 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 15:39:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17288 transitions. [2021-06-12 15:39:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:27,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:27,834 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 15:39:28,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-12 15:39:28,034 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash 767517745, now seen corresponding path program 489 times [2021-06-12 15:39:28,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:28,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970112545] [2021-06-12 15:39:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:28,410 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 15:39:28,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:28,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970112545] [2021-06-12 15:39:28,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970112545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:28,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368135141] [2021-06-12 15:39:28,411 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 15:39:28,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 15:39:28,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:28,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:28,711 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 15:39:28,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368135141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:28,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:28,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-12 15:39:28,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270783427] [2021-06-12 15:39:28,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 15:39:28,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:28,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 15:39:28,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:39:28,713 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 15:39:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:30,186 INFO L93 Difference]: Finished difference Result 8148 states and 22171 transitions. [2021-06-12 15:39:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 15:39:30,186 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 15:39:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:30,193 INFO L225 Difference]: With dead ends: 8148 [2021-06-12 15:39:30,194 INFO L226 Difference]: Without dead ends: 7878 [2021-06-12 15:39:30,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1449.8ms TimeCoverageRelationStatistics Valid=3002, Invalid=7098, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 15:39:30,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-12 15:39:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 6283. [2021-06-12 15:39:30,258 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 15:39:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 17847 transitions. [2021-06-12 15:39:30,268 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 17847 transitions. Word has length 185 [2021-06-12 15:39:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:30,268 INFO L482 AbstractCegarLoop]: Abstraction has 6283 states and 17847 transitions. [2021-06-12 15:39:30,268 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 15:39:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 17847 transitions. [2021-06-12 15:39:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-12 15:39:30,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:30,273 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 15:39:30,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-12 15:39:30,474 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash 789860995, now seen corresponding path program 490 times [2021-06-12 15:39:30,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:30,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571394303] [2021-06-12 15:39:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:30,861 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 15:39:30,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:30,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571394303] [2021-06-12 15:39:30,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571394303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:30,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191395159] [2021-06-12 15:39:30,862 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 15:39:30,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:39:30,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:30,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 15:39:30,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:31,164 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 15:39:31,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191395159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:31,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:31,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-12 15:39:31,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813819723] [2021-06-12 15:39:31,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 15:39:31,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:31,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 15:39:31,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:39:31,165 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 15:39:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:32,895 INFO L93 Difference]: Finished difference Result 7610 states and 20821 transitions. [2021-06-12 15:39:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 15:39:32,896 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 15:39:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:32,903 INFO L225 Difference]: With dead ends: 7610 [2021-06-12 15:39:32,903 INFO L226 Difference]: Without dead ends: 7121 [2021-06-12 15:39:32,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 1740.1ms TimeCoverageRelationStatistics Valid=3052, Invalid=7454, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 15:39:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7121 states. [2021-06-12 15:39:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7121 to 6228. [2021-06-12 15:39:32,963 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 15:39:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 17683 transitions. [2021-06-12 15:39:32,973 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 17683 transitions. Word has length 185 [2021-06-12 15:39:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:32,973 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 17683 transitions. [2021-06-12 15:39:32,973 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 15:39:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 17683 transitions. [2021-06-12 15:39:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:32,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:32,978 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 15:39:33,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-12 15:39:33,178 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:33,179 INFO L82 PathProgramCache]: Analyzing trace with hash -719599095, now seen corresponding path program 491 times [2021-06-12 15:39:33,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:33,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555991482] [2021-06-12 15:39:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:33,636 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 15:39:33,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:33,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555991482] [2021-06-12 15:39:33,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555991482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:33,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817817748] [2021-06-12 15:39:33,637 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 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 15:39:33,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:39:33,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 15:39:33,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:34,041 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 15:39:34,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817817748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:34,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:34,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 