/usr/bin/java -Xmx16000000000 -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/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 15:22:34,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 15:22:34,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 15:22:34,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 15:22:34,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 15:22:34,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 15:22:34,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 15:22:34,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 15:22:34,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 15:22:34,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 15:22:34,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 15:22:34,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 15:22:34,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 15:22:34,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 15:22:34,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 15:22:34,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 15:22:34,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 15:22:34,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 15:22:34,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 15:22:34,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 15:22:34,269 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 [2021-05-21 15:22:34,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 15:22:34,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 15:22:34,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 15:22:34,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 15:22:34,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 15:22:34,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 15:22:34,315 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 15:22:34,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 15:22:34,315 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 15:22:34,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 15:22:34,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 15:22:34,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 15:22:34,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 15:22:34,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 15:22:34,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 15:22:34,317 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 15:22:34,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 15:22:34,317 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 15:22:34,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 15:22:34,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 15:22:34,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 15:22:34,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 15:22:34,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 15:22:34,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 15:22:34,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 15:22:34,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 15:22:34,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 15:22:34,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 15:22:34,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 15:22:34,318 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 15:22:34,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 15:22:34,319 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 15:22:34,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 15:22:34,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 15:22:34,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 15:22:34,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 15:22:34,623 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 15:22:34,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2021-05-21 15:22:34,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9915b36/f31ecaea961947a08d04914f894cf39e/FLAGac3b0f500 [2021-05-21 15:22:35,241 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 15:22:35,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2021-05-21 15:22:35,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9915b36/f31ecaea961947a08d04914f894cf39e/FLAGac3b0f500 [2021-05-21 15:22:35,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9915b36/f31ecaea961947a08d04914f894cf39e [2021-05-21 15:22:35,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 15:22:35,695 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 15:22:35,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 15:22:35,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 15:22:35,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 15:22:35,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f46ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35, skipping insertion in model container [2021-05-21 15:22:35,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 15:22:35,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 15:22:36,076 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/fib_bench-2.i[30922,30935] [2021-05-21 15:22:36,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:22:36,084 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 15:22:36,135 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/fib_bench-2.i[30922,30935] [2021-05-21 15:22:36,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:22:36,205 INFO L208 MainTranslator]: Completed translation [2021-05-21 15:22:36,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36 WrapperNode [2021-05-21 15:22:36,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 15:22:36,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 15:22:36,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 15:22:36,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 15:22:36,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (1/1) ... [2021-05-21 15:22:36,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (1/1) ... [2021-05-21 15:22:36,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 15:22:36,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 15:22:36,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 15:22:36,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 15:22:36,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (1/1) ... [2021-05-21 15:22:36,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (1/1) ... [2021-05-21 15:22:36,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (1/1) ... [2021-05-21 15:22:36,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (1/1) ... [2021-05-21 15:22:36,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (1/1) ... [2021-05-21 15:22:36,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (1/1) ... [2021-05-21 15:22:36,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (1/1) ... [2021-05-21 15:22:36,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 15:22:36,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 15:22:36,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 15:22:36,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 15:22:36,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (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 [2021-05-21 15:22:36,322 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-05-21 15:22:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-05-21 15:22:36,322 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-05-21 15:22:36,323 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-05-21 15:22:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 15:22:36,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 15:22:36,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 15:22:36,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 15:22:36,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 15:22:36,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 15:22:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 15:22:36,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 15:22:36,327 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 15:22:36,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 15:22:36,653 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 15:22:36,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:22:36 BoogieIcfgContainer [2021-05-21 15:22:36,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 15:22:36,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 15:22:36,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 15:22:36,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 15:22:36,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 03:22:35" (1/3) ... [2021-05-21 15:22:36,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212e7e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:22:36, skipping insertion in model container [2021-05-21 15:22:36,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:36" (2/3) ... [2021-05-21 15:22:36,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212e7e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:22:36, skipping insertion in model container [2021-05-21 15:22:36,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:22:36" (3/3) ... [2021-05-21 15:22:36,660 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2021-05-21 15:22:36,666 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 15:22:36,666 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 15:22:36,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 15:22:36,667 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 15:22:36,698 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,699 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,699 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,699 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,699 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,699 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,699 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,699 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,700 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,700 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,700 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,700 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,701 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,701 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,701 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,701 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,701 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,701 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,702 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,702 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,702 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,702 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,702 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,703 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,703 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,703 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,703 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,704 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,704 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,704 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,705 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,705 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,706 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,706 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,706 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,707 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,707 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,707 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,707 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,707 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,708 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,708 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,708 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,710 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,710 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,710 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,711 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,711 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,711 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,711 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,711 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,711 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,711 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,713 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,714 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,714 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,714 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,714 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,714 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,721 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,722 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,722 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,722 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,722 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,722 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,724 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 15:22:36,747 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 15:22:36,773 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 15:22:36,773 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 15:22:36,773 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 15:22:36,773 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 15:22:36,773 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 15:22:36,773 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 15:22:36,774 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 15:22:36,774 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 15:22:36,785 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-05-21 15:22:36,890 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 15:22:36,911 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:36,912 INFO L521 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] [2021-05-21 15:22:36,912 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:36,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-05-21 15:22:36,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:36,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566182934] [2021-05-21 15:22:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:37,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:37,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566182934] [2021-05-21 15:22:37,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566182934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:37,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:37,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:22:37,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919584499] [2021-05-21 15:22:37,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:22:37,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:37,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:22:37,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:22:37,308 INFO L87 Difference]: Start difference. First operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 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) [2021-05-21 15:22:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:37,452 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-05-21 15:22:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 15:22:37,454 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 [2021-05-21 15:22:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:37,472 INFO L225 Difference]: With dead ends: 3996 [2021-05-21 15:22:37,473 INFO L226 Difference]: Without dead ends: 1425 [2021-05-21 15:22:37,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:22:37,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-05-21 15:22:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-05-21 15:22:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-05-21 15:22:37,588 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-05-21 15:22:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:37,589 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-05-21 15:22:37,589 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) [2021-05-21 15:22:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-05-21 15:22:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 15:22:37,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:37,594 INFO L521 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] [2021-05-21 15:22:37,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 15:22:37,594 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash -730808461, now seen corresponding path program 1 times [2021-05-21 15:22:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:37,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012822031] [2021-05-21 15:22:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:37,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:37,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012822031] [2021-05-21 15:22:37,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012822031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:37,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:37,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:22:37,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073388377] [2021-05-21 15:22:37,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:22:37,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:22:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:22:37,816 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:37,964 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-05-21 15:22:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:22:37,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 15:22:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:37,974 INFO L225 Difference]: With dead ends: 2025 [2021-05-21 15:22:37,975 INFO L226 Difference]: Without dead ends: 1758 [2021-05-21 15:22:37,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:22:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-05-21 15:22:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-05-21 15:22:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-05-21 15:22:38,024 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-05-21 15:22:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:38,025 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-05-21 15:22:38,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-05-21 15:22:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 15:22:38,030 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:38,030 INFO L521 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] [2021-05-21 15:22:38,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 15:22:38,031 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:38,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-05-21 15:22:38,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:38,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858152568] [2021-05-21 15:22:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:38,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858152568] [2021-05-21 15:22:38,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858152568] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:38,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:38,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:22:38,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716467519] [2021-05-21 15:22:38,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:22:38,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:38,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:22:38,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:22:38,169 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:38,256 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-05-21 15:22:38,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:22:38,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 15:22:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:38,264 INFO L225 Difference]: With dead ends: 2062 [2021-05-21 15:22:38,265 INFO L226 Difference]: Without dead ends: 1758 [2021-05-21 15:22:38,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:22:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-05-21 15:22:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-05-21 15:22:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-05-21 15:22:38,303 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-05-21 15:22:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:38,303 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-05-21 15:22:38,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-05-21 15:22:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 15:22:38,306 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:38,306 INFO L521 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] [2021-05-21 