41 [2021-06-12 15:39:34,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624406747] [2021-06-12 15:39:34,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 15:39:34,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 15:39:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:39:34,042 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 15:39:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:34,987 INFO L93 Difference]: Finished difference Result 7668 states and 20883 transitions. [2021-06-12 15:39:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:39:34,988 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 15:39:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:34,996 INFO L225 Difference]: With dead ends: 7668 [2021-06-12 15:39:34,996 INFO L226 Difference]: Without dead ends: 7334 [2021-06-12 15:39:34,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1141.1ms TimeCoverageRelationStatistics Valid=1716, Invalid=4446, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:39:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7334 states. [2021-06-12 15:39:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7334 to 6313. [2021-06-12 15:39:35,060 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 15:39:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 17853 transitions. [2021-06-12 15:39:35,070 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 17853 transitions. Word has length 190 [2021-06-12 15:39:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:35,070 INFO L482 AbstractCegarLoop]: Abstraction has 6313 states and 17853 transitions. [2021-06-12 15:39:35,070 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 15:39:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 17853 transitions. [2021-06-12 15:39:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:35,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:35,075 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 15:39:35,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-12 15:39:35,276 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:35,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1353516717, now seen corresponding path program 492 times [2021-06-12 15:39:35,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:35,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571901835] [2021-06-12 15:39:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:35,756 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 15:39:35,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571901835] [2021-06-12 15:39:35,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571901835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514722157] [2021-06-12 15:39:35,756 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 15:39:35,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:39:35,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:35,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:36,140 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 15:39:36,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514722157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:36,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:36,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:36,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095235184] [2021-06-12 15:39:36,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:36,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:36,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:36,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:36,141 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 15:39:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:36,934 INFO L93 Difference]: Finished difference Result 9061 states and 23477 transitions. [2021-06-12 15:39:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:39:36,934 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 15:39:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:36,944 INFO L225 Difference]: With dead ends: 9061 [2021-06-12 15:39:36,945 INFO L226 Difference]: Without dead ends: 8791 [2021-06-12 15:39:36,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1046.9ms TimeCoverageRelationStatistics Valid=1502, Invalid=3754, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 15:39:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2021-06-12 15:39:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 6328. [2021-06-12 15:39:37,019 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 15:39:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:37,029 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:37,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:37,029 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:37,029 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 15:39:37,029 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:37,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:37,035 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 15:39:37,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:37,235 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:37,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:37,236 INFO L82 PathProgramCache]: Analyzing trace with hash 507224989, now seen corresponding path program 493 times [2021-06-12 15:39:37,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:37,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389822663] [2021-06-12 15:39:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:37,742 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 15:39:37,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:37,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389822663] [2021-06-12 15:39:37,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389822663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:37,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679559170] [2021-06-12 15:39:37,742 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 15:39:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:37,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:37,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:38,134 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 15:39:38,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679559170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:38,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:38,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:38,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076405108] [2021-06-12 15:39:38,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:38,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:38,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:38,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:38,135 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 15:39:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:39,018 INFO L93 Difference]: Finished difference Result 8946 states and 23247 transitions. [2021-06-12 15:39:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:39:39,018 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 15:39:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:39,028 INFO L225 Difference]: With dead ends: 8946 [2021-06-12 15:39:39,028 INFO L226 Difference]: Without dead ends: 8676 [2021-06-12 15:39:39,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1156.7ms TimeCoverageRelationStatistics Valid=1595, Invalid=4257, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:39:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-06-12 15:39:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6328. [2021-06-12 15:39:39,105 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 15:39:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:39,115 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:39,115 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:39,115 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 15:39:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:39,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:39,121 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 15:39:39,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-12 15:39:39,322 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:39,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1027331413, now seen corresponding path program 494 times [2021-06-12 