15:22:38,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 15:22:38,306 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:38,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-05-21 15:22:38,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:38,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510897732] [2021-05-21 15:22:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:38,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510897732] [2021-05-21 15:22:38,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510897732] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:38,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:38,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:22:38,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907862116] [2021-05-21 15:22:38,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:22:38,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:38,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:22:38,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:22:38,373 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:38,467 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-05-21 15:22:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 15:22:38,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 15:22:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:38,486 INFO L225 Difference]: With dead ends: 2318 [2021-05-21 15:22:38,486 INFO L226 Difference]: Without dead ends: 1987 [2021-05-21 15:22:38,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:22:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-05-21 15:22:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-05-21 15:22:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-05-21 15:22:38,533 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-05-21 15:22:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:38,535 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-05-21 15:22:38,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-05-21 15:22:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 15:22:38,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:38,538 INFO L521 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, 1, 1] [2021-05-21 15:22:38,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 15:22:38,538 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:38,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1553921205, now seen corresponding path program 1 times [2021-05-21 15:22:38,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:38,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065091487] [2021-05-21 15:22:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:38,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065091487] [2021-05-21 15:22:38,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065091487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:38,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:38,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:22:38,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878748742] [2021-05-21 15:22:38,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:22:38,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:22:38,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:22:38,659 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:38,737 INFO L93 Difference]: Finished difference Result 2203 states and 5812 transitions. [2021-05-21 15:22:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 15:22:38,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 15:22:38,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:38,746 INFO L225 Difference]: With dead ends: 2203 [2021-05-21 15:22:38,746 INFO L226 Difference]: Without dead ends: 2051 [2021-05-21 15:22:38,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:22:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-05-21 15:22:38,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1539. [2021-05-21 15:22:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.6937581274382314) internal successors, (4143), 1538 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4143 transitions. [2021-05-21 15:22:38,789 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4143 transitions. Word has length 42 [2021-05-21 15:22:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:38,789 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4143 transitions. [2021-05-21 15:22:38,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4143 transitions. [2021-05-21 15:22:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 15:22:38,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:38,792 INFO L521 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, 1, 1] [2021-05-21 15:22:38,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 15:22:38,792 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:38,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:38,794 INFO L82 PathProgramCache]: Analyzing trace with hash 591722429, now seen corresponding path program 2 times [2021-05-21 15:22:38,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:38,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639426756] [2021-05-21 15:22:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:38,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639426756] [2021-05-21 15:22:38,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639426756] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:38,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:38,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:22:38,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708870650] [2021-05-21 15:22:38,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:22:38,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:38,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:22:38,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:22:38,887 INFO L87 Difference]: Start difference. First operand 1539 states and 4143 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:39,070 INFO L93 Difference]: Finished difference Result 2907 states and 7732 transitions. [2021-05-21 15:22:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:22:39,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 15:22:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:39,081 INFO L225 Difference]: With dead ends: 2907 [2021-05-21 15:22:39,081 INFO L226 Difference]: Without dead ends: 2461 [2021-05-21 15:22:39,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-05-21 15:22:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1731. [2021-05-21 15:22:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.707514450867052) internal successors, (4684), 1730 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 4684 transitions. [2021-05-21 15:22:39,132 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 4684 transitions. Word has length 42 [2021-05-21 15:22:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:39,132 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 4684 transitions. [2021-05-21 15:22:39,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 4684 transitions. [2021-05-21 15:22:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 15:22:39,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:39,135 INFO L521 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, 1, 1] [2021-05-21 15:22:39,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 15:22:39,136 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:39,136 INFO L82 PathProgramCache]: Analyzing trace with hash -535397893, now seen corresponding path program 3 times [2021-05-21 15:22:39,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:39,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674233474] [2021-05-21 15:22:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:39,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:39,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674233474] [2021-05-21 15:22:39,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674233474] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:39,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:39,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:22:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880185462] [2021-05-21 15:22:39,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:22:39,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:39,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:22:39,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:22:39,223 INFO L87 Difference]: Start difference. First operand 1731 states and 4684 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:39,382 INFO L93 Difference]: Finished difference Result 3149 states and 8380 transitions. [2021-05-21 15:22:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:22:39,383 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 15:22:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:39,394 INFO L225 Difference]: With dead ends: 3149 [2021-05-21 15:22:39,394 INFO L226 Difference]: Without dead ends: 2834 [2021-05-21 15:22:39,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-05-21 15:22:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1941. [2021-05-21 15:22:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.6943298969072167) internal successors, (5227), 1940 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5227 transitions. [2021-05-21 15:22:39,447 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5227 transitions. Word has length 42 [2021-05-21 15:22:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:39,447 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5227 transitions. [2021-05-21 15:22:39,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5227 transitions. [2021-05-21 15:22:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:39,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:39,450 INFO L521 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, 1, 1] [2021-05-21 15:22:39,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 15:22:39,451 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:39,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:39,451 INFO L82 PathProgramCache]: Analyzing trace with hash 847069600, now seen corresponding path program 1 times [2021-05-21 15:22:39,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:39,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338654168] [2021-05-21 15:22:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:39,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:39,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338654168] [2021-05-21 15:22:39,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338654168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:39,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184699529] [2021-05-21 15:22:39,543 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 [2021-05-21 15:22:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:39,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:39,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:39,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184699529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:39,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:39,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:39,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57494090] [2021-05-21 15:22:39,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:39,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:39,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:39,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:39,969 INFO L87 Difference]: Start difference. First operand 1941 states and 5227 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:40,229 INFO L93 Difference]: Finished difference Result 3261 states and 8492 transitions. [2021-05-21 15:22:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:22:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:40,241 INFO L225 Difference]: With dead ends: 3261 [2021-05-21 15:22:40,241 INFO L226 Difference]: Without dead ends: 2781 [2021-05-21 15:22:40,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:22:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-05-21 15:22:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2030. [2021-05-21 15:22:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 2.6638738294726467) internal successors, (5405), 2029 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5405 transitions. [2021-05-21 15:22:40,294 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5405 transitions. Word has length 47 [2021-05-21 15:22:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:40,294 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 5405 transitions. [2021-05-21 15:22:40,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5405 transitions. [2021-05-21 15:22:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:40,297 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:40,298 INFO L521 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, 1, 1] [2021-05-21 15:22:40,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-21 15:22:40,513 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:40,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:40,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1597229004, now seen corresponding path program 2 times [2021-05-21 15:22:40,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:40,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933129957] [2021-05-21 15:22:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:40,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:40,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933129957] [2021-05-21 15:22:40,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933129957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:40,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118072189] [2021-05-21 15:22:40,636 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 [2021-05-21 15:22:40,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:40,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:40,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:40,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118072189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:40,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:40,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:40,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439249257] [2021-05-21 15:22:40,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:40,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:40,928 INFO L87 Difference]: Start difference. First operand 2030 states and 5405 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:41,109 INFO L93 Difference]: Finished difference Result 3013 states and 7804 transitions. [2021-05-21 15:22:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 15:22:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:41,128 INFO L225 Difference]: With dead ends: 3013 [2021-05-21 15:22:41,128 INFO L226 Difference]: Without dead ends: 2861 [2021-05-21 15:22:41,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:22:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-05-21 15:22:41,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2064. [2021-05-21 15:22:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.6539020843431897) internal successors, (5475), 2063 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5475 transitions. [2021-05-21 15:22:41,185 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5475 transitions. Word has length 47 [2021-05-21 15:22:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:41,186 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5475 transitions. [2021-05-21 15:22:41,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5475 transitions. [2021-05-21 15:22:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:41,190 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:41,191 INFO L521 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, 1, 1] [2021-05-21 15:22:41,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:41,414 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1224443028, now seen corresponding path program 3 times [2021-05-21 15:22:41,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:41,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584458543] [2021-05-21 15:22:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:41,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:41,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584458543] [2021-05-21 15:22:41,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584458543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:41,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423964658] [2021-05-21 15:22:41,529 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 [2021-05-21 15:22:41,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 15:22:41,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:41,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:41,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423964658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:41,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:41,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:41,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701828005] [2021-05-21 15:22:41,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:41,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:41,776 INFO L87 Difference]: Start difference. First operand 2064 states and 5475 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:42,002 INFO L93 Difference]: Finished difference Result 3525 states and 9020 transitions. [2021-05-21 15:22:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:22:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:42,010 INFO L225 Difference]: With dead ends: 3525 [2021-05-21 15:22:42,010 INFO L226 Difference]: Without dead ends: 3045 [2021-05-21 15:22:42,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:22:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-05-21 15:22:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2094. [2021-05-21 15:22:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 2.661729574773053) internal successors, (5571), 2093 states have internal predecessors, (5571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5571 transitions. [2021-05-21 15:22:42,066 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5571 transitions. Word has length 47 [2021-05-21 15:22:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:42,066 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5571 transitions. [2021-05-21 15:22:42,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5571 transitions. [2021-05-21 15:22:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:42,070 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:42,070 INFO L521 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, 1, 1] [2021-05-21 15:22:42,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 15:22:42,292 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:42,293 INFO L82 PathProgramCache]: Analyzing trace with hash 511209706, now seen corresponding path program 4 times [2021-05-21 15:22:42,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:42,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128801624] [2021-05-21 15:22:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:42,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:42,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128801624] [2021-05-21 15:22:42,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128801624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:42,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114834120] [2021-05-21 15:22:42,376 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 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 [2021-05-21 15:22:42,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:42,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:42,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:42,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:42,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114834120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:42,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:42,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:42,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209755071] [2021-05-21 15:22:42,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:42,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:42,624 INFO L87 Difference]: Start difference. First operand 2094 states and 5571 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:42,980 INFO L93 Difference]: Finished difference Result 4570 states and 11964 transitions. [2021-05-21 15:22:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:22:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:42,989 INFO L225 Difference]: With dead ends: 4570 [2021-05-21 15:22:42,989 INFO L226 Difference]: Without dead ends: 3833 [2021-05-21 15:22:42,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:22:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-05-21 15:22:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2235. [2021-05-21 15:22:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 2.6965085049239033) internal successors, (6024), 2234 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6024 transitions. [2021-05-21 15:22:43,052 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6024 transitions. Word has length 47 [2021-05-21 15:22:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:43,052 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 6024 transitions. [2021-05-21 15:22:43,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6024 transitions. [2021-05-21 15:22:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:43,056 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:43,056 INFO L521 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, 1, 1] [2021-05-21 15:22:43,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:43,279 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:43,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:43,280 INFO L82 PathProgramCache]: Analyzing trace with hash 464719534, now seen corresponding path program 5 times [2021-05-21 15:22:43,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:43,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311757703] [2021-05-21 15:22:43,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:43,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:43,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311757703] [2021-05-21 15:22:43,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311757703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:43,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462262527] [2021-05-21 15:22:43,401 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 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 [2021-05-21 15:22:43,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:43,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:43,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:43,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462262527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:43,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:43,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:43,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330106811] [2021-05-21 15:22:43,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:43,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:43,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:43,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:43,640 INFO L87 Difference]: Start difference. First operand 2235 states and 6024 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:43,966 INFO L93 Difference]: Finished difference Result 4350 states and 11284 transitions. [2021-05-21 15:22:43,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:22:43,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:43,975 INFO L225 Difference]: With dead ends: 4350 [2021-05-21 15:22:43,975 INFO L226 Difference]: Without dead ends: 3958 [2021-05-21 15:22:43,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:22:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-05-21 15:22:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2423. [2021-05-21 15:22:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.7345169281585466) internal successors, (6623), 2422 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-05-21 15:22:44,058 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-05-21 15:22:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:44,059 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-05-21 15:22:44,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-05-21 15:22:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:44,063 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:44,063 INFO L521 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, 1, 1] [2021-05-21 15:22:44,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:44,289 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:44,289 INFO L82 PathProgramCache]: Analyzing trace with hash 920243988, now seen corresponding path program 6 times [2021-05-21 15:22:44,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:44,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570953366] [2021-05-21 15:22:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:44,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:44,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570953366] [2021-05-21 15:22:44,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570953366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:44,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113878341] [2021-05-21 15:22:44,377 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 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 [2021-05-21 15:22:44,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 15:22:44,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:44,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:44,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113878341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:44,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:44,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:44,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677905135] [2021-05-21 15:22:44,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:44,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:44,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:44,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:44,638 INFO L87 Difference]: Start difference. First operand 2423 states and 6623 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:45,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:45,298 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-05-21 15:22:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:22:45,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:45,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:45,310 INFO L225 Difference]: With dead ends: 5771 [2021-05-21 15:22:45,310 INFO L226 Difference]: Without dead ends: 4898 [2021-05-21 15:22:45,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:22:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-05-21 15:22:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-05-21 15:22:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.7169744318181817) internal successors, (7651), 2816 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-05-21 15:22:45,388 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-05-21 15:22:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:45,388 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-05-21 15:22:45,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-05-21 15:22:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:45,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:45,393 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:22:45,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:45,613 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash 117458473, now seen corresponding path program 7 times [2021-05-21 15:22:45,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:45,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459228889] [2021-05-21 15:22:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:45,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:45,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459228889] [2021-05-21 15:22:45,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459228889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:45,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960148226] [2021-05-21 15:22:45,718 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 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 [2021-05-21 15:22:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:45,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:45,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:45,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960148226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:45,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:45,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:45,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898820987] [2021-05-21 15:22:45,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:45,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:45,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:45,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:45,991 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:46,195 INFO L93 Difference]: Finished difference Result 4071 states and 10562 transitions. [2021-05-21 15:22:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 15:22:46,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:46,203 INFO L225 Difference]: With dead ends: 4071 [2021-05-21 15:22:46,204 INFO L226 Difference]: Without dead ends: 3919 [2021-05-21 15:22:46,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:22:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2021-05-21 15:22:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 2867. [2021-05-21 15:22:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2866 states have (on average 2.7079553384508026) internal successors, (7761), 2866 states have internal predecessors, (7761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 7761 transitions. [2021-05-21 15:22:46,264 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 7761 transitions. Word has length 52 [2021-05-21 15:22:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:46,264 INFO L482 AbstractCegarLoop]: Abstraction has 2867 states and 7761 transitions. [2021-05-21 15:22:46,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 7761 transitions. [2021-05-21 15:22:46,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:46,269 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:46,269 INFO L521 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, 1, 1] [2021-05-21 15:22:46,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 15:22:46,485 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:46,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1743674851, now seen corresponding path program 1 times [2021-05-21 15:22:46,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:46,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361307135] [2021-05-21 15:22:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:46,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:46,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361307135] [2021-05-21 15:22:46,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361307135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:46,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984712501] [2021-05-21 15:22:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 15:22:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:46,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:46,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984712501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:46,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:46,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:46,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927089853] [2021-05-21 15:22:46,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:46,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:46,854 INFO L87 Difference]: Start difference. First operand 2867 states and 7761 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:47,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:47,095 INFO L93 Difference]: Finished difference Result 4087 states and 10594 transitions. [2021-05-21 15:22:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:22:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:47,104 INFO L225 Difference]: With dead ends: 4087 [2021-05-21 15:22:47,104 INFO L226 Difference]: Without dead ends: 3935 [2021-05-21 15:22:47,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 243.2ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:22:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-05-21 15:22:47,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 2917. [2021-05-21 15:22:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 2.6992455418381343) internal successors, (7871), 2916 states have internal predecessors, (7871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 7871 transitions. [2021-05-21 15:22:47,166 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 7871 transitions. Word has length 52 [2021-05-21 15:22:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:47,166 INFO L482 AbstractCegarLoop]: Abstraction has 2917 states and 7871 transitions. [2021-05-21 15:22:47,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 7871 transitions. [2021-05-21 15:22:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:47,171 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:47,171 INFO L521 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, 1, 1] [2021-05-21 15:22:47,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 15:22:47,385 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1270346633, now seen corresponding path program 2 times [2021-05-21 15:22:47,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:47,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618102725] [2021-05-21 15:22:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:47,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:47,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618102725] [2021-05-21 15:22:47,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618102725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:47,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994082684] [2021-05-21 15:22:47,470 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 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 [2021-05-21 15:22:47,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:47,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:47,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:47,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:47,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994082684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:47,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:47,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:47,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737992831] [2021-05-21 15:22:47,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:47,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:47,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:47,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:47,708 INFO L87 Difference]: Start difference. First operand 2917 states and 7871 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:47,902 INFO L93 Difference]: Finished difference Result 3927 states and 10274 transitions. [2021-05-21 15:22:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:22:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:47,911 INFO L225 Difference]: With dead ends: 3927 [2021-05-21 15:22:47,911 INFO L226 Difference]: Without dead ends: 3775 [2021-05-21 15:22:47,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:22:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-05-21 15:22:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2916. [2021-05-21 15:22:47,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 2.697770154373928) internal successors, (7864), 2915 states have internal predecessors, (7864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 7864 transitions. [2021-05-21 15:22:47,989 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 7864 transitions. Word has length 52 [2021-05-21 15:22:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:47,990 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 7864 transitions. [2021-05-21 15:22:47,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:47,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 7864 transitions. [2021-05-21 15:22:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:47,994 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:47,995 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:22:48,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 15:22:48,209 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1887847499, now seen corresponding path program 8 times [2021-05-21 15:22:48,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:48,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731564935] [2021-05-21 15:22:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:48,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731564935] [2021-05-21 15:22:48,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731564935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128715565] [2021-05-21 15:22:48,293 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 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 [2021-05-21 15:22:48,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:48,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:48,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:48,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128715565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:48,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:48,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:48,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144703516] [2021-05-21 15:22:48,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:48,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:48,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:48,519 INFO L87 Difference]: Start difference. First operand 2916 states and 7864 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:48,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:48,722 INFO L93 Difference]: Finished difference Result 4236 states and 10907 transitions. [2021-05-21 15:22:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:22:48,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:48,731 INFO L225 Difference]: With dead ends: 4236 [2021-05-21 15:22:48,731 INFO L226 Difference]: Without dead ends: 4084 [2021-05-21 15:22:48,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:22:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2021-05-21 15:22:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 2891. [2021-05-21 15:22:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2890 states have (on average 2.702076124567474) internal successors, (7809), 2890 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 7809 transitions. [2021-05-21 15:22:48,788 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 7809 transitions. Word has length 52 [2021-05-21 15:22:48,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:48,788 INFO L482 AbstractCegarLoop]: Abstraction has 2891 states and 7809 transitions. [2021-05-21 15:22:48,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 7809 transitions. [2021-05-21 15:22:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:48,793 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:48,793 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:22:49,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 15:22:49,009 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash -275953247, now seen corresponding path program 9 times [2021-05-21 15:22:49,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:49,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381791326] [2021-05-21 15:22:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:49,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:49,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381791326] [2021-05-21 15:22:49,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381791326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:49,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859449229] [2021-05-21 15:22:49,089 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 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 [2021-05-21 15:22:49,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:22:49,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:49,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:49,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:49,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859449229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:49,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:49,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:49,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676337811] [2021-05-21 15:22:49,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:49,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:49,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:49,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:49,316 INFO L87 Difference]: Start difference. First operand 2891 states and 7809 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:49,697 INFO L93 