15:39:39,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:39,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456962020] [2021-06-12 15:39:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:39,790 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 15:39:39,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:39,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456962020] [2021-06-12 15:39:39,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456962020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:39,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501103274] [2021-06-12 15:39:39,791 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 15:39:39,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:39:39,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:39,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:40,164 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 15:39:40,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501103274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:40,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:40,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:40,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756811593] [2021-06-12 15:39:40,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:40,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:40,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:40,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:40,165 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 15:39:41,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:41,034 INFO L93 Difference]: Finished difference Result 8921 states and 23197 transitions. [2021-06-12 15:39:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:39:41,034 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 15:39:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:41,044 INFO L225 Difference]: With dead ends: 8921 [2021-06-12 15:39:41,045 INFO L226 Difference]: Without dead ends: 8651 [2021-06-12 15:39:41,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 1074.4ms TimeCoverageRelationStatistics Valid=1494, Invalid=4056, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 15:39:41,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8651 states. [2021-06-12 15:39:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8651 to 6328. [2021-06-12 15:39:41,117 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 15:39:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:41,127 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:41,127 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:41,128 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 15:39:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:41,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:41,133 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 15:39:41,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:41,334 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:41,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:41,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1704276891, now seen corresponding path program 495 times [2021-06-12 15:39:41,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:41,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249897590] [2021-06-12 15:39:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:41,817 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 15:39:41,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:41,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249897590] [2021-06-12 15:39:41,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249897590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:41,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254384013] [2021-06-12 15:39:41,818 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 15:39:41,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:39:41,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:41,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:41,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:42,228 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 15:39:42,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254384013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:42,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:42,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:42,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194615448] [2021-06-12 15:39:42,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:42,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:42,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:42,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:42,229 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 15:39:43,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:43,180 INFO L93 Difference]: Finished difference Result 8871 states and 23097 transitions. [2021-06-12 15:39:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:39:43,180 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 15:39:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:43,189 INFO L225 Difference]: With dead ends: 8871 [2021-06-12 15:39:43,189 INFO L226 Difference]: Without dead ends: 8601 [2021-06-12 15:39:43,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1186.2ms TimeCoverageRelationStatistics Valid=1595, Invalid=4567, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:39:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8601 states. [2021-06-12 15:39:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8601 to 6328. [2021-06-12 15:39:43,262 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 15:39:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:43,272 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:43,272 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:43,273 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 15:39:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:43,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:43,278 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 15:39:43,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-12 15:39:43,478 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash -897936343, now seen corresponding path program 496 times [2021-06-12 15:39:43,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:43,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473217362] [2021-06-12 15:39:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:43,975 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 15:39:43,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:43,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473217362] [2021-06-12 15:39:43,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473217362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:43,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910881313] [2021-06-12 15:39:43,976 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 15:39:44,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:39:44,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:44,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:44,310 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 15:39:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910881313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:44,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:44,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:44,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630448408] [2021-06-12 15:39:44,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:44,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:44,312 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 15:39:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:45,190 INFO L93 Difference]: Finished difference Result 8821 states and 22997 transitions. [2021-06-12 15:39:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:39:45,190 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 15:39:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:45,199 INFO L225 Difference]: With dead ends: 8821 [2021-06-12 15:39:45,199 INFO L226 Difference]: Without dead ends: 8551 [2021-06-12 15:39:45,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1138.4ms TimeCoverageRelationStatistics Valid=1502, Invalid=4350, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 15:39:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2021-06-12 15:39:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 6328. [2021-06-12 15:39:45,268 