Difference]: Finished difference Result 5047 states and 13218 transitions. [2021-05-21 15:22:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:22:49,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:49,705 INFO L225 Difference]: With dead ends: 5047 [2021-05-21 15:22:49,706 INFO L226 Difference]: Without dead ends: 4743 [2021-05-21 15:22:49,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:22:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4743 states. [2021-05-21 15:22:49,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4743 to 3086. [2021-05-21 15:22:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 3085 states have (on average 2.7354943273905996) internal successors, (8439), 3085 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 8439 transitions. [2021-05-21 15:22:49,769 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 8439 transitions. Word has length 52 [2021-05-21 15:22:49,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:49,769 INFO L482 AbstractCegarLoop]: Abstraction has 3086 states and 8439 transitions. [2021-05-21 15:22:49,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 8439 transitions. [2021-05-21 15:22:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:49,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:49,775 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:22:49,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 15:22:49,999 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:49,999 INFO L82 PathProgramCache]: Analyzing trace with hash 179571207, now seen corresponding path program 10 times [2021-05-21 15:22:49,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:50,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818612257] [2021-05-21 15:22:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:50,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:50,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818612257] [2021-05-21 15:22:50,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818612257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:50,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755691825] [2021-05-21 15:22:50,076 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 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 [2021-05-21 15:22:50,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:50,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:50,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:50,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:50,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755691825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:50,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:50,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:50,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66959344] [2021-05-21 15:22:50,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:50,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:50,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:50,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:50,309 INFO L87 Difference]: Start difference. First operand 3086 states and 8439 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:50,935 INFO L93 Difference]: Finished difference Result 6180 states and 16594 transitions. [2021-05-21 15:22:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:22:50,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:50,944 INFO L225 Difference]: With dead ends: 6180 [2021-05-21 15:22:50,945 INFO L226 Difference]: Without dead ends: 5504 [2021-05-21 15:22:50,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 543.0ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:22:50,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2021-05-21 15:22:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 3235. [2021-05-21 15:22:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3234 states have (on average 2.7680890538033394) internal successors, (8952), 3234 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 8952 transitions. [2021-05-21 15:22:51,006 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 8952 transitions. Word has length 52 [2021-05-21 15:22:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:51,006 INFO L482 AbstractCegarLoop]: Abstraction has 3235 states and 8952 transitions. [2021-05-21 15:22:51,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 8952 transitions. [2021-05-21 15:22:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:51,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:51,012 INFO L521 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, 1, 1] [2021-05-21 15:22:51,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:51,234 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash -97531933, now seen corresponding path program 3 times [2021-05-21 15:22:51,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:51,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880001049] [2021-05-21 15:22:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:51,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:51,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880001049] [2021-05-21 15:22:51,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880001049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:51,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609358998] [2021-05-21 15:22:51,343 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 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 [2021-05-21 15:22:51,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:22:51,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:51,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:51,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:51,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609358998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:51,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:51,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:51,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76844598] [2021-05-21 15:22:51,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:51,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:51,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:51,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:51,591 INFO L87 Difference]: Start difference. First operand 3235 states and 8952 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:51,919 INFO L93 Difference]: Finished difference Result 5014 states and 13181 transitions. [2021-05-21 15:22:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:22:51,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:51,938 INFO L225 Difference]: With dead ends: 5014 [2021-05-21 15:22:51,938 INFO L226 Difference]: Without dead ends: 4862 [2021-05-21 15:22:51,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:22:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-05-21 15:22:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 3275. [2021-05-21 15:22:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 2.775809407452657) internal successors, (9088), 3274 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 9088 transitions. [2021-05-21 15:22:52,002 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 9088 transitions. Word has length 52 [2021-05-21 15:22:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:52,002 INFO L482 AbstractCegarLoop]: Abstraction has 3275 states and 9088 transitions. [2021-05-21 15:22:52,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 9088 transitions. [2021-05-21 15:22:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:52,007 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:52,007 INFO L521 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, 1, 1] [2021-05-21 15:22:52,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-21 15:22:52,221 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1811410767, now seen corresponding path program 4 times [2021-05-21 15:22:52,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:52,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814928157] [2021-05-21 15:22:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:52,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:52,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814928157] [2021-05-21 15:22:52,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814928157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:52,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754347720] [2021-05-21 15:22:52,310 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 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 [2021-05-21 15:22:52,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:52,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:52,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:52,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:52,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754347720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:52,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:52,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:52,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320284883] [2021-05-21 15:22:52,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:52,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:52,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:52,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:52,547 INFO L87 Difference]: Start difference. First operand 3275 states and 9088 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:52,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:52,874 INFO L93 Difference]: Finished difference Result 5278 states and 14184 transitions. [2021-05-21 15:22:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:22:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:52,892 INFO L225 Difference]: With dead ends: 5278 [2021-05-21 15:22:52,892 INFO L226 Difference]: Without dead ends: 5126 [2021-05-21 15:22:52,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:22:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-05-21 15:22:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3363. [2021-05-21 15:22:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.796252230814991) internal successors, (9401), 3362 states have internal predecessors, (9401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9401 transitions. [2021-05-21 15:22:52,993 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9401 transitions. Word has length 52 [2021-05-21 15:22:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:52,993 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9401 transitions. [2021-05-21 15:22:52,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9401 transitions. [2021-05-21 15:22:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:52,998 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:52,998 INFO L521 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, 1, 1] [2021-05-21 15:22:53,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:53,213 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1680986989, now seen corresponding path program 5 times [2021-05-21 15:22:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:53,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279733919] [2021-05-21 15:22:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:53,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:53,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279733919] [2021-05-21 15:22:53,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279733919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:53,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857249391] [2021-05-21 15:22:53,310 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 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 [2021-05-21 15:22:53,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:22:53,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:53,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:53,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:53,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857249391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:53,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:53,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:53,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740296817] [2021-05-21 15:22:53,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:53,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:53,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:53,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:53,531 INFO L87 Difference]: Start difference. First operand 3363 states and 9401 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:54,182 INFO L93 Difference]: Finished difference Result 6683 states and 18179 transitions. [2021-05-21 15:22:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:22:54,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:54,192 INFO L225 Difference]: With dead ends: 6683 [2021-05-21 15:22:54,192 INFO L226 Difference]: Without dead ends: 6253 [2021-05-21 15:22:54,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 586.9ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:22:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-05-21 15:22:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3417. [2021-05-21 15:22:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 2.768735362997658) internal successors, (9458), 3416 states have internal predecessors, (9458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-05-21 15:22:54,263 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 52 [2021-05-21 15:22:54,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:54,263 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-05-21 15:22:54,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-05-21 15:22:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:54,267 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:54,267 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:22:54,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 15:22:54,490 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:54,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1005538624, now seen corresponding path program 11 times [2021-05-21 15:22:54,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:54,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736889898] [2021-05-21 15:22:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:54,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:54,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736889898] [2021-05-21 15:22:54,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736889898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:54,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91157987] [2021-05-21 15:22:54,591 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 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 [2021-05-21 15:22:54,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:22:54,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:54,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:54,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91157987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:54,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:54,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:54,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982686999] [2021-05-21 15:22:54,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:54,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:54,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:54,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:54,841 INFO L87 Difference]: Start difference. First operand 3417 states and 9458 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:55,015 INFO L93 Difference]: Finished difference Result 4779 states and 12701 transitions. [2021-05-21 15:22:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 15:22:55,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:55,023 INFO L225 Difference]: With dead ends: 4779 [2021-05-21 15:22:55,023 INFO L226 Difference]: Without dead ends: 4627 [2021-05-21 15:22:55,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:22:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-05-21 15:22:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3492. [2021-05-21 15:22:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-05-21 15:22:55,078 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-05-21 15:22:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:55,078 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-05-21 15:22:55,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-05-21 15:22:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:55,082 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:55,083 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:22:55,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:55,297 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash 845130068, now seen corresponding path program 12 times [2021-05-21 15:22:55,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:55,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669129926] [2021-05-21 15:22:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:55,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:55,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669129926] [2021-05-21 15:22:55,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669129926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:55,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240544244] [2021-05-21 15:22:55,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 15:22:55,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:22:55,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:55,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:55,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:55,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240544244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:55,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:55,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:55,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122123920] [2021-05-21 15:22:55,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:55,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:55,679 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:55,922 INFO L93 Difference]: Finished difference Result 4955 states and 13053 transitions. [2021-05-21 15:22:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:22:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:55,927 INFO L225 Difference]: With dead ends: 4955 [2021-05-21 15:22:55,927 INFO L226 Difference]: Without dead ends: 4803 [2021-05-21 15:22:55,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:22:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-05-21 15:22:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3492. [2021-05-21 15:22:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-05-21 15:22:55,971 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-05-21 15:22:55,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:55,971 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-05-21 15:22:55,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-05-21 15:22:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:55,975 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:55,975 INFO L521 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, 1, 1] [2021-05-21 15:22:56,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 15:22:56,180 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:56,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1016003256, now seen corresponding path program 6 times [2021-05-21 15:22:56,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:56,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146570467] [2021-05-21 15:22:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:56,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:56,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146570467] [2021-05-21 15:22:56,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146570467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:56,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438564549] [2021-05-21 15:22:56,290 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 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 [2021-05-21 15:22:56,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 15:22:56,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:56,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:56,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:56,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438564549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:56,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:56,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:56,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680182056] [2021-05-21 15:22:56,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:56,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:56,543 