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 15:39:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:45,277 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:45,278 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:45,278 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 15:39:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:45,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:45,283 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 15:39:45,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-12 15:39:45,483 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1838872295, now seen corresponding path program 497 times [2021-06-12 15:39:45,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:45,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230000870] [2021-06-12 15:39:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:45,980 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 15:39:45,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:45,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230000870] [2021-06-12 15:39:45,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230000870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:45,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193370914] [2021-06-12 15:39:45,981 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 15:39:46,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:39:46,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:46,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:46,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:46,340 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 15:39:46,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193370914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:46,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:46,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:46,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590283511] [2021-06-12 15:39:46,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:46,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:46,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:46,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:46,341 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 15:39:47,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:47,362 INFO L93 Difference]: Finished difference Result 8771 states and 22897 transitions. [2021-06-12 15:39:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:39:47,362 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 15:39:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:47,371 INFO L225 Difference]: With dead ends: 8771 [2021-06-12 15:39:47,371 INFO L226 Difference]: Without dead ends: 8501 [2021-06-12 15:39:47,372 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1264.2ms TimeCoverageRelationStatistics Valid=1611, Invalid=4869, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:39:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-06-12 15:39:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 6328. [2021-06-12 15:39:47,443 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 15:39:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:47,453 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:47,453 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:47,453 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 15:39:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:47,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:47,459 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 15:39:47,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:47,659 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash -207543513, now seen corresponding path program 498 times [2021-06-12 15:39:47,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:47,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028359240] [2021-06-12 15:39:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:48,129 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 15:39:48,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:48,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028359240] [2021-06-12 15:39:48,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028359240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:48,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126265827] [2021-06-12 15:39:48,130 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 15:39:48,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 15:39:48,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:48,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:48,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:48,481 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 15:39:48,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126265827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:48,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:48,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:48,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755902965] [2021-06-12 15:39:48,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:48,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:48,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:48,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:48,482 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 15:39:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:49,432 INFO L93 Difference]: Finished difference Result 8721 states and 22797 transitions. [2021-06-12 15:39:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:39:49,432 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 15:39:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:49,442 INFO L225 Difference]: With dead ends: 8721 [2021-06-12 15:39:49,442 INFO L226 Difference]: Without dead ends: 8451 [2021-06-12 15:39:49,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1157.0ms TimeCoverageRelationStatistics Valid=1526, Invalid=4636, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 15:39:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8451 states. [2021-06-12 15:39:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8451 to 6328. [2021-06-12 15:39:49,514 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 15:39:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:49,524 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:49,524 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:49,524 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 15:39:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:49,529 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:49,530 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 15:39:49,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-12 15:39:49,730 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:49,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:49,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1053031401, now seen corresponding path program 499 times [2021-06-12 15:39:49,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:49,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829986218] [2021-06-12 15:39:49,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:50,210 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 15:39:50,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:50,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829986218] [2021-06-12 15:39:50,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829986218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:50,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225174906] [2021-06-12 15:39:50,210 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 15:39:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:50,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:50,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:50,564 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 15:39:50,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225174906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:50,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:50,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:50,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725144999] [2021-06-12 15:39:50,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:50,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:50,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:50,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:50,565 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 