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:56,812 INFO L93 Difference]: Finished difference Result 5019 states and 13181 transitions. [2021-05-21 15:22:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:22:56,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:56,818 INFO L225 Difference]: With dead ends: 5019 [2021-05-21 15:22:56,818 INFO L226 Difference]: Without dead ends: 4867 [2021-05-21 15:22:56,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:22:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4867 states. [2021-05-21 15:22:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4867 to 3557. [2021-05-21 15:22:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3557 states, 3556 states have (on average 2.7455005624296964) internal successors, (9763), 3556 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3557 states to 3557 states and 9763 transitions. [2021-05-21 15:22:56,880 INFO L78 Accepts]: Start accepts. Automaton has 3557 states and 9763 transitions. Word has length 57 [2021-05-21 15:22:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:56,881 INFO L482 AbstractCegarLoop]: Abstraction has 3557 states and 9763 transitions. [2021-05-21 15:22:56,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3557 states and 9763 transitions. [2021-05-21 15:22:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:56,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:56,886 INFO L521 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, 1, 1] [2021-05-21 15:22:57,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 15:22:57,094 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:57,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:57,095 INFO L82 PathProgramCache]: Analyzing trace with hash -542675038, now seen corresponding path program 7 times [2021-05-21 15:22:57,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:57,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249949433] [2021-05-21 15:22:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:57,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:57,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249949433] [2021-05-21 15:22:57,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249949433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:57,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318113956] [2021-05-21 15:22:57,184 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 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 [2021-05-21 15:22:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:57,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:57,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:57,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318113956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:57,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:57,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:57,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928504729] [2021-05-21 15:22:57,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:57,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:57,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:57,449 INFO L87 Difference]: Start difference. First operand 3557 states and 9763 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:57,674 INFO L93 Difference]: Finished difference Result 4869 states and 12883 transitions. [2021-05-21 15:22:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:22:57,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:57,679 INFO L225 Difference]: With dead ends: 4869 [2021-05-21 15:22:57,679 INFO L226 Difference]: Without dead ends: 4717 [2021-05-21 15:22:57,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:22:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4717 states. [2021-05-21 15:22:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4717 to 3522. [2021-05-21 15:22:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3521 states have (on average 2.750923033229196) internal successors, (9686), 3521 states have internal predecessors, (9686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 9686 transitions. [2021-05-21 15:22:57,737 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 9686 transitions. Word has length 57 [2021-05-21 15:22:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:57,737 INFO L482 AbstractCegarLoop]: Abstraction has 3522 states and 9686 transitions. [2021-05-21 15:22:57,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 9686 transitions. [2021-05-21 15:22:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:57,742 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:57,743 INFO L521 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, 1, 1] [2021-05-21 15:22:57,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 15:22:57,957 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash 509542868, now seen corresponding path program 8 times [2021-05-21 15:22:57,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:57,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393434615] [2021-05-21 15:22:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:58,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:58,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393434615] [2021-05-21 15:22:58,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393434615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:58,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362608642] [2021-05-21 15:22:58,043 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 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 [2021-05-21 15:22:58,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:58,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:58,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:58,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:58,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362608642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:58,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:58,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:58,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55004382] [2021-05-21 15:22:58,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:58,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:58,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:58,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:58,295 INFO L87 Difference]: Start difference. First operand 3522 states and 9686 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:58,561 INFO L93 Difference]: Finished difference Result 5051 states and 13245 transitions. [2021-05-21 15:22:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:22:58,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:58,566 INFO L225 Difference]: With dead ends: 5051 [2021-05-21 15:22:58,566 INFO L226 Difference]: Without dead ends: 4899 [2021-05-21 15:22:58,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:22:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-05-21 15:22:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 3627. [2021-05-21 15:22:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.7349696635410923) internal successors, (9917), 3626 states have internal predecessors, (9917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 9917 transitions. [2021-05-21 15:22:58,608 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 9917 transitions. Word has length 57 [2021-05-21 15:22:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:58,608 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 9917 transitions. [2021-05-21 15:22:58,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:58,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 9917 transitions. [2021-05-21 15:22:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:58,612 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:58,612 INFO L521 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, 1, 1] [2021-05-21 15:22:58,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 15:22:58,819 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:58,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:58,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1535792180, now seen corresponding path program 9 times [2021-05-21 15:22:58,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:58,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514641860] [2021-05-21 15:22:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:58,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:58,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514641860] [2021-05-21 15:22:58,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514641860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:58,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062870362] [2021-05-21 15:22:58,916 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 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 [2021-05-21 15:22:59,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:22:59,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:59,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:59,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062870362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:59,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:59,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:59,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489134814] [2021-05-21 15:22:59,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:59,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:59,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:59,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:59,187 INFO L87 Difference]: Start difference. First operand 3627 states and 9917 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:59,497 INFO L93 Difference]: Finished difference Result 5155 states and 13453 transitions. [2021-05-21 15:22:59,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:22:59,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:59,503 INFO L225 Difference]: With dead ends: 5155 [2021-05-21 15:22:59,503 INFO L226 Difference]: Without dead ends: 5003 [2021-05-21 15:22:59,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:22:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2021-05-21 15:22:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 3611. [2021-05-21 15:22:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 2.735180055401662) internal successors, (9874), 3610 states have internal predecessors, (9874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 9874 transitions. [2021-05-21 15:22:59,549 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 9874 transitions. Word has length 57 [2021-05-21 15:22:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:59,549 INFO L482 AbstractCegarLoop]: Abstraction has 3611 states and 9874 transitions. [2021-05-21 15:22:59,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 9874 transitions. [2021-05-21 15:22:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:59,554 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:59,555 INFO L521 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, 1, 1] [2021-05-21 15:22:59,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 15:22:59,757 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:59,757 INFO L82 PathProgramCache]: Analyzing trace with hash -723248218, now seen corresponding path program 10 times [2021-05-21 15:22:59,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:59,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328370941] [2021-05-21 15:22:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:59,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:59,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328370941] [2021-05-21 15:22:59,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328370941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:59,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678670091] [2021-05-21 15:22:59,843 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 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 [2021-05-21 15:22:59,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:59,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:59,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:59,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:00,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678670091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:00,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:00,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:00,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691119744] [2021-05-21 15:23:00,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:00,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:00,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:00,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:00,116 INFO L87 Difference]: Start difference. First operand 3611 states and 9874 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:00,415 INFO L93 Difference]: Finished difference Result 5139 states and 13421 transitions. [2021-05-21 15:23:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:23:00,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:00,420 INFO L225 Difference]: With dead ends: 5139 [2021-05-21 15:23:00,420 INFO L226 Difference]: Without dead ends: 4987 [2021-05-21 15:23:00,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:23:00,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-05-21 15:23:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3556. [2021-05-21 15:23:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.7443037974683544) internal successors, (9756), 3555 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9756 transitions. [2021-05-21 15:23:00,465 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9756 transitions. Word has length 57 [2021-05-21 15:23:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:00,466 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9756 transitions. [2021-05-21 15:23:00,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:00,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9756 transitions. [2021-05-21 15:23:00,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:00,469 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:00,469 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:23:00,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:00,669 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash 891212980, now seen corresponding path program 13 times [2021-05-21 15:23:00,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:00,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282788012] [2021-05-21 15:23:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:00,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:00,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282788012] [2021-05-21 15:23:00,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282788012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:00,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092012468] [2021-05-21 15:23:00,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 15:23:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:00,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:00,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092012468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:00,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:00,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:00,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047631920] [2021-05-21 15:23:00,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:00,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:00,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:00,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:00,995 INFO L87 Difference]: Start difference. First operand 3556 states and 9756 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:01,176 INFO L93 Difference]: Finished difference Result 4988 states and 13124 transitions. [2021-05-21 15:23:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:23:01,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:01,181 INFO L225 Difference]: With dead ends: 4988 [2021-05-21 15:23:01,182 INFO L226 Difference]: Without dead ends: 4836 [2021-05-21 15:23:01,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:23:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2021-05-21 15:23:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 3606. [2021-05-21 15:23:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.736754507628294) internal successors, (9866), 3605 states have internal predecessors, (9866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9866 transitions. [2021-05-21 15:23:01,234 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9866 transitions. Word has length 57 [2021-05-21 15:23:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:01,235 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9866 transitions. [2021-05-21 15:23:01,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9866 transitions. [2021-05-21 15:23:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:01,239 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:01,239 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:23:01,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-21 15:23:01,439 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:01,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1553085624, now seen corresponding path program 14 times [2021-05-21 15:23:01,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:01,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594684320] [2021-05-21 15:23:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:01,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:01,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594684320] [2021-05-21 15:23:01,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594684320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:01,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000174789] [2021-05-21 15:23:01,531 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 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 [2021-05-21 15:23:01,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:23:01,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:01,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:01,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:01,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000174789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:01,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:01,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:01,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591741584] [2021-05-21 15:23:01,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:01,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:01,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:01,817 INFO L87 Difference]: Start difference. First operand 3606 states and 9866 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:02,062 INFO L93 Difference]: Finished difference Result 5229 states and 13611 transitions. [2021-05-21 15:23:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:23:02,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:02,071 INFO L225 Difference]: With dead ends: 5229 [2021-05-21 15:23:02,071 INFO L226 Difference]: Without dead ends: 5077 [2021-05-21 15:23:02,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:23:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5077 states. [2021-05-21 15:23:02,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5077 to 3606. [2021-05-21 15:23:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.736754507628294) internal successors, (9866), 3605 states have internal predecessors, (9866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9866 transitions. [2021-05-21 15:23:02,125 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9866 transitions. Word has length 57 [2021-05-21 15:23:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:02,125 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9866 transitions. [2021-05-21 15:23:02,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9866 transitions. [2021-05-21 15:23:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:02,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:02,131 INFO L521 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, 1, 1] [2021-05-21 15:23:02,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:02,342 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash 880748348, now seen corresponding path program 11 times [2021-05-21 15:23:02,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:02,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662594071] [2021-05-21 15:23:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:02,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:02,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662594071] [2021-05-21 15:23:02,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662594071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:02,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429010316] [2021-05-21 15:23:02,432 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 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 [2021-05-21 15:23:02,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:23:02,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:02,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429010316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:02,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:02,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:02,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051951488] [2021-05-21 15:23:02,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:02,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:02,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:02,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:02,667 INFO L87 Difference]: Start difference. First operand 3606 states and 9866 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:02,955 INFO L93 Difference]: Finished difference Result 5364 states and 13876 transitions. [2021-05-21 15:23:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:23:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:02,960 INFO L225 Difference]: With dead ends: 5364 [2021-05-21 15:23:02,961 INFO L226 Difference]: Without dead ends: 5212 [2021-05-21 15:23:02,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:23:02,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5212 states. [2021-05-21 15:23:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5212 to 3606. [2021-05-21 15:23:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.736754507628294) internal successors, (9866), 3605 states have internal predecessors, (9866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9866 transitions. [2021-05-21 15:23:03,010 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9866 transitions. Word has length 57 [2021-05-21 15:23:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:03,011 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9866 transitions. [2021-05-21 15:23:03,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9866 transitions. [2021-05-21 15:23:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:03,014 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:03,014 INFO L521 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, 1, 1] [2021-05-21 15:23:03,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-21 15:23:03,214 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:03,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:03,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1354076566, now seen corresponding path program 12 times [2021-05-21 15:23:03,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:03,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370532367] [2021-05-21 15:23:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:03,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:03,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370532367] [2021-05-21 15:23:03,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370532367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:03,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200397879] [2021-05-21 15:23:03,301 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 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 [2021-05-21 15:23:03,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:23:03,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:03,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:03,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:03,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200397879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:03,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:03,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:03,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272501630] [2021-05-21 15:23:03,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:03,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:03,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:03,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:03,551 INFO L87 Difference]: Start difference. First operand 3606 states and 9866 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:03,827 INFO L93 Difference]: Finished difference Result 5139 states and 13421 transitions. [2021-05-21 15:23:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:23:03,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:03,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:03,833 INFO L225 Difference]: With dead ends: 5139 [2021-05-21 15:23:03,833 INFO L226 Difference]: Without dead ends: 4987 [2021-05-21 15:23:03,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:23:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-05-21 15:23:03,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3531. [2021-05-21 15:23:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.7481586402266287) internal successors, (9701), 3530 states have internal predecessors, (9701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:03,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9701 transitions. [2021-05-21 15:23:03,892 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9701 transitions. Word has length 57 [2021-05-21 15:23:03,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:03,892 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9701 transitions. [2021-05-21 15:23:03,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:03,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9701 transitions. [2021-05-21 15:23:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:03,896 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:03,896 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:23:04,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:04,109 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:04,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:04,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1028549134, now seen corresponding path program 15 times [2021-05-21 15:23:04,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:04,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37983131] [2021-05-21 15:23:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:04,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37983131] [2021-05-21 15:23:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37983131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771947600] [2021-05-21 15:23:04,194 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 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 [2021-05-21 15:23:04,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 15:23:04,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:04,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:04,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:04,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771947600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:04,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:04,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:04,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997368498] [2021-05-21 15:23:04,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:04,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:04,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:04,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:04,428 INFO L87 Difference]: Start difference. First operand 3531 states and 9701 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:04,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:04,615 INFO L93 Difference]: Finished difference Result 5043 states and 13259 transitions. [2021-05-21 15:23:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:23:04,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:04,621 INFO L225 Difference]: With dead ends: 5043 [2021-05-21 15:23:04,621 INFO L226 Difference]: Without dead ends: 4891 [2021-05-21 15:23:04,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:23:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-05-21 15:23:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3556. [2021-05-21 15:23:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.7443037974683544) internal successors, (9756), 3555 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9756 transitions. [2021-05-21 15:23:04,663 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9756 transitions. Word has length 57 [2021-05-21 15:23:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:04,664 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9756 transitions. [2021-05-21 15:23:04,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:04,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9756 transitions. [2021-05-21 15:23:04,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:04,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:04,666 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:23:04,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-21 15:23:04,867 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:04,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:04,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1415749470, now seen corresponding path program 16 times [2021-05-21 15:23:04,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:04,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309170027] [2021-05-21 15:23:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:04,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:04,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309170027] [2021-05-21 15:23:04,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309170027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:04,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666689895] [2021-05-21 15:23:04,944 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 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 [2021-05-21 15:23:05,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:23:05,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:05,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:05,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666689895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:05,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:05,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:05,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504462361] [2021-05-21 15:23:05,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:05,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:05,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:05,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:05,180 INFO L87 Difference]: Start difference. First operand 3556 states and 9756 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:05,409 INFO L93 Difference]: Finished difference Result 5259 states and 13691 transitions. [2021-05-21 15:23:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:23:05,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:05,415 INFO L225 Difference]: With dead ends: 5259 [2021-05-21 15:23:05,415 INFO L226 Difference]: Without dead ends: 5107 [2021-05-21 15:23:05,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:23:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5107 states. [2021-05-21 15:23:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5107 to 3556. [2021-05-21 15:23:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.7443037974683544) internal successors, (9756), 3555 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9756 transitions. [2021-05-21 15:23:05,461 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9756 transitions. Word has length 57 [2021-05-21 15:23:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:05,461 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9756 transitions. [2021-05-21 15:23:05,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9756 transitions. [2021-05-21 15:23:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:05,464 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:05,464 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:23:05,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:05,665 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:05,665 INFO L82 PathProgramCache]: Analyzing trace with hash 955868276, now seen corresponding path program 17 times [2021-05-21 15:23:05,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:05,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669435739] [2021-05-21 15:23:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:05,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:05,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669435739] [2021-05-21 15:23:05,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669435739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:05,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764007979] [2021-05-21 15:23:05,760 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 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 [2021-05-21 15:23:05,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:23:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:05,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:05,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:05,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764007979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:05,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:05,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:05,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608711592] [2021-05-21 15:23:05,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:05,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:05,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:05,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:05,989 INFO L87 Difference]: Start difference. First operand 3556 states and 9756 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:06,179 INFO L93 Difference]: Finished difference Result 5028 states and 13234 transitions. [2021-05-21 15:23:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:23:06,179 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:06,184 INFO L225 Difference]: With dead ends: 5028 [2021-05-21 15:23:06,184 INFO L226 Difference]: Without dead ends: 4876 [2021-05-21 15:23:06,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:23:06,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-05-21 15:23:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 3531. [2021-05-21 15:23:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.7481586402266287) internal successors, (9701), 3530 states have internal predecessors, (9701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9701 transitions. [2021-05-21 15:23:06,236 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9701 transitions. Word has length 57 [2021-05-21 15:23:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:06,236 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9701 transitions. [2021-05-21 15:23:06,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9701 transitions. [2021-05-21 15:23:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:06,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:06,240 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:23:06,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 15:23:06,452 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:06,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:06,452 INFO L82 PathProgramCache]: Analyzing trace with hash -884485368, now seen corresponding path program 18 times [2021-05-21 15:23:06,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:06,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000855165] [2021-05-21 15:23:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:06,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:06,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000855165] [2021-05-21 15:23:06,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000855165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:06,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669634793] [2021-05-21 15:23:06,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 15:23:06,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:23:06,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:06,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:23:06,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:07,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669634793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:07,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:07,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:07,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557910150] [2021-05-21 15:23:07,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:07,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:07,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:07,135 INFO L87 Difference]: Start difference. First operand 3531 states and 9701 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:07,571 INFO L93 Difference]: Finished difference Result 6802 states and 18261 transitions. [2021-05-21 15:23:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:23:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:07,577 INFO L225 Difference]: With dead ends: 6802 [2021-05-21 15:23:07,577 INFO L226 Difference]: Without dead ends: 6420 [2021-05-21 15:23:07,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 592.2ms TimeCoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:23:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6420 states. [2021-05-21 15:23:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6420 to 3531. [2021-05-21 15:23:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.7481586402266287) internal successors, (9701), 3530 states have internal predecessors, (9701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9701 transitions. [2021-05-21 15:23:07,633 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9701 transitions. Word has length 57 [2021-05-21 15:23:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:07,633 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9701 transitions. [2021-05-21 15:23:07,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9701 transitions. [2021-05-21 15:23:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:07,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:07,636 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:23:07,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:07,838 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:07,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:07,838 INFO L82 PathProgramCache]: Analyzing trace with hash 196144782, now seen corresponding path program 19 times [2021-05-21 15:23:07,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:07,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747625576] [2021-05-21 15:23:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:07,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:07,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747625576] [2021-05-21 15:23:07,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747625576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:07,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257623219] [2021-05-21 15:23:07,917 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 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 [2021-05-21 15:23:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:07,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:07,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:08,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257623219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:08,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:08,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:08,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727861463] [2021-05-21 15:23:08,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:08,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:08,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:08,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:08,193 INFO L87 Difference]: Start difference. First operand 3531 states and 9701 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:08,580 INFO L93 Difference]: Finished difference Result 6221 states and 16557 transitions. [2021-05-21 15:23:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:23:08,580 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:08,587 INFO L225 Difference]: With dead ends: 6221 [2021-05-21 15:23:08,587 INFO L226 Difference]: Without dead ends: 6069 [2021-05-21 15:23:08,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:23:08,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6069 states. [2021-05-21 15:23:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6069 to 3846. [2021-05-21 15:23:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3846 