15:39:51,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:51,662 INFO L93 Difference]: Finished difference Result 8671 states and 22697 transitions. [2021-06-12 15:39:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:39:51,662 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 15:39:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:51,672 INFO L225 Difference]: With dead ends: 8671 [2021-06-12 15:39:51,672 INFO L226 Difference]: Without dead ends: 8401 [2021-06-12 15:39:51,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1306.5ms TimeCoverageRelationStatistics Valid=1643, Invalid=5163, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:39:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2021-06-12 15:39:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 6328. [2021-06-12 15:39:51,746 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 15:39:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:51,756 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:51,756 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:51,756 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 15:39:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:51,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:51,762 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 15:39:51,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-12 15:39:51,962 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:51,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:51,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1335932837, now seen corresponding path program 500 times [2021-06-12 15:39:51,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:51,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844963339] [2021-06-12 15:39:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:52,413 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 15:39:52,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:52,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844963339] [2021-06-12 15:39:52,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844963339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:52,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348698286] [2021-06-12 15:39:52,414 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 15:39:52,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:39:52,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:52,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:52,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:52,748 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 15:39:52,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348698286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:52,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:52,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:52,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807988329] [2021-06-12 15:39:52,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:52,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:52,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:52,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:52,749 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 15:39:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:53,741 INFO L93 Difference]: Finished difference Result 8621 states and 22597 transitions. [2021-06-12 15:39:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:39:53,741 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 15:39:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:53,751 INFO L225 Difference]: With dead ends: 8621 [2021-06-12 15:39:53,751 INFO L226 Difference]: Without dead ends: 8351 [2021-06-12 15:39:53,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1148.0ms TimeCoverageRelationStatistics Valid=1566, Invalid=4914, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 15:39:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2021-06-12 15:39:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 6328. [2021-06-12 15:39:53,853 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 15:39:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:53,861 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:53,862 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:53,862 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 15:39:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:53,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:53,867 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 15:39:54,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:54,068 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:54,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2075982699, now seen corresponding path program 501 times [2021-06-12 15:39:54,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:54,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784779210] [2021-06-12 15:39:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:54,506 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 15:39:54,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:54,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784779210] [2021-06-12 15:39:54,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784779210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:54,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139485574] [2021-06-12 15:39:54,507 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 15:39:54,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 15:39:54,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:54,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:54,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:54,872 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 15:39:54,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139485574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:54,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:54,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-12 15:39:54,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773794186] [2021-06-12 15:39:54,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 15:39:54,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:54,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 15:39:54,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:39:54,873 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 15:39:56,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:56,060 INFO L93 Difference]: Finished difference Result 8571 states and 22497 transitions. [2021-06-12 15:39:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 15:39:56,060 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 15:39:56,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:56,068 INFO L225 Difference]: With dead ends: 8571 [2021-06-12 15:39:56,068 INFO L226 Difference]: Without dead ends: 8301 [2021-06-12 15:39:56,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1348.9ms TimeCoverageRelationStatistics Valid=1691, Invalid=5449, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 15:39:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-06-12 15:39:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6328. [2021-06-12 15:39:56,134 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 15:39:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:56,144 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:56,144 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:56,144 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 15:39:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:56,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:56,149 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 15:39:56,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:39:56,350 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:56,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:56,350 INFO L82 PathProgramCache]: Analyzing trace with hash 326775203, now seen corresponding path program 502 times [2021-06-12 15:39:56,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:56,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256150420] [2021-06-12 15:39:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:39:56,768 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 15:39:56,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:39:56,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256150420] [2021-06-12 