states, 3845 states have (on average 2.7843953185955788) internal successors, (10706), 3845 states have internal predecessors, (10706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 10706 transitions. [2021-05-21 15:23:08,643 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 10706 transitions. Word has length 57 [2021-05-21 15:23:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:08,643 INFO L482 AbstractCegarLoop]: Abstraction has 3846 states and 10706 transitions. [2021-05-21 15:23:08,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:08,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 10706 transitions. [2021-05-21 15:23:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:08,646 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:08,646 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-21 15:23:08,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:08,848 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:08,848 INFO L82 PathProgramCache]: Analyzing trace with hash 651669236, now seen corresponding path program 20 times [2021-05-21 15:23:08,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:08,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109848207] [2021-05-21 15:23:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:08,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:08,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109848207] [2021-05-21 15:23:08,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109848207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:08,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844860964] [2021-05-21 15:23:08,926 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 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 [2021-05-21 15:23:08,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:23:08,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:08,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:08,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:09,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844860964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:09,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:09,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:09,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4751084] [2021-05-21 15:23:09,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:09,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:09,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:09,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:09,203 INFO L87 Difference]: Start difference. First operand 3846 states and 10706 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:09,820 INFO L93 Difference]: Finished difference Result 7895 states and 21363 transitions. [2021-05-21 15:23:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:23:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:09,829 INFO L225 Difference]: With dead ends: 7895 [2021-05-21 15:23:09,829 INFO L226 Difference]: Without dead ends: 7334 [2021-05-21 15:23:09,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 590.9ms TimeCoverageRelationStatistics Valid=503, Invalid=1567, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:23:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7334 states. [2021-05-21 15:23:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7334 to 3626. [2021-05-21 15:23:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 2.763034482758621) internal successors, (10016), 3625 states have internal predecessors, (10016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 10016 transitions. [2021-05-21 15:23:09,890 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 10016 transitions. Word has length 57 [2021-05-21 15:23:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:09,891 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 10016 transitions. [2021-05-21 15:23:09,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 10016 transitions. [2021-05-21 15:23:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:09,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:09,895 INFO L521 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, 1, 1] [2021-05-21 15:23:10,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-21 15:23:10,103 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:10,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:10,103 INFO L82 PathProgramCache]: Analyzing trace with hash 374566096, now seen corresponding path program 13 times [2021-05-21 15:23:10,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:10,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855140209] [2021-05-21 15:23:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:10,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:10,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855140209] [2021-05-21 15:23:10,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855140209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:10,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893545053] [2021-05-21 15:23:10,198 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 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 [2021-05-21 15:23:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:10,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:10,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:10,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893545053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:10,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:10,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:10,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219400811] [2021-05-21 15:23:10,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:10,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:10,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:10,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:10,432 INFO L87 Difference]: Start difference. First operand 3626 states and 10016 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:10,821 INFO L93 Difference]: Finished difference Result 6190 states and 16183 transitions. [2021-05-21 15:23:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:23:10,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:10,828 INFO L225 Difference]: With dead ends: 6190 [2021-05-21 15:23:10,828 INFO L226 Difference]: Without dead ends: 6038 [2021-05-21 15:23:10,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:23:10,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-05-21 15:23:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 3991. [2021-05-21 15:23:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3991 states, 3990 states have (on average 2.7897243107769425) internal successors, (11131), 3990 states have internal predecessors, (11131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 11131 transitions. [2021-05-21 15:23:10,880 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 11131 transitions. Word has length 57 [2021-05-21 15:23:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:10,880 INFO L482 AbstractCegarLoop]: Abstraction has 3991 states and 11131 transitions. [2021-05-21 15:23:10,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 11131 transitions. [2021-05-21 15:23:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:10,883 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:10,883 INFO L521 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, 1, 1] [2021-05-21 15:23:11,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:11,085 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2011458500, now seen corresponding path program 14 times [2021-05-21 15:23:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:11,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420388006] [2021-05-21 15:23:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:11,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:11,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420388006] [2021-05-21 15:23:11,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420388006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:11,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298827773] [2021-05-21 15:23:11,186 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 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 [2021-05-21 15:23:11,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:23:11,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:11,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:11,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:11,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298827773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:11,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:11,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:11,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134963843] [2021-05-21 15:23:11,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:11,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:11,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:11,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:11,487 INFO L87 Difference]: Start difference. First operand 3991 states and 11131 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:11,901 INFO L93 Difference]: Finished difference Result 6467 states and 17327 transitions. [2021-05-21 15:23:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:23:11,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:11,907 INFO L225 Difference]: With dead ends: 6467 [2021-05-21 15:23:11,908 INFO L226 Difference]: Without dead ends: 6315 [2021-05-21 15:23:11,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:23:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2021-05-21 15:23:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 4136. [2021-05-21 15:23:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4136 states, 4135 states have (on average 2.8176541717049575) internal successors, (11651), 4135 states have internal predecessors, (11651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4136 states to 4136 states and 11651 transitions. [2021-05-21 15:23:11,956 INFO L78 Accepts]: Start accepts. Automaton has 4136 states and 11651 transitions. Word has length 57 [2021-05-21 15:23:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:11,956 INFO L482 AbstractCegarLoop]: Abstraction has 4136 states and 11651 transitions. [2021-05-21 15:23:11,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4136 states and 11651 transitions. [2021-05-21 15:23:11,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:11,959 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:11,959 INFO L521 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, 1, 1] [2021-05-21 15:23:12,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-21 15:23:12,170 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1208888960, now seen corresponding path program 15 times [2021-05-21 15:23:12,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:12,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357807978] [2021-05-21 15:23:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:12,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:12,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357807978] [2021-05-21 15:23:12,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357807978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:12,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988292996] [2021-05-21 15:23:12,264 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 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 [2021-05-21 15:23:12,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:23:12,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:12,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988292996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:12,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:12,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:23:12,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132393593] [2021-05-21 15:23:12,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:23:12,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:12,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:23:12,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:23:12,483 INFO L87 Difference]: Start difference. First operand 4136 states and 11651 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:13,267 INFO L93 Difference]: Finished difference Result 8535 states and 22890 transitions. [2021-05-21 15:23:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:23:13,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:13,275 INFO L225 Difference]: With dead ends: 8535 [2021-05-21 15:23:13,276 INFO L226 Difference]: Without dead ends: 7977 [2021-05-21 15:23:13,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 689.0ms TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 15:23:13,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-05-21 15:23:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 3871. [2021-05-21 15:23:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3870 states have (on average 2.77312661498708) internal successors, (10732), 3870 states have internal predecessors, (10732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 10732 transitions. [2021-05-21 15:23:13,340 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 10732 transitions. Word has length 57 [2021-05-21 15:23:13,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:13,340 INFO L482 AbstractCegarLoop]: Abstraction has 3871 states and 10732 transitions. [2021-05-21 15:23:13,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:13,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 10732 transitions. [2021-05-21 15:23:13,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:13,344 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:13,344 INFO L521 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, 1, 1] [2021-05-21 15:23:13,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:13,545 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash -735082546, now seen corresponding path program 16 times [2021-05-21 15:23:13,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:13,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587449660] [2021-05-21 15:23:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:13,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:13,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587449660] [2021-05-21 15:23:13,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587449660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:13,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391462763] [2021-05-21 15:23:13,635 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 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 [2021-05-21 15:23:13,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:23:13,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:13,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:13,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:13,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391462763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:13,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:13,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:13,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241093680] [2021-05-21 15:23:13,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:13,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:13,905 INFO L87 Difference]: Start difference. First operand 3871 states and 10732 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:14,371 INFO L93 Difference]: Finished difference Result 6407 states and 16676 transitions. [2021-05-21 15:23:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:23:14,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:14,381 INFO L225 Difference]: With dead ends: 6407 [2021-05-21 15:23:14,381 INFO L226 Difference]: Without dead ends: 6255 [2021-05-21 15:23:14,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 441.0ms TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:23:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6255 states. [2021-05-21 15:23:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6255 to 4091. [2021-05-21 15:23:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4091 states, 4090 states have (on average 2.7863080684596575) internal successors, (11396), 4090 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4091 states to 4091 states and 11396 transitions. [2021-05-21 15:23:14,443 INFO L78 Accepts]: Start accepts. Automaton has 4091 states and 11396 transitions. Word has length 57 [2021-05-21 15:23:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:14,443 INFO L482 AbstractCegarLoop]: Abstraction has 4091 states and 11396 transitions. [2021-05-21 15:23:14,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4091 states and 11396 transitions. [2021-05-21 15:23:14,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:14,448 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:14,448 INFO L521 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, 1, 1] [2021-05-21 15:23:14,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 15:23:14,665 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:14,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1967873632, now seen corresponding path program 17 times [2021-05-21 15:23:14,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:14,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350126947] [2021-05-21 15:23:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:14,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350126947] [2021-05-21 15:23:14,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350126947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651723224] [2021-05-21 15:23:14,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 15:23:14,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:23:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:14,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:14,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651723224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:14,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:14,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:15,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582603126] [2021-05-21 15:23:15,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:15,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:15,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:15,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:15,001 INFO L87 Difference]: Start difference. First operand 4091 states and 11396 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:15,481 INFO L93 Difference]: Finished difference Result 6662 states and 17181 transitions. [2021-05-21 15:23:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:23:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:15,491 INFO L225 Difference]: With dead ends: 6662 [2021-05-21 15:23:15,491 INFO L226 Difference]: Without dead ends: 6510 [2021-05-21 15:23:15,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:23:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2021-05-21 15:23:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 4144. [2021-05-21 15:23:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 2.7859039343470915) internal successors, (11542), 4143 states have internal predecessors, (11542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 11542 transitions. [2021-05-21 15:23:15,605 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 11542 transitions. Word has length 57 [2021-05-21 15:23:15,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:15,606 INFO L482 AbstractCegarLoop]: Abstraction has 4144 states and 11542 transitions. [2021-05-21 15:23:15,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 11542 transitions. [2021-05-21 15:23:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:15,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:15,611 INFO L521 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, 1, 1] [2021-05-21 15:23:15,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 15:23:15,834 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:15,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:15,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2068634654, now seen corresponding path program 18 times [2021-05-21 15:23:15,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:15,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988519327] [2021-05-21 15:23:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:15,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:15,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988519327] [2021-05-21 15:23:15,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988519327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:15,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525779724] [2021-05-21 15:23:15,923 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 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 [2021-05-21 15:23:15,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:23:15,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:15,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:16,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525779724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:16,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:16,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:16,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413896104] [2021-05-21 15:23:16,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:16,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:16,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:16,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:16,182 INFO L87 Difference]: Start difference. First operand 4144 states and 11542 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:16,689 INFO L93 Difference]: Finished difference Result 6621 states and 17407 transitions. [2021-05-21 15:23:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:23:16,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:16,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:16,702 INFO L225 Difference]: With dead ends: 6621 [2021-05-21 15:23:16,702 INFO L226 Difference]: Without dead ends: 6469 [2021-05-21 15:23:16,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 496.7ms TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:23:16,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2021-05-21 15:23:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 4249. [2021-05-21 15:23:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 4248 states have (on average 2.803201506591337) internal successors, (11908), 4248 states have internal predecessors, (11908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 11908 transitions. [2021-05-21 15:23:16,764 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 11908 transitions. Word has length 57 [2021-05-21 15:23:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:16,764 INFO L482 AbstractCegarLoop]: Abstraction has 4249 states and 11908 transitions. [2021-05-21 15:23:16,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 11908 transitions. [2021-05-21 15:23:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:16,769 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:16,769 INFO L521 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, 1, 1] [2021-05-21 15:23:16,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 15:23:16,992 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:16,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:16,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1964168912, now seen corresponding path program 19 times [2021-05-21 15:23:16,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:16,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159083275] [2021-05-21 15:23:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:17,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:17,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159083275] [2021-05-21 15:23:17,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159083275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:17,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585678952] [2021-05-21 15:23:17,080 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 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 [2021-05-21 15:23:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:17,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:17,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:17,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585678952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:17,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:17,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:17,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125929364] [2021-05-21 15:23:17,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:17,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:17,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:17,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:17,341 INFO L87 Difference]: Start difference. First operand 4249 states and 11908 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:17,889 INFO L93 Difference]: Finished difference Result 6984 states and 18791 transitions. [2021-05-21 15:23:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:23:17,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:17,900 INFO L225 Difference]: With dead ends: 6984 [2021-05-21 15:23:17,900 INFO L226 Difference]: Without dead ends: 6832 [2021-05-21 15:23:17,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:23:17,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-05-21 15:23:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 4369. [2021-05-21 15:23:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4368 states have (on average 2.8120421245421245) internal successors, (12283), 4368 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) [2021-05-21 15:23:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 12283 transitions. [2021-05-21 15:23:18,026 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 12283 transitions. Word has length 57 [2021-05-21 15:23:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:18,026 INFO L482 AbstractCegarLoop]: Abstraction has 4369 states and 12283 transitions. [2021-05-21 15:23:18,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 12283 transitions. [2021-05-21 15:23:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:18,032 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:18,032 INFO L521 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, 1, 1] [2021-05-21 15:23:18,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:18,256 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:18,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1161599372, now seen corresponding path program 20 times [2021-05-21 15:23:18,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:18,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646239800] [2021-05-21 15:23:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:18,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:18,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646239800] [2021-05-21 15:23:18,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646239800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:18,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225165012] [2021-05-21 15:23:18,339 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 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 [2021-05-21 15:23:18,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:23:18,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:18,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:18,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225165012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:18,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:18,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:23:18,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965256117] [2021-05-21 15:23:18,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:23:18,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:18,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:23:18,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:23:18,655 INFO L87 Difference]: Start difference. First operand 4369 states and 12283 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:19,497 INFO L93 Difference]: Finished difference Result 9343 states and 25074 transitions. [2021-05-21 15:23:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:23:19,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:19,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:19,508 INFO L225 Difference]: With dead ends: 9343 [2021-05-21 15:23:19,508 INFO L226 Difference]: Without dead ends: 8737 [2021-05-21 15:23:19,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 818.0ms TimeCoverageRelationStatistics Valid=739, Invalid=2683, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:23:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8737 states. [2021-05-21 15:23:19,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8737 to 4286. [2021-05-21 15:23:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 4285 states have (on average 2.779229871645274) internal successors, (11909), 4285 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 11909 transitions. [2021-05-21 15:23:19,584 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 11909 transitions. Word has length 57 [2021-05-21 15:23:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:19,584 INFO L482 AbstractCegarLoop]: Abstraction has 4286 states and 11909 transitions. [2021-05-21 15:23:19,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 11909 transitions. [2021-05-21 15:23:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:19,589 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:19,589 INFO L521 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, 1, 1] [2021-05-21 15:23:19,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:19,812 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1989449508, now seen corresponding path program 21 times [2021-05-21 15:23:19,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:19,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494151807] [2021-05-21 15:23:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:19,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:19,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494151807] [2021-05-21 15:23:19,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494151807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:19,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118696462] [2021-05-21 15:23:19,894 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 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 [2021-05-21 15:23:19,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:23:19,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:19,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:19,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:20,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118696462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:20,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:20,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:20,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620308125] [2021-05-21 15:23:20,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:20,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:20,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:20,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:20,126 INFO L87 Difference]: Start difference. First operand 4286 states and 11909 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:20,707 INFO L93 Difference]: Finished difference Result 7161 states and 18719 transitions. [2021-05-21 15:23:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:23:20,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:20,715 INFO L225 Difference]: With dead ends: 7161 [2021-05-21 15:23:20,715 INFO L226 Difference]: Without dead ends: 7009 [2021-05-21 15:23:20,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 539.1ms TimeCoverageRelationStatistics Valid=492, Invalid=1578, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:23:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2021-05-21 15:23:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 4481. [2021-05-21 15:23:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 4480 states have (on average 2.7988839285714286) internal successors, (12539), 4480 states have internal predecessors, (12539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 12539 transitions. [2021-05-21 15:23:20,782 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 12539 transitions. Word has length 57 [2021-05-21 15:23:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:20,782 INFO L482 AbstractCegarLoop]: Abstraction has 4481 states and 12539 transitions. [2021-05-21 15:23:20,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 12539 transitions. [2021-05-21 15:23:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:20,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:20,786 INFO L521 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, 1, 1] [2021-05-21 15:23:20,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-21 15:23:20,987 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:20,987 INFO L82 PathProgramCache]: Analyzing trace with hash -662949862, now seen corresponding path program 22 times [2021-05-21 15:23:20,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:20,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612650525] [2021-05-21 15:23:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:21,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612650525] [2021-05-21 15:23:21,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612650525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996645498] [2021-05-21 15:23:21,066 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 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 [2021-05-21 15:23:21,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:23:21,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:21,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996645498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:21,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:21,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:21,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881941723] [2021-05-21 15:23:21,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:21,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:21,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:21,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:21,301 INFO L87 Difference]: Start difference. First operand 4481 states and 12539 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:21,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:21,935 INFO L93 Difference]: Finished difference Result 7612 states and 20416 transitions. [2021-05-21 15:23:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:23:21,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:21,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:21,944 INFO L225 Difference]: With dead ends: 7612 [2021-05-21 15:23:21,944 INFO L226 Difference]: Without dead ends: 7460 [2021-05-21 15:23:21,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 589.3ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:23:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2021-05-21 15:23:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 4601. [2021-05-21 15:23:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4600 states have (on average 2.807391304347826) internal successors, (12914), 4600 states have internal predecessors, (12914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 12914 transitions. [2021-05-21 15:23:22,013 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 12914 transitions. Word has length 57 [2021-05-21 15:23:22,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:22,014 INFO L482 AbstractCegarLoop]: Abstraction has 4601 states and 12914 transitions. [2021-05-21 15:23:22,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:22,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 12914 transitions. [2021-05-21 15:23:22,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:22,018 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:22,018 INFO L521 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, 1, 1] [2021-05-21 15:23:22,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:22,219 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:22,219 INFO L82 PathProgramCache]: Analyzing trace with hash -723417374, now seen corresponding path program 23 times [2021-05-21 15:23:22,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:22,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613529366] [2021-05-21 15:23:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:22,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:22,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613529366] [2021-05-21 15:23:22,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613529366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:22,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312637792] [2021-05-21 15:23:22,306 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 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 [2021-05-21 15:23:22,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:23:22,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:22,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-05-21 15:37:03,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:37:03,649 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 15:37:03,650 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 15:37:03,652 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 15:37:03,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 03:37:03 BasicIcfg [2021-05-21 15:37:03,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 15:37:03,652 INFO L168 Benchmark]: Toolchain (without parser) took 867956.99 ms. Allocated memory was 356.5 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 318.4 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-05-21 15:37:03,652 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 356.5 MB. Free memory was 336.9 MB in the beginning and 336.8 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 15:37:03,652 INFO L168 Benchmark]: CACSL2BoogieTranslator took 509.91 ms. Allocated memory is still 356.5 MB. Free memory was 318.2 MB in the beginning and 320.0 MB in the end (delta: -1.8 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-05-21 15:37:03,652 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.62 ms. Allocated memory is still 356.5 MB. Free memory was 320.0 MB in the beginning and 317.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:37:03,653 INFO L168 Benchmark]: Boogie Preprocessor took 20.34 ms. Allocated memory is still 356.5 MB. Free memory was 317.9 MB in the beginning and 316.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:37:03,653 INFO L168 Benchmark]: RCFGBuilder took 394.19 ms. Allocated memory is still 356.5 MB. Free memory was 316.9 MB in the beginning and 293.8 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:37:03,653 INFO L168 Benchmark]: TraceAbstraction took 866996.12 ms. Allocated memory was 356.5 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 292.7 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-05-21 15:37:03,653 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 356.5 MB. Free memory was 336.9 MB in the beginning and 336.8 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 509.91 ms. Allocated memory is still 356.5 MB. Free memory was 318.2 MB in the beginning and 320.0 MB in the end (delta: -1.8 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 31.62 ms. Allocated memory is still 356.5 MB. Free memory was 320.0 MB in the beginning and 317.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.34 ms. Allocated memory is still 356.5 MB. Free memory was 317.9 MB in the beginning and 316.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 394.19 ms. Allocated memory is still 356.5 MB. Free memory was 316.9 MB in the beginning and 293.8 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 866996.12 ms. Allocated memory was 356.5 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 292.7 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 730]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 58 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 866878.7ms, OverallIterations: 50, TraceHistogramMax: 4, EmptinessCheckTime: 212.1ms, AutomataDifference: 17049.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 116.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4467 SDtfs, 27863 SDslu, 39819 SDs, 0 SdLazy, 6650 SolverSat, 1812 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3645.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3453 GetRequests, 2036 SyntacticMatches, 28 SemanticMatches, 1389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13226 ImplicationChecksByTransitivity, 16181.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4601occurred in iteration=49, InterpolantAutomatonStates: 1181, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2981.9ms AutomataMinimizationTime, 49 MinimizatonAttempts, 80952 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 514.6ms SsaConstructionTime, 1133.2ms SatisfiabilityAnalysisTime, 12468.3ms InterpolantComputationTime, 4847 NumberOfCodeBlocks, 4847 NumberOfCodeBlocksAsserted, 148 NumberOfCheckSat, 4756 ConstructedInterpolants, 0 QuantifiedInterpolants, 35246 SizeOfPredicates, 84 NumberOfNonLiveVariables, 5712 ConjunctsInSsa, 484 ConjunctsInUnsatCore, 91 InterpolantComputations, 7 PerfectInterpolantSequences, 0/930 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