15:39:56,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256150420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:56,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201721958] [2021-06-12 15:39:56,769 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 15:39:56,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:39:56,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:56,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:56,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:57,095 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 15:39:57,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201721958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:39:57,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:39:57,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-12 15:39:57,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342145962] [2021-06-12 15:39:57,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 15:39:57,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:39:57,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 15:39:57,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:39:57,096 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 15:39:58,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:39:58,188 INFO L93 Difference]: Finished difference Result 8521 states and 22397 transitions. [2021-06-12 15:39:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 15:39:58,188 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 15:39:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:39:58,197 INFO L225 Difference]: With dead ends: 8521 [2021-06-12 15:39:58,197 INFO L226 Difference]: Without dead ends: 8251 [2021-06-12 15:39:58,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1206.8ms TimeCoverageRelationStatistics Valid=1622, Invalid=5184, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 15:39:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-12 15:39:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 6328. [2021-06-12 15:39:58,262 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 15:39:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-12 15:39:58,272 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-12 15:39:58,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:39:58,272 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-12 15:39:58,272 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 15:39:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-12 15:39:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-12 15:39:58,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:39:58,278 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] Received shutdown request... [2021-06-12 15:39:58,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-12 15:39:58,478 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:39:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:39:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2126845293, now seen corresponding path program 503 times [2021-06-12 15:39:58,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:39:58,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340345820] [2021-06-12 15:39:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:39:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-06-12 15:39:58,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697064961] [2021-06-12 15:39:58,484 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 15:39:58,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 15:39:58,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:39:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 15:39:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:39:58,582 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-12 15:39:58,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-12 15:39:58,783 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 15:39:58,785 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 15:39:58,786 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 15:39:58,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 03:39:58 BasicIcfg [2021-06-12 15:39:58,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 15:39:58,787 INFO L168 Benchmark]: Toolchain (without parser) took 785804.64 ms. Allocated memory was 208.7 MB in the beginning and 978.3 MB in the end (delta: 769.7 MB). Free memory was 171.8 MB in the beginning and 787.8 MB in the end (delta: -616.0 MB). Peak memory consumption was 155.2 MB. Max. memory is 8.0 GB. [2021-06-12 15:39:58,787 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 208.7 MB. Free memory was 190.2 MB in the beginning and 190.1 MB in the end (delta: 85.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:39:58,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 388.88 ms. Allocated memory is still 208.7 MB. Free memory was 171.6 MB in the beginning and 172.3 MB in the end (delta: -674.0 kB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-12 15:39:58,787 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.47 ms. Allocated memory is still 208.7 MB. Free memory was 172.3 MB in the beginning and 170.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:39:58,787 INFO L168 Benchmark]: Boogie Preprocessor took 20.68 ms. Allocated memory is still 208.7 MB. Free memory was 170.2 MB in the beginning and 169.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:39:58,788 INFO L168 Benchmark]: RCFGBuilder took 498.80 ms. Allocated memory is still 208.7 MB. Free memory was 168.6 MB in the beginning and 147.1 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:39:58,788 INFO L168 Benchmark]: TraceAbstraction took 784860.68 ms. Allocated memory was 208.7 MB in the beginning and 978.3 MB in the end (delta: 769.7 MB). Free memory was 146.6 MB in the beginning and 787.8 MB in the end (delta: -641.2 MB). Peak memory consumption was 129.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:39:58,788 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 208.7 MB. Free memory was 190.2 MB in the beginning and 190.1 MB in the end (delta: 85.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 388.88 ms. Allocated memory is still 208.7 MB. Free memory was 171.6 MB in the beginning and 172.3 MB in the end (delta: -674.0 kB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.47 ms. Allocated memory is still 208.7 MB. Free memory was 172.3 MB in the beginning and 170.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.68 ms. Allocated memory is still 208.7 MB. Free memory was 170.2 MB in the beginning and 169.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 498.80 ms. Allocated memory is still 208.7 MB. Free memory was 168.6 MB in the beginning and 147.1 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 784860.68 ms. Allocated memory was 208.7 MB in the beginning and 978.3 MB in the end (delta: 769.7 MB). Free memory was 146.6 MB in the beginning and 787.8 MB in the end (delta: -641.2 MB). Peak memory consumption was 129.0 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 191 with TraceHistMax 16,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - 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: 784745.9ms, OverallIterations: 512, TraceHistogramMax: 16, EmptinessCheckTime: 1676.0ms, AutomataDifference: 393636.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 111.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49622 SDtfs, 592320 SDslu, 540982 SDs, 0 SdLazy, 99434 SolverSat, 100519 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64758.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100099 GetRequests, 69132 SyntacticMatches, 0 SemanticMatches, 30967 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513660 ImplicationChecksByTransitivity, 405620.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6328occurred in iteration=501, InterpolantAutomatonStates: 21729, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23197.8ms AutomataMinimizationTime, 511 MinimizatonAttempts, 618033 StatesRemovedByMinimization, 511 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6431.5ms SsaConstructionTime, 17695.5ms SatisfiabilityAnalysisTime, 221893.2ms InterpolantComputationTime, 138338 NumberOfCodeBlocks, 138338 NumberOfCodeBlocksAsserted, 3810 NumberOfCheckSat, 137322 ConstructedInterpolants, 0 QuantifiedInterpolants, 605750 SizeOfPredicates, 11301 NumberOfNonLiveVariables, 134728 ConjunctsInSsa, 13827 ConjunctsInUnsatCore, 1016 InterpolantComputations, 6 PerfectInterpolantSequences, 1/532584 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